src/syscall/zx/fidl/fidl_test/conformance_test.go - third_party/go - Git at Google

 // Copyright 2019 The Fuchsia Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // Code generated by tools/fidl/gidl-conformance-suite/regen.sh; DO NOT EDIT.

 // +build fuchsia

 //
 package fidl_test

 import (
 	"reflect"
 	"testing"

 	"syscall/zx/fidl"
 	"syscall/zx/fidl/conformance"
 )

 func TestAllEncodeSuccessCases(t *testing.T) {

 	{
 		v1 := conformance.ThreeByteInStruct{}
 		v2 := conformance.ThreeByte{}
 		var v3 uint8 = 1
 		v2.Elem1 = v3
 		var v4 uint8 = 2
 		v2.Elem2 = v4
 		var v5 uint8 = 3
 		v2.Elem3 = v5
 		v1.Elem1 = v2
 		v6 := conformance.ThreeByte{}
 		var v7 uint8 = 4
 		v6.Elem1 = v7
 		var v8 uint8 = 5
 		v6.Elem2 = v8
 		var v9 uint8 = 6
 		v6.Elem3 = v9
 		v1.Elem2 = v6
 		v10 := conformance.ThreeByte{}
 		var v11 uint8 = 7
 		v10.Elem1 = v11
 		var v12 uint8 = 8
 		v10.Elem2 = v12
 		var v13 uint8 = 9
 		v10.Elem3 = v13
 		v1.Elem3 = v10

 		encodeSuccessCase{
 			name: "3ByteObjectAlignmentInStruct",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
 				0x09, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.FiveByteInStruct{}
 		v2 := conformance.FiveByte{}
 		var v3 uint32 = 16909060
 		v2.Elem1 = v3
 		var v4 uint8 = 5
 		v2.Elem2 = v4
 		v1.Elem1 = v2
 		v5 := conformance.FiveByte{}
 		var v6 uint32 = 101124105
 		v5.Elem1 = v6
 		var v7 uint8 = 10
 		v5.Elem2 = v7
 		v1.Elem2 = v5
 		v8 := conformance.FiveByte{}
 		var v9 uint32 = 185339150
 		v8.Elem1 = v9
 		var v10 uint8 = 15
 		v8.Elem2 = v10
 		v1.Elem3 = v8

 		encodeSuccessCase{
 			name: "5ByteObjectAlignmentInStruct",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x04, 0x03, 0x02, 0x01, 0x05, 0x00, 0x00, 0x00,
 				0x09, 0x08, 0x07, 0x06, 0x0a, 0x00, 0x00, 0x00,
 				0x0e, 0x0d, 0x0c, 0x0b, 0x0f, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.ThreeByteInVector{}
 		v2 := conformance.ThreeByte{}
 		var v3 uint8 = 1
 		v2.Elem1 = v3
 		var v4 uint8 = 2
 		v2.Elem2 = v4
 		var v5 uint8 = 3
 		v2.Elem3 = v5
 		v6 := conformance.ThreeByte{}
 		var v7 uint8 = 4
 		v6.Elem1 = v7
 		var v8 uint8 = 5
 		v6.Elem2 = v8
 		var v9 uint8 = 6
 		v6.Elem3 = v9
 		v10 := conformance.ThreeByte{}
 		var v11 uint8 = 7
 		v10.Elem1 = v11
 		var v12 uint8 = 8
 		v10.Elem2 = v12
 		var v13 uint8 = 9
 		v10.Elem3 = v13
 		v14 := []conformance.ThreeByte{v2, v6, v10}
 		v1.Elems = v14

 		encodeSuccessCase{
 			name: "3ByteObjectAlignmentInVector",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
 				0x09, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.FiveByteInVector{}
 		v2 := conformance.FiveByte{}
 		var v3 uint32 = 16909060
 		v2.Elem1 = v3
 		var v4 uint8 = 5
 		v2.Elem2 = v4
 		v5 := conformance.FiveByte{}
 		var v6 uint32 = 101124105
 		v5.Elem1 = v6
 		var v7 uint8 = 10
 		v5.Elem2 = v7
 		v8 := conformance.FiveByte{}
 		var v9 uint32 = 185339150
 		v8.Elem1 = v9
 		var v10 uint8 = 15
 		v8.Elem2 = v10
 		v11 := []conformance.FiveByte{v2, v5, v8}
 		v1.Elems = v11

 		encodeSuccessCase{
 			name: "5ByteObjectAlignmentInVector",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x04, 0x03, 0x02, 0x01, 0x05, 0x00, 0x00, 0x00,
 				0x09, 0x08, 0x07, 0x06, 0x0a, 0x00, 0x00, 0x00,
 				0x0e, 0x0d, 0x0c, 0x0b, 0x0f, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.ThreeByteInArray{}
 		v2 := conformance.ThreeByte{}
 		var v3 uint8 = 1
 		v2.Elem1 = v3
 		var v4 uint8 = 2
 		v2.Elem2 = v4
 		var v5 uint8 = 3
 		v2.Elem3 = v5
 		v6 := conformance.ThreeByte{}
 		var v7 uint8 = 4
 		v6.Elem1 = v7
 		var v8 uint8 = 5
 		v6.Elem2 = v8
 		var v9 uint8 = 6
 		v6.Elem3 = v9
 		v10 := conformance.ThreeByte{}
 		var v11 uint8 = 7
 		v10.Elem1 = v11
 		var v12 uint8 = 8
 		v10.Elem2 = v12
 		var v13 uint8 = 9
 		v10.Elem3 = v13
 		v14 := [3]conformance.ThreeByte{v2, v6, v10}
 		v1.Elems = v14

 		encodeSuccessCase{
 			name: "3ByteObjectAlignmentInArray",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
 				0x09, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.FiveByteInArray{}
 		v2 := conformance.FiveByte{}
 		var v3 uint32 = 16909060
 		v2.Elem1 = v3
 		var v4 uint8 = 5
 		v2.Elem2 = v4
 		v5 := conformance.FiveByte{}
 		var v6 uint32 = 101124105
 		v5.Elem1 = v6
 		var v7 uint8 = 10
 		v5.Elem2 = v7
 		v8 := conformance.FiveByte{}
 		var v9 uint32 = 185339150
 		v8.Elem1 = v9
 		var v10 uint8 = 15
 		v8.Elem2 = v10
 		v11 := [3]conformance.FiveByte{v2, v5, v8}
 		v1.Elems = v11

 		encodeSuccessCase{
 			name: "5ByteObjectAlignmentInArray",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x04, 0x03, 0x02, 0x01, 0x05, 0x00, 0x00, 0x00,
 				0x09, 0x08, 0x07, 0x06, 0x0a, 0x00, 0x00, 0x00,
 				0x0e, 0x0d, 0x0c, 0x0b, 0x0f, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.EmptyStruct{}

 		encodeSuccessCase{
 			name: "EmptyStruct",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.EmptyStructSandwich{}
 		v2 := "before"
 		v1.Before = v2
 		v3 := conformance.EmptyStruct{}
 		v1.Es = v3
 		v4 := "after"
 		v1.After = v4

 		encodeSuccessCase{
 			name: "EmptyStructSandwich",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x62, 0x65, 0x66, 0x6f, 0x72, 0x65, 0x00, 0x00,
 				0x61, 0x66, 0x74, 0x65, 0x72, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Uint8Uint16Uint32Uint64{}
 		var v2 uint8 = 1
 		v1.F1 = v2
 		var v3 uint16 = 515
 		v1.F2 = v3
 		var v4 uint32 = 67438087
 		v1.F3 = v4
 		var v5 uint64 = 579005069656919567
 		v1.F4 = v5

 		encodeSuccessCase{
 			name: "Uint8Uint16Uint32Uint64",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x00, 0x03, 0x02, 0x07, 0x06, 0x05, 0x04,
 				0x0f, 0x0e, 0x0d, 0x0c, 0x0b, 0x0a, 0x09, 0x08,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Uint64Uint32Uint16Uint8{}
 		var v2 uint64 = 579005069656919567
 		v1.F1 = v2
 		var v3 uint32 = 67438087
 		v1.F2 = v3
 		var v4 uint16 = 515
 		v1.F3 = v4
 		var v5 uint8 = 1
 		v1.F4 = v5

 		encodeSuccessCase{
 			name: "Uint64Uint32Uint16Uint8",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x0f, 0x0e, 0x0d, 0x0c, 0x0b, 0x0a, 0x09, 0x08,
 				0x07, 0x06, 0x05, 0x04, 0x03, 0x02, 0x01, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.StructOfSimpleTable{}
 		v2 := conformance.SimpleTable{}
 		v1.Table = v2

 		encodeSuccessCase{
 			name: "SimpleTableEmpty",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.StructOfSimpleTable{}
 		v2 := conformance.SimpleTable{}
 		var v3 int64 = 42
 		v2.SetX(v3)
 		var v4 int64 = 67
 		v2.SetY(v4)
 		v1.Table = v2

 		encodeSuccessCase{
 			name: "SimpleTableXAndY",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x2a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x43, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.StructOfSimpleTable{}
 		v2 := conformance.SimpleTable{}
 		var v3 int64 = 67
 		v2.SetY(v3)
 		v1.Table = v2

 		encodeSuccessCase{
 			name: "SimpleTableJustY",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x43, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.StructOfTableWithStringAndVector{}
 		v2 := conformance.TableWithStringAndVector{}
 		v3 := "hello"
 		v2.SetFoo(v3)
 		var v4 int32 = 27
 		v2.SetBar(v4)
 		v1.Table = v2

 		encodeSuccessCase{
 			name: "TableWithStringAndVectorNoVectorContent",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x00, 0x00, 0x00,
 				0x1b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.SimpleTableThenUint64{}
 		v2 := conformance.SimpleTable{}
 		var v3 int64 = 42
 		v2.SetX(v3)
 		var v4 int64 = 67
 		v2.SetY(v4)
 		v1.Table = v2
 		var v5 uint64 = 16045690984833335023
 		v1.Number = v5

 		encodeSuccessCase{
 			name: "SimpleTableThenUint64",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0xef, 0xbe, 0xad, 0xde, 0xef, 0xbe, 0xad, 0xde,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x2a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x43, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.TestInlineXUnionInStruct{}
 		v2 := "before"
 		v1.Before = v2
 		v3 := conformance.SampleXUnion{}
 		var v4 uint32 = 3735928559
 		v3.SetU(v4)
 		v1.Xu = v3
 		v5 := "after"
 		v1.After = v5

 		encodeSuccessCase{
 			name: "InlineXUnionInStruct",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0xb2, 0x56, 0x9c, 0x38, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x62, 0x65, 0x66, 0x6f, 0x72, 0x65, 0x00, 0x00,
 				0xef, 0xbe, 0xad, 0xde, 0x00, 0x00, 0x00, 0x00,
 				0x61, 0x66, 0x74, 0x65, 0x72, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.TestOptionalXUnionInStruct{}
 		v2 := "before"
 		v1.Before = v2
 		v3 := "after"
 		v1.After = v3

 		encodeSuccessCase{
 			name: "OptionalXUnionInStructAbsent",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x62, 0x65, 0x66, 0x6f, 0x72, 0x65, 0x00, 0x00,
 				0x61, 0x66, 0x74, 0x65, 0x72, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.TestOptionalXUnionInStruct{}
 		v2 := "before"
 		v1.Before = v2
 		v3 := &conformance.SampleXUnion{}
 		var v4 uint32 = 3735928559
 		v3.SetU(v4)
 		v1.Xu = v3
 		v5 := "after"
 		v1.After = v5

 		encodeSuccessCase{
 			name: "OptionalXUnionInStructPresent",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0xb2, 0x56, 0x9c, 0x38, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x62, 0x65, 0x66, 0x6f, 0x72, 0x65, 0x00, 0x00,
 				0xef, 0xbe, 0xad, 0xde, 0x00, 0x00, 0x00, 0x00,
 				0x61, 0x66, 0x74, 0x65, 0x72, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.TestXUnionInTable{}
 		v2 := conformance.XUnionInTable{}
 		v3 := "before"
 		v2.SetBefore(v3)
 		v4 := "after"
 		v2.SetAfter(v4)
 		v1.Value = v2

 		encodeSuccessCase{
 			name: "XUnionInTableXUnionAbsent",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x62, 0x65, 0x66, 0x6f, 0x72, 0x65, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x61, 0x66, 0x74, 0x65, 0x72, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.TestXUnionInTable{}
 		v2 := conformance.XUnionInTable{}
 		v3 := "before"
 		v2.SetBefore(v3)
 		v4 := conformance.SampleXUnion{}
 		var v5 uint32 = 3735928559
 		v4.SetU(v5)
 		v2.SetXu(v4)
 		v6 := "after"
 		v2.SetAfter(v6)
 		v1.Value = v2

 		encodeSuccessCase{
 			name: "XUnionInTableXUnionPresent",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x62, 0x65, 0x66, 0x6f, 0x72, 0x65, 0x00, 0x00,
 				0xb2, 0x56, 0x9c, 0x38, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0xef, 0xbe, 0xad, 0xde, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x61, 0x66, 0x74, 0x65, 0x72, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.TestStrictXUnionInStruct{}
 		v2 := conformance.SampleStrictXUnion{}
 		var v3 uint32 = 3735928559
 		v2.SetU(v3)
 		v1.Xu = v2

 		encodeSuccessCase{
 			name: "StrictXUnion",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x72, 0xea, 0xe2, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0xef, 0xbe, 0xad, 0xde, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.TestAddEthernetDeviceRequest{}
 		v2 := "@/dev/sys/pci/00:03.0/e1000/ethernet"
 		v1.TopologicalPath = v2
 		v3 := conformance.InterfaceConfig{}
 		v4 := "ethp0003"
 		v3.Name = v4
 		v5 := conformance.IpAddressConfig{}
 		v6 := true
 		v5.SetDhcp(v6)
 		v3.IpAddressConfig = v5
 		v1.Config = v3
 		var v7 uint32 = 4294967295
 		v1.ThisShouldBeAHandle = v7

 		encodeSuccessCase{
 			name: "AddEthernetDeviceRequest",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x24, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00,
 				0x40, 0x2f, 0x64, 0x65, 0x76, 0x2f, 0x73, 0x79,
 				0x73, 0x2f, 0x70, 0x63, 0x69, 0x2f, 0x30, 0x30,
 				0x3a, 0x30, 0x33, 0x2e, 0x30, 0x2f, 0x65, 0x31,
 				0x30, 0x30, 0x30, 0x2f, 0x65, 0x74, 0x68, 0x65,
 				0x72, 0x6e, 0x65, 0x74, 0x00, 0x00, 0x00, 0x00,
 				0x65, 0x74, 0x68, 0x70, 0x30, 0x30, 0x30, 0x33,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.FileGetAttrResponse{}
 		var v2 int32 = 2125315759
 		v1.S = v2
 		v3 := conformance.NodeAttributes{}
 		var v4 uint32 = 2518909348
 		v3.Mode = v4
 		var v5 uint64 = 1
 		v3.Id = v5
 		var v6 uint64 = 231
 		v3.ContentSize = v6
 		var v7 uint64 = 231
 		v3.StorageSize = v7
 		var v8 uint64 = 1
 		v3.LinkCount = v8
 		var v9 uint64 = 9833440827789222417
 		v3.CreationTime = v9
 		var v10 uint64 = 72038755451251353
 		v3.ModificationTime = v10
 		v1.Attributes = v3

 		encodeSuccessCase{
 			name: "FileGetAttrResponse",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0xaf, 0xbe, 0xad, 0x7e, 0x00, 0x00, 0x00, 0x00,
 				0xa4, 0x81, 0x23, 0x96, 0x00, 0x00, 0x00, 0x00,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xe7, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xe7, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88,
 				0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.StructWithOptionals{}
 		v2 := conformance.EmptyStruct{}
 		v1.S = v2
 		v3 := &conformance.EmptyStruct{}
 		v1.S2 = v3
 		v4 := conformance.TableWithEmptyStruct{}
 		v5 := conformance.EmptyStruct{}
 		v4.SetS(v5)
 		v1.T = v4
 		v6 := conformance.XUnionWithEmptyStruct{}
 		v7 := conformance.EmptyStruct{}
 		v6.SetS(v7)
 		v1.Xu = v6
 		v8 := &conformance.XUnionWithEmptyStruct{}
 		v9 := conformance.EmptyStruct{}
 		v8.SetS(v9)
 		v1.Xu2 = v8
 		v10 := conformance.UnionWithEmptyStruct{}
 		v11 := conformance.EmptyStruct{}
 		v10.SetS(v11)
 		v1.U = v10
 		v12 := &conformance.UnionWithEmptyStruct{}
 		v13 := conformance.EmptyStruct{}
 		v12.SetS(v13)
 		v1.U2 = v12

 		encodeSuccessCase{
 			name: "Optionals",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0xfe, 0xe0, 0x99, 0x74, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0xfe, 0xe0, 0x99, 0x74, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.StructWithArrays{}
 		var v2 int32 = 1
 		var v3 int32 = 2
 		v4 := [2]int32{v2, v3}
 		v1.ArrInt = v4
 		v5 := "a"
 		v6 := "b"
 		v7 := [2]string{v5, v6}
 		v1.ArrString = v7
 		v8 := "c"
 		v9 := &v8
 		var v10 *string = nil
 		v11 := [2]*string{v9, v10}
 		v1.ArrNullableString = v11
 		v12 := conformance.StructWithInt{}
 		var v13 int32 = 1
 		v12.X = v13
 		v14 := conformance.StructWithInt{}
 		var v15 int32 = 2
 		v14.X = v15
 		v16 := [2]conformance.StructWithInt{v12, v14}
 		v1.ArrStruct = v16
 		var v17 *conformance.StructWithInt = nil
 		v18 := &conformance.StructWithInt{}
 		var v19 int32 = 16909060
 		v18.X = v19
 		v20 := [2]*conformance.StructWithInt{v17, v18}
 		v1.ArrNullableStruct = v20
 		var v21 int32 = 1
 		var v22 int32 = 2
 		var v23 int32 = 3
 		v24 := [3]int32{v21, v22, v23}
 		var v25 int32 = 4
 		var v26 int32 = 5
 		var v27 int32 = 6
 		v28 := [3]int32{v25, v26, v27}
 		v29 := [2][3]int32{v24, v28}
 		v1.ArrArrInt = v29

 		encodeSuccessCase{
 			name: "Arrays",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00,
 				0x61, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x62, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x63, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x04, 0x03, 0x02, 0x01, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.StructWithVectors{}
 		v2 := []int32{}
 		v1.VecEmpty = v2
 		var v3 int32 = 1
 		var v4 int32 = 2
 		v5 := []int32{v3, v4}
 		v1.VecInt = v5
 		v6 := "a"
 		v7 := "b"
 		v8 := []string{v6, v7}
 		v1.VecString = v8
 		var v9 *string = nil
 		v10 := "c"
 		v11 := &v10
 		var v12 *string = nil
 		v13 := []*string{v9, v11, v12}
 		v1.VecNullableString = v13
 		v14 := conformance.StructWithInt{}
 		var v15 int32 = 1
 		v14.X = v15
 		v16 := []conformance.StructWithInt{v14}
 		v1.VecStruct = v16
 		var v17 *conformance.StructWithInt = nil
 		var v18 *conformance.StructWithInt = nil
 		v19 := &conformance.StructWithInt{}
 		var v20 int32 = 2
 		v19.X = v20
 		v21 := []*conformance.StructWithInt{v17, v18, v19}
 		v1.VecNullableStruct = v21
 		var v22 int32 = 1
 		var v23 int32 = 2
 		v24 := []int32{v22, v23}
 		var v25 int32 = 3
 		v26 := []int32{v25}
 		v27 := [][]int32{v24, v26}
 		v1.VecVecInt = v27

 		encodeSuccessCase{
 			name: "Vectors",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x61, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x62, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x63, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyBool{}
 		v2 := true
 		v1.Value = v2

 		encodeSuccessCase{
 			name: "BoolTrue",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyBool{}
 		v2 := false
 		v1.Value = v2

 		encodeSuccessCase{
 			name: "BoolFalse",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyByte{}
 		var v2 uint8 = 0
 		v1.Value = v2

 		encodeSuccessCase{
 			name: "ByteZero",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyByte{}
 		var v2 uint8 = 255
 		v1.Value = v2

 		encodeSuccessCase{
 			name: "Byte255",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyInt8{}
 		var v2 int8 = -128
 		v1.Value = v2

 		encodeSuccessCase{
 			name: "Int8Min",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyInt8{}
 		var v2 int8 = 0
 		v1.Value = v2

 		encodeSuccessCase{
 			name: "Int8Zero",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyInt8{}
 		var v2 int8 = 127
 		v1.Value = v2

 		encodeSuccessCase{
 			name: "Int8Max",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x7f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyInt16{}
 		var v2 int16 = -32768
 		v1.Value = v2

 		encodeSuccessCase{
 			name: "Int16Min",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyInt16{}
 		var v2 int16 = 0
 		v1.Value = v2

 		encodeSuccessCase{
 			name: "Int16Zero",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyInt16{}
 		var v2 int16 = 32767
 		v1.Value = v2

 		encodeSuccessCase{
 			name: "Int16Max",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0xff, 0x7f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyInt32{}
 		var v2 int32 = -2147483648
 		v1.Value = v2

 		encodeSuccessCase{
 			name: "Int32Min",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyInt32{}
 		var v2 int32 = 0
 		v1.Value = v2

 		encodeSuccessCase{
 			name: "Int32Zero",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyInt32{}
 		var v2 int32 = 2147483647
 		v1.Value = v2

 		encodeSuccessCase{
 			name: "Int32Max",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0xff, 0xff, 0xff, 0x7f, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyInt64{}
 		var v2 int64 = -9223372036854775808
 		v1.Value = v2

 		encodeSuccessCase{
 			name: "Int64Min",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyInt64{}
 		var v2 int64 = 0
 		v1.Value = v2

 		encodeSuccessCase{
 			name: "Int64Zero",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyInt64{}
 		var v2 int64 = 9223372036854775807
 		v1.Value = v2

 		encodeSuccessCase{
 			name: "Int64Max",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x7f,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyUint8{}
 		var v2 uint8 = 0
 		v1.Value = v2

 		encodeSuccessCase{
 			name: "Uint8Zero",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyUint8{}
 		var v2 uint8 = 255
 		v1.Value = v2

 		encodeSuccessCase{
 			name: "Uint8Max",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyUint16{}
 		var v2 uint16 = 0
 		v1.Value = v2

 		encodeSuccessCase{
 			name: "Uint16Zero",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyUint16{}
 		var v2 uint16 = 65535
 		v1.Value = v2

 		encodeSuccessCase{
 			name: "Uint16Max",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyUint32{}
 		var v2 uint32 = 0
 		v1.Value = v2

 		encodeSuccessCase{
 			name: "Uint32Zero",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyUint32{}
 		var v2 uint32 = 4294967295
 		v1.Value = v2

 		encodeSuccessCase{
 			name: "Uint32Max",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyUint64{}
 		var v2 uint64 = 0
 		v1.Value = v2

 		encodeSuccessCase{
 			name: "Uint64Zero",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyUint64{}
 		var v2 uint64 = 18446744073709551615
 		v1.Value = v2

 		encodeSuccessCase{
 			name: "Uint64Max",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyFloat32{}
 		var v2 float32 = 0
 		v1.Value = v2

 		encodeSuccessCase{
 			name: "Float32Zero",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyFloat32{}
 		var v2 float32 = 1
 		v1.Value = v2

 		encodeSuccessCase{
 			name: "Float32One",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x80, 0x3f, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyFloat32{}
 		var v2 float32 = -1
 		v1.Value = v2

 		encodeSuccessCase{
 			name: "Float32MinusOne",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x80, 0xbf, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyFloat32{}
 		var v2 float32 = 3.4028234663852886e+38
 		v1.Value = v2

 		encodeSuccessCase{
 			name: "Float32Max",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0xff, 0xff, 0x7f, 0x7f, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyFloat64{}
 		var v2 float64 = 0
 		v1.Value = v2

 		encodeSuccessCase{
 			name: "Float64Zero",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyFloat64{}
 		var v2 float64 = 1
 		v1.Value = v2

 		encodeSuccessCase{
 			name: "Float64One",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf0, 0x3f,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyFloat64{}
 		var v2 float64 = -1
 		v1.Value = v2

 		encodeSuccessCase{
 			name: "Float64MinusOne",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf0, 0xbf,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyFloat64{}
 		var v2 float64 = 1.7976931348623157e+308
 		v1.Value = v2

 		encodeSuccessCase{
 			name: "Float64Max",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xef, 0x7f,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich1{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionSize8Align4{}
 		var v4 uint32 = 202050057
 		v3.SetVariant(v4)
 		v1.TheUnion = v3
 		var v5 uint32 = 134678021
 		v1.After = v5

 		encodeSuccessCase{
 			name: "Sandwich1Case1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x02, 0x00, 0x00, 0x00,
 				0x09, 0x0a, 0x0b, 0x0c, 0x05, 0x06, 0x07, 0x08,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich1{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionSize8Align4{}
 		var v4 uint32 = 202050057
 		v3.SetVariant(v4)
 		v1.TheUnion = v3
 		var v5 uint32 = 134678021
 		v1.After = v5

 		encodeSuccessCase{
 			name: "Sandwich1Case1_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0x09, 0x0a, 0x0b, 0x0c, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich2{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionSize12Align4{}
 		var v4 uint8 = 160
 		var v5 uint8 = 161
 		var v6 uint8 = 162
 		var v7 uint8 = 163
 		var v8 uint8 = 164
 		var v9 uint8 = 165
 		v10 := [6]uint8{v4, v5, v6, v7, v8, v9}
 		v3.SetVariant(v10)
 		v1.TheUnion = v3
 		var v11 uint32 = 134678021
 		v1.After = v11

 		encodeSuccessCase{
 			name: "Sandwich2Case1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x03, 0x00, 0x00, 0x00,
 				0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0x00, 0x00,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich2{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionSize12Align4{}
 		var v4 uint8 = 160
 		var v5 uint8 = 161
 		var v6 uint8 = 162
 		var v7 uint8 = 163
 		var v8 uint8 = 164
 		var v9 uint8 = 165
 		v10 := [6]uint8{v4, v5, v6, v7, v8, v9}
 		v3.SetVariant(v10)
 		v1.TheUnion = v3
 		var v11 uint32 = 134678021
 		v1.After = v11

 		encodeSuccessCase{
 			name: "Sandwich2Case1_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich3{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionSize24Align8{}
 		v4 := conformance.StructSize16Align8{}
 		var v5 uint64 = 12080525177006498208
 		v4.F1 = v5
 		var v6 uint64 = 12659246559711111592
 		v4.F2 = v6
 		v3.SetVariant(v4)
 		v1.TheUnion = v3
 		var v7 uint32 = 134678021
 		v1.After = v7

 		encodeSuccessCase{
 			name: "Sandwich3Case1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
 				0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich3{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionSize24Align8{}
 		v4 := conformance.StructSize16Align8{}
 		var v5 uint64 = 12080525177006498208
 		v4.F1 = v5
 		var v6 uint64 = 12659246559711111592
 		v4.F2 = v6
 		v3.SetVariant(v4)
 		v1.TheUnion = v3
 		var v7 uint32 = 134678021
 		v1.After = v7

 		encodeSuccessCase{
 			name: "Sandwich3Case1_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
 				0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich4{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionSize36Align4{}
 		var v4 uint8 = 160
 		var v5 uint8 = 161
 		var v6 uint8 = 162
 		var v7 uint8 = 163
 		var v8 uint8 = 164
 		var v9 uint8 = 165
 		var v10 uint8 = 166
 		var v11 uint8 = 167
 		var v12 uint8 = 168
 		var v13 uint8 = 169
 		var v14 uint8 = 170
 		var v15 uint8 = 171
 		var v16 uint8 = 172
 		var v17 uint8 = 173
 		var v18 uint8 = 174
 		var v19 uint8 = 175
 		var v20 uint8 = 176
 		var v21 uint8 = 177
 		var v22 uint8 = 178
 		var v23 uint8 = 179
 		var v24 uint8 = 180
 		var v25 uint8 = 181
 		var v26 uint8 = 182
 		var v27 uint8 = 183
 		var v28 uint8 = 184
 		var v29 uint8 = 185
 		var v30 uint8 = 186
 		var v31 uint8 = 187
 		var v32 uint8 = 188
 		var v33 uint8 = 189
 		var v34 uint8 = 190
 		var v35 uint8 = 191
 		v36 := [32]uint8{v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35}
 		v3.SetVariant(v36)
 		v1.TheUnion = v3
 		var v37 uint32 = 134678021
 		v1.After = v37

 		encodeSuccessCase{
 			name: "Sandwich4Case1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x03, 0x00, 0x00, 0x00,
 				0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
 				0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
 				0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
 				0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich4{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionSize36Align4{}
 		var v4 uint8 = 160
 		var v5 uint8 = 161
 		var v6 uint8 = 162
 		var v7 uint8 = 163
 		var v8 uint8 = 164
 		var v9 uint8 = 165
 		var v10 uint8 = 166
 		var v11 uint8 = 167
 		var v12 uint8 = 168
 		var v13 uint8 = 169
 		var v14 uint8 = 170
 		var v15 uint8 = 171
 		var v16 uint8 = 172
 		var v17 uint8 = 173
 		var v18 uint8 = 174
 		var v19 uint8 = 175
 		var v20 uint8 = 176
 		var v21 uint8 = 177
 		var v22 uint8 = 178
 		var v23 uint8 = 179
 		var v24 uint8 = 180
 		var v25 uint8 = 181
 		var v26 uint8 = 182
 		var v27 uint8 = 183
 		var v28 uint8 = 184
 		var v29 uint8 = 185
 		var v30 uint8 = 186
 		var v31 uint8 = 187
 		var v32 uint8 = 188
 		var v33 uint8 = 189
 		var v34 uint8 = 190
 		var v35 uint8 = 191
 		v36 := [32]uint8{v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35}
 		v3.SetVariant(v36)
 		v1.TheUnion = v3
 		var v37 uint32 = 134678021
 		v1.After = v37

 		encodeSuccessCase{
 			name: "Sandwich4Case1_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
 				0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
 				0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
 				0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich5{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionOfUnion{}
 		v4 := conformance.UnionSize8Align4{}
 		var v5 uint32 = 202050057
 		v4.SetVariant(v5)
 		v3.SetSize8align4(v4)
 		v1.UnionOfUnion = v3
 		var v6 uint32 = 134678021
 		v1.After = v6

 		encodeSuccessCase{
 			name: "Sandwich5Case1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x02, 0x00, 0x00, 0x00, 0x09, 0x0a, 0x0b, 0x0c,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich5{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionOfUnion{}
 		v4 := conformance.UnionSize8Align4{}
 		var v5 uint32 = 202050057
 		v4.SetVariant(v5)
 		v3.SetSize8align4(v4)
 		v1.UnionOfUnion = v3
 		var v6 uint32 = 134678021
 		v1.After = v6

 		encodeSuccessCase{
 			name: "Sandwich5Case1_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x09, 0x0a, 0x0b, 0x0c, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich5{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionOfUnion{}
 		v4 := conformance.UnionSize24Align8{}
 		v5 := conformance.StructSize16Align8{}
 		var v6 uint64 = 12080525177006498208
 		v5.F1 = v6
 		var v7 uint64 = 12659246559711111592
 		v5.F2 = v7
 		v4.SetVariant(v5)
 		v3.SetSize24align8(v4)
 		v1.UnionOfUnion = v3
 		var v8 uint32 = 134678021
 		v1.After = v8

 		encodeSuccessCase{
 			name: "Sandwich5Case2",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
 				0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich5{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionOfUnion{}
 		v4 := conformance.UnionSize24Align8{}
 		v5 := conformance.StructSize16Align8{}
 		var v6 uint64 = 12080525177006498208
 		v5.F1 = v6
 		var v7 uint64 = 12659246559711111592
 		v5.F2 = v7
 		v4.SetVariant(v5)
 		v3.SetSize24align8(v4)
 		v1.UnionOfUnion = v3
 		var v8 uint32 = 134678021
 		v1.After = v8

 		encodeSuccessCase{
 			name: "Sandwich5Case2_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x28, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
 				0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		var v4 uint8 = 160
 		var v5 uint8 = 161
 		var v6 uint8 = 162
 		var v7 uint8 = 163
 		var v8 uint8 = 164
 		var v9 uint8 = 165
 		v10 := []uint8{v4, v5, v6, v7, v8, v9}
 		v3.SetVectorOfUint8(v10)
 		v1.TheUnion = v3
 		var v11 uint32 = 134678021
 		v1.After = v11

 		encodeSuccessCase{
 			name: "Sandwich6Case1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		var v4 uint8 = 160
 		var v5 uint8 = 161
 		var v6 uint8 = 162
 		var v7 uint8 = 163
 		var v8 uint8 = 164
 		var v9 uint8 = 165
 		v10 := []uint8{v4, v5, v6, v7, v8, v9}
 		v3.SetVectorOfUint8(v10)
 		v1.TheUnion = v3
 		var v11 uint32 = 134678021
 		v1.After = v11

 		encodeSuccessCase{
 			name: "Sandwich6Case1_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		v4 := []uint8{}
 		v3.SetVectorOfUint8(v4)
 		v1.TheUnion = v3
 		var v5 uint32 = 134678021
 		v1.After = v5

 		encodeSuccessCase{
 			name: "Sandwich6Case1AbsentVector",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		v4 := []uint8{}
 		v3.SetVectorOfUint8(v4)
 		v1.TheUnion = v3
 		var v5 uint32 = 134678021
 		v1.After = v5

 		encodeSuccessCase{
 			name: "Sandwich6Case1AbsentVector_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		v4 := "soft migrations rock!"
 		v3.SetString(v4)
 		v1.TheUnion = v3
 		var v5 uint32 = 134678021
 		v1.After = v5

 		encodeSuccessCase{
 			name: "Sandwich6Case2",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x15, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0x73, 0x6f, 0x66, 0x74, 0x20, 0x6d, 0x69, 0x67,
 				0x72, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x20,
 				0x72, 0x6f, 0x63, 0x6b, 0x21, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		v4 := "soft migrations rock!"
 		v3.SetString(v4)
 		v1.TheUnion = v3
 		var v5 uint32 = 134678021
 		v1.After = v5

 		encodeSuccessCase{
 			name: "Sandwich6Case2_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x28, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0x15, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x73, 0x6f, 0x66, 0x74, 0x20, 0x6d, 0x69, 0x67,
 				0x72, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x20,
 				0x72, 0x6f, 0x63, 0x6b, 0x21, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		v4 := conformance.StructSize3Align1{}
 		var v5 uint8 = 115
 		var v6 uint8 = 111
 		var v7 uint8 = 102
 		v8 := [3]uint8{v5, v6, v7}
 		v4.ThreeBytes = v8
 		v9 := conformance.StructSize3Align1{}
 		var v10 uint8 = 32
 		var v11 uint8 = 109
 		var v12 uint8 = 105
 		v13 := [3]uint8{v10, v11, v12}
 		v9.ThreeBytes = v13
 		v14 := conformance.StructSize3Align1{}
 		var v15 uint8 = 114
 		var v16 uint8 = 97
 		var v17 uint8 = 116
 		v18 := [3]uint8{v15, v16, v17}
 		v14.ThreeBytes = v18
 		v19 := []conformance.StructSize3Align1{v4, v9, v14}
 		v3.SetVectorS3A1(v19)
 		v1.TheUnion = v3
 		var v20 uint32 = 134678021
 		v1.After = v20

 		encodeSuccessCase{
 			name: "Sandwich6Case3",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0x73, 0x6f, 0x66, 0x20, 0x6d, 0x69, 0x72, 0x61,
 				0x74, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		v4 := conformance.StructSize3Align1{}
 		var v5 uint8 = 115
 		var v6 uint8 = 111
 		var v7 uint8 = 102
 		v8 := [3]uint8{v5, v6, v7}
 		v4.ThreeBytes = v8
 		v9 := conformance.StructSize3Align1{}
 		var v10 uint8 = 32
 		var v11 uint8 = 109
 		var v12 uint8 = 105
 		v13 := [3]uint8{v10, v11, v12}
 		v9.ThreeBytes = v13
 		v14 := conformance.StructSize3Align1{}
 		var v15 uint8 = 114
 		var v16 uint8 = 97
 		var v17 uint8 = 116
 		v18 := [3]uint8{v15, v16, v17}
 		v14.ThreeBytes = v18
 		v19 := []conformance.StructSize3Align1{v4, v9, v14}
 		v3.SetVectorS3A1(v19)
 		v1.TheUnion = v3
 		var v20 uint32 = 134678021
 		v1.After = v20

 		encodeSuccessCase{
 			name: "Sandwich6Case3_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x73, 0x6f, 0x66, 0x20, 0x6d, 0x69, 0x72, 0x61,
 				0x74, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		v4 := conformance.StructSize3Align2{}
 		var v5 uint16 = 28531
 		v4.F1 = v5
 		var v6 uint8 = 102
 		v4.F2 = v6
 		v7 := conformance.StructSize3Align2{}
 		var v8 uint16 = 27936
 		v7.F1 = v8
 		var v9 uint8 = 105
 		v7.F2 = v9
 		v10 := conformance.StructSize3Align2{}
 		var v11 uint16 = 24946
 		v10.F1 = v11
 		var v12 uint8 = 116
 		v10.F2 = v12
 		v13 := []conformance.StructSize3Align2{v4, v7, v10}
 		v3.SetVectorS3A2(v13)
 		v1.TheUnion = v3
 		var v14 uint32 = 134678021
 		v1.After = v14

 		encodeSuccessCase{
 			name: "Sandwich6Case4",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0x73, 0x6f, 0x66, 0x00, 0x20, 0x6d, 0x69, 0x00,
 				0x72, 0x61, 0x74, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		v4 := conformance.StructSize3Align2{}
 		var v5 uint16 = 28531
 		v4.F1 = v5
 		var v6 uint8 = 102
 		v4.F2 = v6
 		v7 := conformance.StructSize3Align2{}
 		var v8 uint16 = 27936
 		v7.F1 = v8
 		var v9 uint8 = 105
 		v7.F2 = v9
 		v10 := conformance.StructSize3Align2{}
 		var v11 uint16 = 24946
 		v10.F1 = v11
 		var v12 uint8 = 116
 		v10.F2 = v12
 		v13 := []conformance.StructSize3Align2{v4, v7, v10}
 		v3.SetVectorS3A2(v13)
 		v1.TheUnion = v3
 		var v14 uint32 = 134678021
 		v1.After = v14

 		encodeSuccessCase{
 			name: "Sandwich6Case4_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x73, 0x6f, 0x66, 0x00, 0x20, 0x6d, 0x69, 0x00,
 				0x72, 0x61, 0x74, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		var v4 uint32 = 4294967295
 		var v5 uint32 = 4294967295
 		var v6 uint32 = 4294967295
 		v7 := []uint32{v4, v5, v6}
 		v3.SetHandles(v7)
 		v1.TheUnion = v3
 		var v8 uint32 = 134678021
 		v1.After = v8

 		encodeSuccessCase{
 			name: "Sandwich6Case5",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		var v4 uint32 = 4294967295
 		var v5 uint32 = 4294967295
 		var v6 uint32 = 4294967295
 		v7 := []uint32{v4, v5, v6}
 		v3.SetHandles(v7)
 		v1.TheUnion = v3
 		var v8 uint32 = 134678021
 		v1.After = v8

 		encodeSuccessCase{
 			name: "Sandwich6Case5_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		v4 := conformance.StructSize3Align1{}
 		var v5 uint8 = 161
 		var v6 uint8 = 162
 		var v7 uint8 = 163
 		v8 := [3]uint8{v5, v6, v7}
 		v4.ThreeBytes = v8
 		v9 := conformance.StructSize3Align1{}
 		var v10 uint8 = 164
 		var v11 uint8 = 165
 		var v12 uint8 = 166
 		v13 := [3]uint8{v10, v11, v12}
 		v9.ThreeBytes = v13
 		v14 := [2]conformance.StructSize3Align1{v4, v9}
 		v3.SetArrayS3A1(v14)
 		v1.TheUnion = v3
 		var v15 uint32 = 134678021
 		v1.After = v15

 		encodeSuccessCase{
 			name: "Sandwich6Case6",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		v4 := conformance.StructSize3Align1{}
 		var v5 uint8 = 161
 		var v6 uint8 = 162
 		var v7 uint8 = 163
 		v8 := [3]uint8{v5, v6, v7}
 		v4.ThreeBytes = v8
 		v9 := conformance.StructSize3Align1{}
 		var v10 uint8 = 164
 		var v11 uint8 = 165
 		var v12 uint8 = 166
 		v13 := [3]uint8{v10, v11, v12}
 		v9.ThreeBytes = v13
 		v14 := [2]conformance.StructSize3Align1{v4, v9}
 		v3.SetArrayS3A1(v14)
 		v1.TheUnion = v3
 		var v15 uint32 = 134678021
 		v1.After = v15

 		encodeSuccessCase{
 			name: "Sandwich6Case6_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		v4 := conformance.StructSize3Align2{}
 		var v5 uint16 = 41633
 		v4.F1 = v5
 		var v6 uint8 = 163
 		v4.F2 = v6
 		v7 := conformance.StructSize3Align2{}
 		var v8 uint16 = 42404
 		v7.F1 = v8
 		var v9 uint8 = 166
 		v7.F2 = v9
 		v10 := [2]conformance.StructSize3Align2{v4, v7}
 		v3.SetArrayS3A2(v10)
 		v1.TheUnion = v3
 		var v11 uint32 = 134678021
 		v1.After = v11

 		encodeSuccessCase{
 			name: "Sandwich6Case7",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xa1, 0xa2, 0xa3, 0x00, 0xa4, 0xa5, 0xa6, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		v4 := conformance.StructSize3Align2{}
 		var v5 uint16 = 41633
 		v4.F1 = v5
 		var v6 uint8 = 163
 		v4.F2 = v6
 		v7 := conformance.StructSize3Align2{}
 		var v8 uint16 = 42404
 		v7.F1 = v8
 		var v9 uint8 = 166
 		v7.F2 = v9
 		v10 := [2]conformance.StructSize3Align2{v4, v7}
 		v3.SetArrayS3A2(v10)
 		v1.TheUnion = v3
 		var v11 uint32 = 134678021
 		v1.After = v11

 		encodeSuccessCase{
 			name: "Sandwich6Case7_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0xa1, 0xa2, 0xa3, 0x00, 0xa4, 0xa5, 0xa6, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		v4 := conformance.UnionSize8Align4{}
 		var v5 uint32 = 202050057
 		v4.SetVariant(v5)
 		v6 := []conformance.UnionSize8Align4{v4}
 		v3.SetVectorUnion(v6)
 		v1.TheUnion = v3
 		var v7 uint32 = 134678021
 		v1.After = v7

 		encodeSuccessCase{
 			name: "Sandwich6Case8",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0x02, 0x00, 0x00, 0x00, 0x09, 0x0a, 0x0b, 0x0c,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		v4 := conformance.UnionSize8Align4{}
 		var v5 uint32 = 202050057
 		v4.SetVariant(v5)
 		v6 := []conformance.UnionSize8Align4{v4}
 		v3.SetVectorUnion(v6)
 		v1.TheUnion = v3
 		var v7 uint32 = 134678021
 		v1.After = v7

 		encodeSuccessCase{
 			name: "Sandwich6Case8_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x09, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x30, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x09, 0x0a, 0x0b, 0x0c, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.TableStructWithReservedSandwichStruct{}
 		v2 := conformance.TableStructWithReservedSandwich{}
 		v3 := conformance.StructSize3Align1{}
 		var v4 uint8 = 9
 		var v5 uint8 = 10
 		var v6 uint8 = 11
 		v7 := [3]uint8{v4, v5, v6}
 		v3.ThreeBytes = v7
 		v2.SetS1(v3)
 		v8 := conformance.StructSize3Align1{}
 		var v9 uint8 = 25
 		var v10 uint8 = 26
 		var v11 uint8 = 27
 		v12 := [3]uint8{v9, v10, v11}
 		v8.ThreeBytes = v12
 		v2.SetS2(v8)
 		v1.Table = v2

 		encodeSuccessCase{
 			name: "Table_StructWithReservedSandwich",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x09, 0x0a, 0x0b, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x19, 0x1a, 0x1b, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.TableStructWithReservedSandwichStruct{}
 		v2 := conformance.TableStructWithReservedSandwich{}
 		v3 := conformance.StructSize3Align1{}
 		var v4 uint8 = 9
 		var v5 uint8 = 10
 		var v6 uint8 = 11
 		v7 := [3]uint8{v4, v5, v6}
 		v3.ThreeBytes = v7
 		v2.SetS1(v3)
 		v8 := conformance.StructSize3Align1{}
 		var v9 uint8 = 25
 		var v10 uint8 = 26
 		var v11 uint8 = 27
 		v12 := [3]uint8{v9, v10, v11}
 		v8.ThreeBytes = v12
 		v2.SetS2(v8)
 		v1.Table = v2

 		encodeSuccessCase{
 			name: "Table_StructWithReservedSandwich_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x09, 0x0a, 0x0b, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x19, 0x1a, 0x1b, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.TableStructWithUint32SandwichStruct{}
 		v2 := conformance.TableStructWithUint32Sandwich{}
 		var v3 uint32 = 67305985
 		v2.SetI(v3)
 		v4 := conformance.StructSize3Align1{}
 		var v5 uint8 = 9
 		var v6 uint8 = 10
 		var v7 uint8 = 11
 		v8 := [3]uint8{v5, v6, v7}
 		v4.ThreeBytes = v8
 		v2.SetS1(v4)
 		v9 := conformance.StructSize3Align1{}
 		var v10 uint8 = 25
 		var v11 uint8 = 26
 		var v12 uint8 = 27
 		v13 := [3]uint8{v10, v11, v12}
 		v9.ThreeBytes = v13
 		v2.SetS2(v9)
 		var v14 uint32 = 218893066
 		v2.SetI2(v14)
 		v1.Table = v2

 		encodeSuccessCase{
 			name: "Table_StructWithUint32Sandwich",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x09, 0x0a, 0x0b, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x19, 0x1a, 0x1b, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x0a, 0x0b, 0x0c, 0x0d, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.TableStructWithUint32SandwichStruct{}
 		v2 := conformance.TableStructWithUint32Sandwich{}
 		var v3 uint32 = 67305985
 		v2.SetI(v3)
 		v4 := conformance.StructSize3Align1{}
 		var v5 uint8 = 9
 		var v6 uint8 = 10
 		var v7 uint8 = 11
 		v8 := [3]uint8{v5, v6, v7}
 		v4.ThreeBytes = v8
 		v2.SetS1(v4)
 		v9 := conformance.StructSize3Align1{}
 		var v10 uint8 = 25
 		var v11 uint8 = 26
 		var v12 uint8 = 27
 		v13 := [3]uint8{v10, v11, v12}
 		v9.ThreeBytes = v13
 		v2.SetS2(v9)
 		var v14 uint32 = 218893066
 		v2.SetI2(v14)
 		v1.Table = v2

 		encodeSuccessCase{
 			name: "Table_StructWithUint32Sandwich_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x09, 0x0a, 0x0b, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x19, 0x1a, 0x1b, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x0a, 0x0b, 0x0c, 0x0d, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.TableUnionWithVectorReservedSandwichStruct{}
 		v2 := conformance.TableUnionWithVectorReservedSandwich{}
 		v3 := conformance.UnionWithVector{}
 		v4 := "hello"
 		v3.SetString(v4)
 		v2.SetUv(v3)
 		v1.Table = v2

 		encodeSuccessCase{
 			name: "Table_UnionWithVector_ReservedSandwich",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.TableUnionWithVectorReservedSandwichStruct{}
 		v2 := conformance.TableUnionWithVectorReservedSandwich{}
 		v3 := conformance.UnionWithVector{}
 		v4 := "hello"
 		v3.SetString(v4)
 		v2.SetUv(v3)
 		v1.Table = v2

 		encodeSuccessCase{
 			name: "Table_UnionWithVector_ReservedSandwich_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x30, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.TableUnionWithVectorStructSandwichStruct{}
 		v2 := conformance.TableUnionWithVectorStructSandwich{}
 		v3 := conformance.StructSize3Align1{}
 		var v4 uint8 = 1
 		var v5 uint8 = 2
 		var v6 uint8 = 3
 		v7 := [3]uint8{v4, v5, v6}
 		v3.ThreeBytes = v7
 		v2.SetS1(v3)
 		v8 := conformance.UnionWithVector{}
 		v9 := "hello"
 		v8.SetString(v9)
 		v2.SetUv(v8)
 		v10 := conformance.StructSize3Align1{}
 		var v11 uint8 = 4
 		var v12 uint8 = 5
 		var v13 uint8 = 6
 		v14 := [3]uint8{v11, v12, v13}
 		v10.ThreeBytes = v14
 		v2.SetS2(v10)
 		v1.Table = v2

 		encodeSuccessCase{
 			name: "Table_UnionWithVector_StructSandwich",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x02, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x00, 0x00, 0x00,
 				0x04, 0x05, 0x06, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.TableUnionWithVectorStructSandwichStruct{}
 		v2 := conformance.TableUnionWithVectorStructSandwich{}
 		v3 := conformance.StructSize3Align1{}
 		var v4 uint8 = 1
 		var v5 uint8 = 2
 		var v6 uint8 = 3
 		v7 := [3]uint8{v4, v5, v6}
 		v3.ThreeBytes = v7
 		v2.SetS1(v3)
 		v8 := conformance.UnionWithVector{}
 		v9 := "hello"
 		v8.SetString(v9)
 		v2.SetUv(v8)
 		v10 := conformance.StructSize3Align1{}
 		var v11 uint8 = 4
 		var v12 uint8 = 5
 		var v13 uint8 = 6
 		v14 := [3]uint8{v11, v12, v13}
 		v10.ThreeBytes = v14
 		v2.SetS2(v10)
 		v1.Table = v2

 		encodeSuccessCase{
 			name: "Table_UnionWithVector_StructSandwich_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x30, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x02, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x00, 0x00, 0x00,
 				0x04, 0x05, 0x06, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.XUnionWithStructStruct{}
 		v2 := conformance.XUnionWithStruct{}
 		v3 := conformance.StructSize3Align1{}
 		var v4 uint8 = 1
 		var v5 uint8 = 2
 		var v6 uint8 = 3
 		v7 := [3]uint8{v4, v5, v6}
 		v3.ThreeBytes = v7
 		v2.SetS(v3)
 		v1.Xu = v2

 		encodeSuccessCase{
 			name: "XUnionWithStruct",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x14, 0x5c, 0x3e, 0x19, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x02, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.XUnionWithStructStruct{}
 		v2 := conformance.XUnionWithStruct{}
 		v3 := conformance.StructSize3Align1{}
 		var v4 uint8 = 1
 		var v5 uint8 = 2
 		var v6 uint8 = 3
 		v7 := [3]uint8{v4, v5, v6}
 		v3.ThreeBytes = v7
 		v2.SetS(v3)
 		v1.Xu = v2

 		encodeSuccessCase{
 			name: "XUnionWithStruct_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x14, 0x5c, 0x3e, 0x19, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x02, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.ArrayStruct{}
 		v2 := conformance.StringUnion{}
 		v3 := "one"
 		v2.SetS(v3)
 		v4 := conformance.StringUnion{}
 		v5 := "two"
 		v4.SetS(v5)
 		v6 := conformance.StringUnion{}
 		v7 := "three"
 		v6.SetS(v7)
 		v8 := [3]conformance.StringUnion{v2, v4, v6}
 		v1.Unions = v8
 		v9 := &conformance.StringUnion{}
 		v10 := "four"
 		v9.SetS(v10)
 		v11 := &conformance.StringUnion{}
 		v12 := "five"
 		v11.SetS(v12)
 		v13 := &conformance.StringUnion{}
 		v14 := "six"
 		v13.SetS(v14)
 		v15 := [3]*conformance.StringUnion{v9, v11, v13}
 		v1.OptionalUnions = v15

 		encodeSuccessCase{
 			name: "ArrayStruct",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x6f, 0x6e, 0x65, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x74, 0x77, 0x6f, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x74, 0x68, 0x72, 0x65, 0x65, 0x00, 0x00, 0x00,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x66, 0x6f, 0x75, 0x72, 0x00, 0x00, 0x00, 0x00,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x66, 0x69, 0x76, 0x65, 0x00, 0x00, 0x00, 0x00,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x73, 0x69, 0x78, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.ArrayStruct{}
 		v2 := conformance.StringUnion{}
 		v3 := "one"
 		v2.SetS(v3)
 		v4 := conformance.StringUnion{}
 		v5 := "two"
 		v4.SetS(v5)
 		v6 := conformance.StringUnion{}
 		v7 := "three"
 		v6.SetS(v7)
 		v8 := [3]conformance.StringUnion{v2, v4, v6}
 		v1.Unions = v8
 		v9 := &conformance.StringUnion{}
 		v10 := "four"
 		v9.SetS(v10)
 		v11 := &conformance.StringUnion{}
 		v12 := "five"
 		v11.SetS(v12)
 		v13 := &conformance.StringUnion{}
 		v14 := "six"
 		v13.SetS(v14)
 		v15 := [3]*conformance.StringUnion{v9, v11, v13}
 		v1.OptionalUnions = v15

 		encodeSuccessCase{
 			name: "ArrayStruct_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x6f, 0x6e, 0x65, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x74, 0x77, 0x6f, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x74, 0x68, 0x72, 0x65, 0x65, 0x00, 0x00, 0x00,
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x66, 0x6f, 0x75, 0x72, 0x00, 0x00, 0x00, 0x00,
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x66, 0x69, 0x76, 0x65, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x73, 0x69, 0x78, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Regression1{}
 		var v2 uint8 = 1
 		v1.F1 = v2
 		var v3 uint32 = 2
 		v1.F2 = v3
 		var v4 uint8 = 3
 		v1.F3 = v4
 		var v5 uint16 = 4
 		v1.F4 = v5
 		var v6 uint64 = 5
 		v1.F5 = v6
 		var v7 uint8 = 6
 		v1.F6 = v7

 		encodeSuccessCase{
 			name: "Regression1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Regression1{}
 		var v2 uint8 = 1
 		v1.F1 = v2
 		var v3 uint32 = 2
 		v1.F2 = v3
 		var v4 uint8 = 3
 		v1.F3 = v4
 		var v5 uint16 = 4
 		v1.F4 = v5
 		var v6 uint64 = 5
 		v1.F5 = v6
 		var v7 uint8 = 6
 		v1.F6 = v7

 		encodeSuccessCase{
 			name: "Regression1_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Regression2{}
 		v2 := conformance.Regression1{}
 		var v3 uint8 = 1
 		v2.F1 = v3
 		var v4 uint32 = 2
 		v2.F2 = v4
 		var v5 uint8 = 3
 		v2.F3 = v5
 		var v6 uint16 = 4
 		v2.F4 = v6
 		var v7 uint64 = 5
 		v2.F5 = v7
 		var v8 uint8 = 6
 		v2.F6 = v8
 		v1.Head = v2
 		var v9 uint8 = 7
 		v1.F7 = v9

 		encodeSuccessCase{
 			name: "Regression2",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Regression2{}
 		v2 := conformance.Regression1{}
 		var v3 uint8 = 1
 		v2.F1 = v3
 		var v4 uint32 = 2
 		v2.F2 = v4
 		var v5 uint8 = 3
 		v2.F3 = v5
 		var v6 uint16 = 4
 		v2.F4 = v6
 		var v7 uint64 = 5
 		v2.F5 = v7
 		var v8 uint8 = 6
 		v2.F6 = v8
 		v1.Head = v2
 		var v9 uint8 = 7
 		v1.F7 = v9

 		encodeSuccessCase{
 			name: "Regression2_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Regression3{}

 		encodeSuccessCase{
 			name: "Regression3Absent",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Regression3{}

 		encodeSuccessCase{
 			name: "Regression3Absent_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Regression3{}
 		v2 := &conformance.Regression2{}
 		v3 := conformance.Regression1{}
 		var v4 uint8 = 1
 		v3.F1 = v4
 		var v5 uint32 = 2
 		v3.F2 = v5
 		var v6 uint8 = 3
 		v3.F3 = v6
 		var v7 uint16 = 4
 		v3.F4 = v7
 		var v8 uint64 = 5
 		v3.F5 = v8
 		var v9 uint8 = 6
 		v3.F6 = v9
 		v2.Head = v3
 		var v10 uint8 = 7
 		v2.F7 = v10
 		v1.OptValue = v2

 		encodeSuccessCase{
 			name: "Regression3Present",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Regression3{}
 		v2 := &conformance.Regression2{}
 		v3 := conformance.Regression1{}
 		var v4 uint8 = 1
 		v3.F1 = v4
 		var v5 uint32 = 2
 		v3.F2 = v5
 		var v6 uint8 = 3
 		v3.F3 = v6
 		var v7 uint16 = 4
 		v3.F4 = v7
 		var v8 uint64 = 5
 		v3.F5 = v8
 		var v9 uint8 = 6
 		v3.F6 = v9
 		v2.Head = v3
 		var v10 uint8 = 7
 		v2.F7 = v10
 		v1.OptValue = v2

 		encodeSuccessCase{
 			name: "Regression3Present_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.UnionWithBoundStringStruct{}
 		v2 := conformance.UnionWithBoundString{}
 		v3 := "abcd"
 		v2.SetBoundFiveStr(v3)
 		v1.V = v2

 		encodeSuccessCase{
 			name: "UnionWithBoundString",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x61, 0x62, 0x63, 0x64, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.SingleVariantUnionStruct{}
 		v2 := conformance.SingleVariantUnion{}
 		var v3 uint32 = 42
 		v2.SetX(v3)
 		v1.U = v2

 		encodeSuccessCase{
 			name: "UnionMigration_SingleVariant",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x2a, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.SingleVariantUnionStruct{}
 		v2 := conformance.SingleVariantUnion{}
 		var v3 uint32 = 42
 		v2.SetX(v3)
 		v1.U = v2

 		encodeSuccessCase{
 			name: "UnionMigration_SingleVariant_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x2a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.SandwichUnionSize8Alignment4{}
 		var v2 uint32 = 10
 		v1.Before = v2
 		v3 := conformance.UnionSize8Alignment4{}
 		var v4 uint32 = 4
 		v3.SetVariant(v4)
 		v1.Value = v3
 		var v5 uint32 = 20
 		v1.After = v5

 		encodeSuccessCase{
 			name: "UnionSize8Alignment4",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x0a, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
 				0x04, 0x00, 0x00, 0x00, 0x14, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.SandwichUnionSize8Alignment4{}
 		var v2 uint32 = 10
 		v1.Before = v2
 		v3 := conformance.UnionSize8Alignment4{}
 		var v4 uint32 = 4
 		v3.SetVariant(v4)
 		v1.Value = v3
 		var v5 uint32 = 20
 		v1.After = v5

 		encodeSuccessCase{
 			name: "UnionSize8Alignment4_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.SandwichUnionSize12Alignment4{}
 		var v2 uint32 = 10
 		v1.Before = v2
 		v3 := conformance.UnionSize12Alignment4{}
 		var v4 uint8 = 1
 		var v5 uint8 = 2
 		var v6 uint8 = 3
 		var v7 uint8 = 4
 		var v8 uint8 = 5
 		var v9 uint8 = 6
 		v10 := [6]uint8{v4, v5, v6, v7, v8, v9}
 		v3.SetVariant(v10)
 		v1.Value = v3
 		var v11 uint32 = 20
 		v1.After = v11

 		encodeSuccessCase{
 			name: "UnionSize12Alignment4",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x0a, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00,
 				0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x00, 0x00,
 				0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.SandwichUnionSize12Alignment4{}
 		var v2 uint32 = 10
 		v1.Before = v2
 		v3 := conformance.UnionSize12Alignment4{}
 		var v4 uint8 = 1
 		var v5 uint8 = 2
 		var v6 uint8 = 3
 		var v7 uint8 = 4
 		var v8 uint8 = 5
 		var v9 uint8 = 6
 		v10 := [6]uint8{v4, v5, v6, v7, v8, v9}
 		v3.SetVariant(v10)
 		v1.Value = v3
 		var v11 uint32 = 20
 		v1.After = v11

 		encodeSuccessCase{
 			name: "UnionSize12Alignment4_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.SandwichUnionSize24Alignment8{}
 		var v2 uint32 = 10
 		v1.Before = v2
 		v3 := conformance.UnionSize24Alignment8{}
 		v4 := conformance.StructSize16Alignment8{}
 		var v5 uint64 = 1
 		v4.F1 = v5
 		var v6 uint64 = 2
 		v4.F2 = v6
 		v3.SetVariant(v4)
 		v1.Value = v3
 		var v7 uint32 = 20
 		v1.After = v7

 		encodeSuccessCase{
 			name: "UnionSize24Alignment8",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.SandwichUnionSize24Alignment8{}
 		var v2 uint32 = 10
 		v1.Before = v2
 		v3 := conformance.UnionSize24Alignment8{}
 		v4 := conformance.StructSize16Alignment8{}
 		var v5 uint64 = 1
 		v4.F1 = v5
 		var v6 uint64 = 2
 		v4.F2 = v6
 		v3.SetVariant(v4)
 		v1.Value = v3
 		var v7 uint32 = 20
 		v1.After = v7

 		encodeSuccessCase{
 			name: "UnionSize24Alignment8_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.SandwichUnionSize36Alignment4{}
 		var v2 uint32 = 10
 		v1.Before = v2
 		v3 := conformance.UnionSize36Alignment4{}
 		var v4 uint8 = 1
 		var v5 uint8 = 2
 		var v6 uint8 = 3
 		var v7 uint8 = 4
 		var v8 uint8 = 5
 		var v9 uint8 = 6
 		var v10 uint8 = 7
 		var v11 uint8 = 8
 		var v12 uint8 = 9
 		var v13 uint8 = 10
 		var v14 uint8 = 11
 		var v15 uint8 = 12
 		var v16 uint8 = 13
 		var v17 uint8 = 14
 		var v18 uint8 = 15
 		var v19 uint8 = 16
 		var v20 uint8 = 17
 		var v21 uint8 = 18
 		var v22 uint8 = 19
 		var v23 uint8 = 20
 		var v24 uint8 = 21
 		var v25 uint8 = 22
 		var v26 uint8 = 23
 		var v27 uint8 = 24
 		var v28 uint8 = 25
 		var v29 uint8 = 26
 		var v30 uint8 = 27
 		var v31 uint8 = 28
 		var v32 uint8 = 29
 		var v33 uint8 = 30
 		var v34 uint8 = 31
 		var v35 uint8 = 32
 		v36 := [32]uint8{v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35}
 		v3.SetVariant(v36)
 		v1.Value = v3
 		var v37 uint32 = 20
 		v1.After = v37

 		encodeSuccessCase{
 			name: "UnionSize36Alignment4",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x0a, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00,
 				0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
 				0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10,
 				0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18,
 				0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20,
 				0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.SandwichUnionSize36Alignment4{}
 		var v2 uint32 = 10
 		v1.Before = v2
 		v3 := conformance.UnionSize36Alignment4{}
 		var v4 uint8 = 1
 		var v5 uint8 = 2
 		var v6 uint8 = 3
 		var v7 uint8 = 4
 		var v8 uint8 = 5
 		var v9 uint8 = 6
 		var v10 uint8 = 7
 		var v11 uint8 = 8
 		var v12 uint8 = 9
 		var v13 uint8 = 10
 		var v14 uint8 = 11
 		var v15 uint8 = 12
 		var v16 uint8 = 13
 		var v17 uint8 = 14
 		var v18 uint8 = 15
 		var v19 uint8 = 16
 		var v20 uint8 = 17
 		var v21 uint8 = 18
 		var v22 uint8 = 19
 		var v23 uint8 = 20
 		var v24 uint8 = 21
 		var v25 uint8 = 22
 		var v26 uint8 = 23
 		var v27 uint8 = 24
 		var v28 uint8 = 25
 		var v29 uint8 = 26
 		var v30 uint8 = 27
 		var v31 uint8 = 28
 		var v32 uint8 = 29
 		var v33 uint8 = 30
 		var v34 uint8 = 31
 		var v35 uint8 = 32
 		v36 := [32]uint8{v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35}
 		v3.SetVariant(v36)
 		v1.Value = v3
 		var v37 uint32 = 20
 		v1.After = v37

 		encodeSuccessCase{
 			name: "UnionSize36Alignment4_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
 				0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10,
 				0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18,
 				0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20,
 			},
 		}.check(t)
 	}

 }

 func TestAllDecodeSuccessCases(t *testing.T) {

 	{
 		v1 := conformance.ThreeByteInStruct{}
 		v2 := conformance.ThreeByte{}
 		var v3 uint8 = 1
 		v2.Elem1 = v3
 		var v4 uint8 = 2
 		v2.Elem2 = v4
 		var v5 uint8 = 3
 		v2.Elem3 = v5
 		v1.Elem1 = v2
 		v6 := conformance.ThreeByte{}
 		var v7 uint8 = 4
 		v6.Elem1 = v7
 		var v8 uint8 = 5
 		v6.Elem2 = v8
 		var v9 uint8 = 6
 		v6.Elem3 = v9
 		v1.Elem2 = v6
 		v10 := conformance.ThreeByte{}
 		var v11 uint8 = 7
 		v10.Elem1 = v11
 		var v12 uint8 = 8
 		v10.Elem2 = v12
 		var v13 uint8 = 9
 		v10.Elem3 = v13
 		v1.Elem3 = v10

 		decodeSuccessCase{
 			name: "3ByteObjectAlignmentInStruct",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
 				0x09, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.FiveByteInStruct{}
 		v2 := conformance.FiveByte{}
 		var v3 uint32 = 16909060
 		v2.Elem1 = v3
 		var v4 uint8 = 5
 		v2.Elem2 = v4
 		v1.Elem1 = v2
 		v5 := conformance.FiveByte{}
 		var v6 uint32 = 101124105
 		v5.Elem1 = v6
 		var v7 uint8 = 10
 		v5.Elem2 = v7
 		v1.Elem2 = v5
 		v8 := conformance.FiveByte{}
 		var v9 uint32 = 185339150
 		v8.Elem1 = v9
 		var v10 uint8 = 15
 		v8.Elem2 = v10
 		v1.Elem3 = v8

 		decodeSuccessCase{
 			name: "5ByteObjectAlignmentInStruct",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x04, 0x03, 0x02, 0x01, 0x05, 0x00, 0x00, 0x00,
 				0x09, 0x08, 0x07, 0x06, 0x0a, 0x00, 0x00, 0x00,
 				0x0e, 0x0d, 0x0c, 0x0b, 0x0f, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.ThreeByteInVector{}
 		v2 := conformance.ThreeByte{}
 		var v3 uint8 = 1
 		v2.Elem1 = v3
 		var v4 uint8 = 2
 		v2.Elem2 = v4
 		var v5 uint8 = 3
 		v2.Elem3 = v5
 		v6 := conformance.ThreeByte{}
 		var v7 uint8 = 4
 		v6.Elem1 = v7
 		var v8 uint8 = 5
 		v6.Elem2 = v8
 		var v9 uint8 = 6
 		v6.Elem3 = v9
 		v10 := conformance.ThreeByte{}
 		var v11 uint8 = 7
 		v10.Elem1 = v11
 		var v12 uint8 = 8
 		v10.Elem2 = v12
 		var v13 uint8 = 9
 		v10.Elem3 = v13
 		v14 := []conformance.ThreeByte{v2, v6, v10}
 		v1.Elems = v14

 		decodeSuccessCase{
 			name: "3ByteObjectAlignmentInVector",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
 				0x09, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.FiveByteInVector{}
 		v2 := conformance.FiveByte{}
 		var v3 uint32 = 16909060
 		v2.Elem1 = v3
 		var v4 uint8 = 5
 		v2.Elem2 = v4
 		v5 := conformance.FiveByte{}
 		var v6 uint32 = 101124105
 		v5.Elem1 = v6
 		var v7 uint8 = 10
 		v5.Elem2 = v7
 		v8 := conformance.FiveByte{}
 		var v9 uint32 = 185339150
 		v8.Elem1 = v9
 		var v10 uint8 = 15
 		v8.Elem2 = v10
 		v11 := []conformance.FiveByte{v2, v5, v8}
 		v1.Elems = v11

 		decodeSuccessCase{
 			name: "5ByteObjectAlignmentInVector",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x04, 0x03, 0x02, 0x01, 0x05, 0x00, 0x00, 0x00,
 				0x09, 0x08, 0x07, 0x06, 0x0a, 0x00, 0x00, 0x00,
 				0x0e, 0x0d, 0x0c, 0x0b, 0x0f, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.ThreeByteInArray{}
 		v2 := conformance.ThreeByte{}
 		var v3 uint8 = 1
 		v2.Elem1 = v3
 		var v4 uint8 = 2
 		v2.Elem2 = v4
 		var v5 uint8 = 3
 		v2.Elem3 = v5
 		v6 := conformance.ThreeByte{}
 		var v7 uint8 = 4
 		v6.Elem1 = v7
 		var v8 uint8 = 5
 		v6.Elem2 = v8
 		var v9 uint8 = 6
 		v6.Elem3 = v9
 		v10 := conformance.ThreeByte{}
 		var v11 uint8 = 7
 		v10.Elem1 = v11
 		var v12 uint8 = 8
 		v10.Elem2 = v12
 		var v13 uint8 = 9
 		v10.Elem3 = v13
 		v14 := [3]conformance.ThreeByte{v2, v6, v10}
 		v1.Elems = v14

 		decodeSuccessCase{
 			name: "3ByteObjectAlignmentInArray",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
 				0x09, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.FiveByteInArray{}
 		v2 := conformance.FiveByte{}
 		var v3 uint32 = 16909060
 		v2.Elem1 = v3
 		var v4 uint8 = 5
 		v2.Elem2 = v4
 		v5 := conformance.FiveByte{}
 		var v6 uint32 = 101124105
 		v5.Elem1 = v6
 		var v7 uint8 = 10
 		v5.Elem2 = v7
 		v8 := conformance.FiveByte{}
 		var v9 uint32 = 185339150
 		v8.Elem1 = v9
 		var v10 uint8 = 15
 		v8.Elem2 = v10
 		v11 := [3]conformance.FiveByte{v2, v5, v8}
 		v1.Elems = v11

 		decodeSuccessCase{
 			name: "5ByteObjectAlignmentInArray",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x04, 0x03, 0x02, 0x01, 0x05, 0x00, 0x00, 0x00,
 				0x09, 0x08, 0x07, 0x06, 0x0a, 0x00, 0x00, 0x00,
 				0x0e, 0x0d, 0x0c, 0x0b, 0x0f, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.EmptyStruct{}

 		decodeSuccessCase{
 			name: "EmptyStruct",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.EmptyStructSandwich{}
 		v2 := "before"
 		v1.Before = v2
 		v3 := conformance.EmptyStruct{}
 		v1.Es = v3
 		v4 := "after"
 		v1.After = v4

 		decodeSuccessCase{
 			name: "EmptyStructSandwich",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x62, 0x65, 0x66, 0x6f, 0x72, 0x65, 0x00, 0x00,
 				0x61, 0x66, 0x74, 0x65, 0x72, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Uint8Uint16Uint32Uint64{}
 		var v2 uint8 = 1
 		v1.F1 = v2
 		var v3 uint16 = 515
 		v1.F2 = v3
 		var v4 uint32 = 67438087
 		v1.F3 = v4
 		var v5 uint64 = 579005069656919567
 		v1.F4 = v5

 		decodeSuccessCase{
 			name: "Uint8Uint16Uint32Uint64",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x00, 0x03, 0x02, 0x07, 0x06, 0x05, 0x04,
 				0x0f, 0x0e, 0x0d, 0x0c, 0x0b, 0x0a, 0x09, 0x08,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Uint64Uint32Uint16Uint8{}
 		var v2 uint64 = 579005069656919567
 		v1.F1 = v2
 		var v3 uint32 = 67438087
 		v1.F2 = v3
 		var v4 uint16 = 515
 		v1.F3 = v4
 		var v5 uint8 = 1
 		v1.F4 = v5

 		decodeSuccessCase{
 			name: "Uint64Uint32Uint16Uint8",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x0f, 0x0e, 0x0d, 0x0c, 0x0b, 0x0a, 0x09, 0x08,
 				0x07, 0x06, 0x05, 0x04, 0x03, 0x02, 0x01, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.StructOfSimpleTable{}
 		v2 := conformance.SimpleTable{}
 		v1.Table = v2

 		decodeSuccessCase{
 			name: "SimpleTableEmpty",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.StructOfSimpleTable{}
 		v2 := conformance.SimpleTable{}
 		var v3 int64 = 42
 		v2.SetX(v3)
 		var v4 int64 = 67
 		v2.SetY(v4)
 		v1.Table = v2

 		decodeSuccessCase{
 			name: "SimpleTableXAndY",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x2a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x43, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.StructOfSimpleTable{}
 		v2 := conformance.SimpleTable{}
 		var v3 int64 = 67
 		v2.SetY(v3)
 		v1.Table = v2

 		decodeSuccessCase{
 			name: "SimpleTableJustY",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x43, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.StructOfTableWithStringAndVector{}
 		v2 := conformance.TableWithStringAndVector{}
 		v3 := "hello"
 		v2.SetFoo(v3)
 		var v4 int32 = 27
 		v2.SetBar(v4)
 		v1.Table = v2

 		decodeSuccessCase{
 			name: "TableWithStringAndVectorNoVectorContent",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x00, 0x00, 0x00,
 				0x1b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.SimpleTableThenUint64{}
 		v2 := conformance.SimpleTable{}
 		var v3 int64 = 42
 		v2.SetX(v3)
 		var v4 int64 = 67
 		v2.SetY(v4)
 		v1.Table = v2
 		var v5 uint64 = 16045690984833335023
 		v1.Number = v5

 		decodeSuccessCase{
 			name: "SimpleTableThenUint64",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0xef, 0xbe, 0xad, 0xde, 0xef, 0xbe, 0xad, 0xde,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x2a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x43, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.TestInlineXUnionInStruct{}
 		v2 := "before"
 		v1.Before = v2
 		v3 := conformance.SampleXUnion{}
 		var v4 uint32 = 3735928559
 		v3.SetU(v4)
 		v1.Xu = v3
 		v5 := "after"
 		v1.After = v5

 		decodeSuccessCase{
 			name: "InlineXUnionInStruct",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0xb2, 0x56, 0x9c, 0x38, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x62, 0x65, 0x66, 0x6f, 0x72, 0x65, 0x00, 0x00,
 				0xef, 0xbe, 0xad, 0xde, 0x00, 0x00, 0x00, 0x00,
 				0x61, 0x66, 0x74, 0x65, 0x72, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.TestOptionalXUnionInStruct{}
 		v2 := "before"
 		v1.Before = v2
 		v3 := "after"
 		v1.After = v3

 		decodeSuccessCase{
 			name: "OptionalXUnionInStructAbsent",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x62, 0x65, 0x66, 0x6f, 0x72, 0x65, 0x00, 0x00,
 				0x61, 0x66, 0x74, 0x65, 0x72, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.TestOptionalXUnionInStruct{}
 		v2 := "before"
 		v1.Before = v2
 		v3 := &conformance.SampleXUnion{}
 		var v4 uint32 = 3735928559
 		v3.SetU(v4)
 		v1.Xu = v3
 		v5 := "after"
 		v1.After = v5

 		decodeSuccessCase{
 			name: "OptionalXUnionInStructPresent",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0xb2, 0x56, 0x9c, 0x38, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x62, 0x65, 0x66, 0x6f, 0x72, 0x65, 0x00, 0x00,
 				0xef, 0xbe, 0xad, 0xde, 0x00, 0x00, 0x00, 0x00,
 				0x61, 0x66, 0x74, 0x65, 0x72, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.TestXUnionInTable{}
 		v2 := conformance.XUnionInTable{}
 		v3 := "before"
 		v2.SetBefore(v3)
 		v4 := "after"
 		v2.SetAfter(v4)
 		v1.Value = v2

 		decodeSuccessCase{
 			name: "XUnionInTableXUnionAbsent",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x62, 0x65, 0x66, 0x6f, 0x72, 0x65, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x61, 0x66, 0x74, 0x65, 0x72, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.TestXUnionInTable{}
 		v2 := conformance.XUnionInTable{}
 		v3 := "before"
 		v2.SetBefore(v3)
 		v4 := conformance.SampleXUnion{}
 		var v5 uint32 = 3735928559
 		v4.SetU(v5)
 		v2.SetXu(v4)
 		v6 := "after"
 		v2.SetAfter(v6)
 		v1.Value = v2

 		decodeSuccessCase{
 			name: "XUnionInTableXUnionPresent",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x62, 0x65, 0x66, 0x6f, 0x72, 0x65, 0x00, 0x00,
 				0xb2, 0x56, 0x9c, 0x38, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0xef, 0xbe, 0xad, 0xde, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x61, 0x66, 0x74, 0x65, 0x72, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.TestStrictXUnionInStruct{}
 		v2 := conformance.SampleStrictXUnion{}
 		var v3 uint32 = 3735928559
 		v2.SetU(v3)
 		v1.Xu = v2

 		decodeSuccessCase{
 			name: "StrictXUnion",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x72, 0xea, 0xe2, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0xef, 0xbe, 0xad, 0xde, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.TestAddEthernetDeviceRequest{}
 		v2 := "@/dev/sys/pci/00:03.0/e1000/ethernet"
 		v1.TopologicalPath = v2
 		v3 := conformance.InterfaceConfig{}
 		v4 := "ethp0003"
 		v3.Name = v4
 		v5 := conformance.IpAddressConfig{}
 		v6 := true
 		v5.SetDhcp(v6)
 		v3.IpAddressConfig = v5
 		v1.Config = v3
 		var v7 uint32 = 4294967295
 		v1.ThisShouldBeAHandle = v7

 		decodeSuccessCase{
 			name: "AddEthernetDeviceRequest",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x24, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00,
 				0x40, 0x2f, 0x64, 0x65, 0x76, 0x2f, 0x73, 0x79,
 				0x73, 0x2f, 0x70, 0x63, 0x69, 0x2f, 0x30, 0x30,
 				0x3a, 0x30, 0x33, 0x2e, 0x30, 0x2f, 0x65, 0x31,
 				0x30, 0x30, 0x30, 0x2f, 0x65, 0x74, 0x68, 0x65,
 				0x72, 0x6e, 0x65, 0x74, 0x00, 0x00, 0x00, 0x00,
 				0x65, 0x74, 0x68, 0x70, 0x30, 0x30, 0x30, 0x33,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.FileGetAttrResponse{}
 		var v2 int32 = 2125315759
 		v1.S = v2
 		v3 := conformance.NodeAttributes{}
 		var v4 uint32 = 2518909348
 		v3.Mode = v4
 		var v5 uint64 = 1
 		v3.Id = v5
 		var v6 uint64 = 231
 		v3.ContentSize = v6
 		var v7 uint64 = 231
 		v3.StorageSize = v7
 		var v8 uint64 = 1
 		v3.LinkCount = v8
 		var v9 uint64 = 9833440827789222417
 		v3.CreationTime = v9
 		var v10 uint64 = 72038755451251353
 		v3.ModificationTime = v10
 		v1.Attributes = v3

 		decodeSuccessCase{
 			name: "FileGetAttrResponse",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0xaf, 0xbe, 0xad, 0x7e, 0x00, 0x00, 0x00, 0x00,
 				0xa4, 0x81, 0x23, 0x96, 0x00, 0x00, 0x00, 0x00,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xe7, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xe7, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88,
 				0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.StructWithOptionals{}
 		v2 := conformance.EmptyStruct{}
 		v1.S = v2
 		v3 := &conformance.EmptyStruct{}
 		v1.S2 = v3
 		v4 := conformance.TableWithEmptyStruct{}
 		v5 := conformance.EmptyStruct{}
 		v4.SetS(v5)
 		v1.T = v4
 		v6 := conformance.XUnionWithEmptyStruct{}
 		v7 := conformance.EmptyStruct{}
 		v6.SetS(v7)
 		v1.Xu = v6
 		v8 := &conformance.XUnionWithEmptyStruct{}
 		v9 := conformance.EmptyStruct{}
 		v8.SetS(v9)
 		v1.Xu2 = v8
 		v10 := conformance.UnionWithEmptyStruct{}
 		v11 := conformance.EmptyStruct{}
 		v10.SetS(v11)
 		v1.U = v10
 		v12 := &conformance.UnionWithEmptyStruct{}
 		v13 := conformance.EmptyStruct{}
 		v12.SetS(v13)
 		v1.U2 = v12

 		decodeSuccessCase{
 			name: "Optionals",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0xfe, 0xe0, 0x99, 0x74, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0xfe, 0xe0, 0x99, 0x74, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.StructWithArrays{}
 		var v2 int32 = 1
 		var v3 int32 = 2
 		v4 := [2]int32{v2, v3}
 		v1.ArrInt = v4
 		v5 := "a"
 		v6 := "b"
 		v7 := [2]string{v5, v6}
 		v1.ArrString = v7
 		v8 := "c"
 		v9 := &v8
 		var v10 *string = nil
 		v11 := [2]*string{v9, v10}
 		v1.ArrNullableString = v11
 		v12 := conformance.StructWithInt{}
 		var v13 int32 = 1
 		v12.X = v13
 		v14 := conformance.StructWithInt{}
 		var v15 int32 = 2
 		v14.X = v15
 		v16 := [2]conformance.StructWithInt{v12, v14}
 		v1.ArrStruct = v16
 		var v17 *conformance.StructWithInt = nil
 		v18 := &conformance.StructWithInt{}
 		var v19 int32 = 16909060
 		v18.X = v19
 		v20 := [2]*conformance.StructWithInt{v17, v18}
 		v1.ArrNullableStruct = v20
 		var v21 int32 = 1
 		var v22 int32 = 2
 		var v23 int32 = 3
 		v24 := [3]int32{v21, v22, v23}
 		var v25 int32 = 4
 		var v26 int32 = 5
 		var v27 int32 = 6
 		v28 := [3]int32{v25, v26, v27}
 		v29 := [2][3]int32{v24, v28}
 		v1.ArrArrInt = v29

 		decodeSuccessCase{
 			name: "Arrays",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00,
 				0x61, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x62, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x63, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x04, 0x03, 0x02, 0x01, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.StructWithVectors{}
 		v2 := []int32{}
 		v1.VecEmpty = v2
 		var v3 int32 = 1
 		var v4 int32 = 2
 		v5 := []int32{v3, v4}
 		v1.VecInt = v5
 		v6 := "a"
 		v7 := "b"
 		v8 := []string{v6, v7}
 		v1.VecString = v8
 		var v9 *string = nil
 		v10 := "c"
 		v11 := &v10
 		var v12 *string = nil
 		v13 := []*string{v9, v11, v12}
 		v1.VecNullableString = v13
 		v14 := conformance.StructWithInt{}
 		var v15 int32 = 1
 		v14.X = v15
 		v16 := []conformance.StructWithInt{v14}
 		v1.VecStruct = v16
 		var v17 *conformance.StructWithInt = nil
 		var v18 *conformance.StructWithInt = nil
 		v19 := &conformance.StructWithInt{}
 		var v20 int32 = 2
 		v19.X = v20
 		v21 := []*conformance.StructWithInt{v17, v18, v19}
 		v1.VecNullableStruct = v21
 		var v22 int32 = 1
 		var v23 int32 = 2
 		v24 := []int32{v22, v23}
 		var v25 int32 = 3
 		v26 := []int32{v25}
 		v27 := [][]int32{v24, v26}
 		v1.VecVecInt = v27

 		decodeSuccessCase{
 			name: "Vectors",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x61, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x62, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x63, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyBool{}
 		v2 := true
 		v1.Value = v2

 		decodeSuccessCase{
 			name: "BoolTrue",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyBool{}
 		v2 := false
 		v1.Value = v2

 		decodeSuccessCase{
 			name: "BoolFalse",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyByte{}
 		var v2 uint8 = 0
 		v1.Value = v2

 		decodeSuccessCase{
 			name: "ByteZero",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyByte{}
 		var v2 uint8 = 255
 		v1.Value = v2

 		decodeSuccessCase{
 			name: "Byte255",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyInt8{}
 		var v2 int8 = -128
 		v1.Value = v2

 		decodeSuccessCase{
 			name: "Int8Min",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyInt8{}
 		var v2 int8 = 0
 		v1.Value = v2

 		decodeSuccessCase{
 			name: "Int8Zero",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyInt8{}
 		var v2 int8 = 127
 		v1.Value = v2

 		decodeSuccessCase{
 			name: "Int8Max",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x7f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyInt16{}
 		var v2 int16 = -32768
 		v1.Value = v2

 		decodeSuccessCase{
 			name: "Int16Min",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyInt16{}
 		var v2 int16 = 0
 		v1.Value = v2

 		decodeSuccessCase{
 			name: "Int16Zero",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyInt16{}
 		var v2 int16 = 32767
 		v1.Value = v2

 		decodeSuccessCase{
 			name: "Int16Max",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0xff, 0x7f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyInt32{}
 		var v2 int32 = -2147483648
 		v1.Value = v2

 		decodeSuccessCase{
 			name: "Int32Min",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyInt32{}
 		var v2 int32 = 0
 		v1.Value = v2

 		decodeSuccessCase{
 			name: "Int32Zero",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyInt32{}
 		var v2 int32 = 2147483647
 		v1.Value = v2

 		decodeSuccessCase{
 			name: "Int32Max",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0xff, 0xff, 0xff, 0x7f, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyInt64{}
 		var v2 int64 = -9223372036854775808
 		v1.Value = v2

 		decodeSuccessCase{
 			name: "Int64Min",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyInt64{}
 		var v2 int64 = 0
 		v1.Value = v2

 		decodeSuccessCase{
 			name: "Int64Zero",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyInt64{}
 		var v2 int64 = 9223372036854775807
 		v1.Value = v2

 		decodeSuccessCase{
 			name: "Int64Max",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x7f,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyUint8{}
 		var v2 uint8 = 0
 		v1.Value = v2

 		decodeSuccessCase{
 			name: "Uint8Zero",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyUint8{}
 		var v2 uint8 = 255
 		v1.Value = v2

 		decodeSuccessCase{
 			name: "Uint8Max",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyUint16{}
 		var v2 uint16 = 0
 		v1.Value = v2

 		decodeSuccessCase{
 			name: "Uint16Zero",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyUint16{}
 		var v2 uint16 = 65535
 		v1.Value = v2

 		decodeSuccessCase{
 			name: "Uint16Max",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyUint32{}
 		var v2 uint32 = 0
 		v1.Value = v2

 		decodeSuccessCase{
 			name: "Uint32Zero",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyUint32{}
 		var v2 uint32 = 4294967295
 		v1.Value = v2

 		decodeSuccessCase{
 			name: "Uint32Max",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyUint64{}
 		var v2 uint64 = 0
 		v1.Value = v2

 		decodeSuccessCase{
 			name: "Uint64Zero",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyUint64{}
 		var v2 uint64 = 18446744073709551615
 		v1.Value = v2

 		decodeSuccessCase{
 			name: "Uint64Max",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyFloat32{}
 		var v2 float32 = 0
 		v1.Value = v2

 		decodeSuccessCase{
 			name: "Float32Zero",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyFloat32{}
 		var v2 float32 = 1
 		v1.Value = v2

 		decodeSuccessCase{
 			name: "Float32One",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x80, 0x3f, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyFloat32{}
 		var v2 float32 = -1
 		v1.Value = v2

 		decodeSuccessCase{
 			name: "Float32MinusOne",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x80, 0xbf, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyFloat32{}
 		var v2 float32 = 3.4028234663852886e+38
 		v1.Value = v2

 		decodeSuccessCase{
 			name: "Float32Max",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0xff, 0xff, 0x7f, 0x7f, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyFloat64{}
 		var v2 float64 = 0
 		v1.Value = v2

 		decodeSuccessCase{
 			name: "Float64Zero",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyFloat64{}
 		var v2 float64 = 1
 		v1.Value = v2

 		decodeSuccessCase{
 			name: "Float64One",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf0, 0x3f,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyFloat64{}
 		var v2 float64 = -1
 		v1.Value = v2

 		decodeSuccessCase{
 			name: "Float64MinusOne",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf0, 0xbf,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.MyFloat64{}
 		var v2 float64 = 1.7976931348623157e+308
 		v1.Value = v2

 		decodeSuccessCase{
 			name: "Float64Max",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xef, 0x7f,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich1{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionSize8Align4{}
 		var v4 uint32 = 202050057
 		v3.SetVariant(v4)
 		v1.TheUnion = v3
 		var v5 uint32 = 134678021
 		v1.After = v5

 		decodeSuccessCase{
 			name: "Sandwich1Case1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x02, 0x00, 0x00, 0x00,
 				0x09, 0x0a, 0x0b, 0x0c, 0x05, 0x06, 0x07, 0x08,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich1{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionSize8Align4{}
 		var v4 uint32 = 202050057
 		v3.SetVariant(v4)
 		v1.TheUnion = v3
 		var v5 uint32 = 134678021
 		v1.After = v5

 		decodeSuccessCase{
 			name: "Sandwich1Case1_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0x09, 0x0a, 0x0b, 0x0c, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich2{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionSize12Align4{}
 		var v4 uint8 = 160
 		var v5 uint8 = 161
 		var v6 uint8 = 162
 		var v7 uint8 = 163
 		var v8 uint8 = 164
 		var v9 uint8 = 165
 		v10 := [6]uint8{v4, v5, v6, v7, v8, v9}
 		v3.SetVariant(v10)
 		v1.TheUnion = v3
 		var v11 uint32 = 134678021
 		v1.After = v11

 		decodeSuccessCase{
 			name: "Sandwich2Case1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x03, 0x00, 0x00, 0x00,
 				0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0x00, 0x00,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich2{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionSize12Align4{}
 		var v4 uint8 = 160
 		var v5 uint8 = 161
 		var v6 uint8 = 162
 		var v7 uint8 = 163
 		var v8 uint8 = 164
 		var v9 uint8 = 165
 		v10 := [6]uint8{v4, v5, v6, v7, v8, v9}
 		v3.SetVariant(v10)
 		v1.TheUnion = v3
 		var v11 uint32 = 134678021
 		v1.After = v11

 		decodeSuccessCase{
 			name: "Sandwich2Case1_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich3{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionSize24Align8{}
 		v4 := conformance.StructSize16Align8{}
 		var v5 uint64 = 12080525177006498208
 		v4.F1 = v5
 		var v6 uint64 = 12659246559711111592
 		v4.F2 = v6
 		v3.SetVariant(v4)
 		v1.TheUnion = v3
 		var v7 uint32 = 134678021
 		v1.After = v7

 		decodeSuccessCase{
 			name: "Sandwich3Case1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
 				0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich3{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionSize24Align8{}
 		v4 := conformance.StructSize16Align8{}
 		var v5 uint64 = 12080525177006498208
 		v4.F1 = v5
 		var v6 uint64 = 12659246559711111592
 		v4.F2 = v6
 		v3.SetVariant(v4)
 		v1.TheUnion = v3
 		var v7 uint32 = 134678021
 		v1.After = v7

 		decodeSuccessCase{
 			name: "Sandwich3Case1_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
 				0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich4{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionSize36Align4{}
 		var v4 uint8 = 160
 		var v5 uint8 = 161
 		var v6 uint8 = 162
 		var v7 uint8 = 163
 		var v8 uint8 = 164
 		var v9 uint8 = 165
 		var v10 uint8 = 166
 		var v11 uint8 = 167
 		var v12 uint8 = 168
 		var v13 uint8 = 169
 		var v14 uint8 = 170
 		var v15 uint8 = 171
 		var v16 uint8 = 172
 		var v17 uint8 = 173
 		var v18 uint8 = 174
 		var v19 uint8 = 175
 		var v20 uint8 = 176
 		var v21 uint8 = 177
 		var v22 uint8 = 178
 		var v23 uint8 = 179
 		var v24 uint8 = 180
 		var v25 uint8 = 181
 		var v26 uint8 = 182
 		var v27 uint8 = 183
 		var v28 uint8 = 184
 		var v29 uint8 = 185
 		var v30 uint8 = 186
 		var v31 uint8 = 187
 		var v32 uint8 = 188
 		var v33 uint8 = 189
 		var v34 uint8 = 190
 		var v35 uint8 = 191
 		v36 := [32]uint8{v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35}
 		v3.SetVariant(v36)
 		v1.TheUnion = v3
 		var v37 uint32 = 134678021
 		v1.After = v37

 		decodeSuccessCase{
 			name: "Sandwich4Case1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x03, 0x00, 0x00, 0x00,
 				0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
 				0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
 				0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
 				0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich4{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionSize36Align4{}
 		var v4 uint8 = 160
 		var v5 uint8 = 161
 		var v6 uint8 = 162
 		var v7 uint8 = 163
 		var v8 uint8 = 164
 		var v9 uint8 = 165
 		var v10 uint8 = 166
 		var v11 uint8 = 167
 		var v12 uint8 = 168
 		var v13 uint8 = 169
 		var v14 uint8 = 170
 		var v15 uint8 = 171
 		var v16 uint8 = 172
 		var v17 uint8 = 173
 		var v18 uint8 = 174
 		var v19 uint8 = 175
 		var v20 uint8 = 176
 		var v21 uint8 = 177
 		var v22 uint8 = 178
 		var v23 uint8 = 179
 		var v24 uint8 = 180
 		var v25 uint8 = 181
 		var v26 uint8 = 182
 		var v27 uint8 = 183
 		var v28 uint8 = 184
 		var v29 uint8 = 185
 		var v30 uint8 = 186
 		var v31 uint8 = 187
 		var v32 uint8 = 188
 		var v33 uint8 = 189
 		var v34 uint8 = 190
 		var v35 uint8 = 191
 		v36 := [32]uint8{v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35}
 		v3.SetVariant(v36)
 		v1.TheUnion = v3
 		var v37 uint32 = 134678021
 		v1.After = v37

 		decodeSuccessCase{
 			name: "Sandwich4Case1_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
 				0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
 				0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
 				0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich5{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionOfUnion{}
 		v4 := conformance.UnionSize8Align4{}
 		var v5 uint32 = 202050057
 		v4.SetVariant(v5)
 		v3.SetSize8align4(v4)
 		v1.UnionOfUnion = v3
 		var v6 uint32 = 134678021
 		v1.After = v6

 		decodeSuccessCase{
 			name: "Sandwich5Case1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x02, 0x00, 0x00, 0x00, 0x09, 0x0a, 0x0b, 0x0c,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich5{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionOfUnion{}
 		v4 := conformance.UnionSize8Align4{}
 		var v5 uint32 = 202050057
 		v4.SetVariant(v5)
 		v3.SetSize8align4(v4)
 		v1.UnionOfUnion = v3
 		var v6 uint32 = 134678021
 		v1.After = v6

 		decodeSuccessCase{
 			name: "Sandwich5Case1_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x09, 0x0a, 0x0b, 0x0c, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich5{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionOfUnion{}
 		v4 := conformance.UnionSize24Align8{}
 		v5 := conformance.StructSize16Align8{}
 		var v6 uint64 = 12080525177006498208
 		v5.F1 = v6
 		var v7 uint64 = 12659246559711111592
 		v5.F2 = v7
 		v4.SetVariant(v5)
 		v3.SetSize24align8(v4)
 		v1.UnionOfUnion = v3
 		var v8 uint32 = 134678021
 		v1.After = v8

 		decodeSuccessCase{
 			name: "Sandwich5Case2",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
 				0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich5{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionOfUnion{}
 		v4 := conformance.UnionSize24Align8{}
 		v5 := conformance.StructSize16Align8{}
 		var v6 uint64 = 12080525177006498208
 		v5.F1 = v6
 		var v7 uint64 = 12659246559711111592
 		v5.F2 = v7
 		v4.SetVariant(v5)
 		v3.SetSize24align8(v4)
 		v1.UnionOfUnion = v3
 		var v8 uint32 = 134678021
 		v1.After = v8

 		decodeSuccessCase{
 			name: "Sandwich5Case2_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x28, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
 				0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		var v4 uint8 = 160
 		var v5 uint8 = 161
 		var v6 uint8 = 162
 		var v7 uint8 = 163
 		var v8 uint8 = 164
 		var v9 uint8 = 165
 		v10 := []uint8{v4, v5, v6, v7, v8, v9}
 		v3.SetVectorOfUint8(v10)
 		v1.TheUnion = v3
 		var v11 uint32 = 134678021
 		v1.After = v11

 		decodeSuccessCase{
 			name: "Sandwich6Case1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		var v4 uint8 = 160
 		var v5 uint8 = 161
 		var v6 uint8 = 162
 		var v7 uint8 = 163
 		var v8 uint8 = 164
 		var v9 uint8 = 165
 		v10 := []uint8{v4, v5, v6, v7, v8, v9}
 		v3.SetVectorOfUint8(v10)
 		v1.TheUnion = v3
 		var v11 uint32 = 134678021
 		v1.After = v11

 		decodeSuccessCase{
 			name: "Sandwich6Case1_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		v4 := []uint8{}
 		v3.SetVectorOfUint8(v4)
 		v1.TheUnion = v3
 		var v5 uint32 = 134678021
 		v1.After = v5

 		decodeSuccessCase{
 			name: "Sandwich6Case1AbsentVector",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		v4 := []uint8{}
 		v3.SetVectorOfUint8(v4)
 		v1.TheUnion = v3
 		var v5 uint32 = 134678021
 		v1.After = v5

 		decodeSuccessCase{
 			name: "Sandwich6Case1AbsentVector_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		v4 := "soft migrations rock!"
 		v3.SetString(v4)
 		v1.TheUnion = v3
 		var v5 uint32 = 134678021
 		v1.After = v5

 		decodeSuccessCase{
 			name: "Sandwich6Case2",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x15, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0x73, 0x6f, 0x66, 0x74, 0x20, 0x6d, 0x69, 0x67,
 				0x72, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x20,
 				0x72, 0x6f, 0x63, 0x6b, 0x21, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		v4 := "soft migrations rock!"
 		v3.SetString(v4)
 		v1.TheUnion = v3
 		var v5 uint32 = 134678021
 		v1.After = v5

 		decodeSuccessCase{
 			name: "Sandwich6Case2_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x28, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0x15, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x73, 0x6f, 0x66, 0x74, 0x20, 0x6d, 0x69, 0x67,
 				0x72, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x20,
 				0x72, 0x6f, 0x63, 0x6b, 0x21, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		v4 := conformance.StructSize3Align1{}
 		var v5 uint8 = 115
 		var v6 uint8 = 111
 		var v7 uint8 = 102
 		v8 := [3]uint8{v5, v6, v7}
 		v4.ThreeBytes = v8
 		v9 := conformance.StructSize3Align1{}
 		var v10 uint8 = 32
 		var v11 uint8 = 109
 		var v12 uint8 = 105
 		v13 := [3]uint8{v10, v11, v12}
 		v9.ThreeBytes = v13
 		v14 := conformance.StructSize3Align1{}
 		var v15 uint8 = 114
 		var v16 uint8 = 97
 		var v17 uint8 = 116
 		v18 := [3]uint8{v15, v16, v17}
 		v14.ThreeBytes = v18
 		v19 := []conformance.StructSize3Align1{v4, v9, v14}
 		v3.SetVectorS3A1(v19)
 		v1.TheUnion = v3
 		var v20 uint32 = 134678021
 		v1.After = v20

 		decodeSuccessCase{
 			name: "Sandwich6Case3",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0x73, 0x6f, 0x66, 0x20, 0x6d, 0x69, 0x72, 0x61,
 				0x74, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		v4 := conformance.StructSize3Align1{}
 		var v5 uint8 = 115
 		var v6 uint8 = 111
 		var v7 uint8 = 102
 		v8 := [3]uint8{v5, v6, v7}
 		v4.ThreeBytes = v8
 		v9 := conformance.StructSize3Align1{}
 		var v10 uint8 = 32
 		var v11 uint8 = 109
 		var v12 uint8 = 105
 		v13 := [3]uint8{v10, v11, v12}
 		v9.ThreeBytes = v13
 		v14 := conformance.StructSize3Align1{}
 		var v15 uint8 = 114
 		var v16 uint8 = 97
 		var v17 uint8 = 116
 		v18 := [3]uint8{v15, v16, v17}
 		v14.ThreeBytes = v18
 		v19 := []conformance.StructSize3Align1{v4, v9, v14}
 		v3.SetVectorS3A1(v19)
 		v1.TheUnion = v3
 		var v20 uint32 = 134678021
 		v1.After = v20

 		decodeSuccessCase{
 			name: "Sandwich6Case3_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x73, 0x6f, 0x66, 0x20, 0x6d, 0x69, 0x72, 0x61,
 				0x74, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		v4 := conformance.StructSize3Align2{}
 		var v5 uint16 = 28531
 		v4.F1 = v5
 		var v6 uint8 = 102
 		v4.F2 = v6
 		v7 := conformance.StructSize3Align2{}
 		var v8 uint16 = 27936
 		v7.F1 = v8
 		var v9 uint8 = 105
 		v7.F2 = v9
 		v10 := conformance.StructSize3Align2{}
 		var v11 uint16 = 24946
 		v10.F1 = v11
 		var v12 uint8 = 116
 		v10.F2 = v12
 		v13 := []conformance.StructSize3Align2{v4, v7, v10}
 		v3.SetVectorS3A2(v13)
 		v1.TheUnion = v3
 		var v14 uint32 = 134678021
 		v1.After = v14

 		decodeSuccessCase{
 			name: "Sandwich6Case4",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0x73, 0x6f, 0x66, 0x00, 0x20, 0x6d, 0x69, 0x00,
 				0x72, 0x61, 0x74, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		v4 := conformance.StructSize3Align2{}
 		var v5 uint16 = 28531
 		v4.F1 = v5
 		var v6 uint8 = 102
 		v4.F2 = v6
 		v7 := conformance.StructSize3Align2{}
 		var v8 uint16 = 27936
 		v7.F1 = v8
 		var v9 uint8 = 105
 		v7.F2 = v9
 		v10 := conformance.StructSize3Align2{}
 		var v11 uint16 = 24946
 		v10.F1 = v11
 		var v12 uint8 = 116
 		v10.F2 = v12
 		v13 := []conformance.StructSize3Align2{v4, v7, v10}
 		v3.SetVectorS3A2(v13)
 		v1.TheUnion = v3
 		var v14 uint32 = 134678021
 		v1.After = v14

 		decodeSuccessCase{
 			name: "Sandwich6Case4_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x73, 0x6f, 0x66, 0x00, 0x20, 0x6d, 0x69, 0x00,
 				0x72, 0x61, 0x74, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		var v4 uint32 = 4294967295
 		var v5 uint32 = 4294967295
 		var v6 uint32 = 4294967295
 		v7 := []uint32{v4, v5, v6}
 		v3.SetHandles(v7)
 		v1.TheUnion = v3
 		var v8 uint32 = 134678021
 		v1.After = v8

 		decodeSuccessCase{
 			name: "Sandwich6Case5",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		var v4 uint32 = 4294967295
 		var v5 uint32 = 4294967295
 		var v6 uint32 = 4294967295
 		v7 := []uint32{v4, v5, v6}
 		v3.SetHandles(v7)
 		v1.TheUnion = v3
 		var v8 uint32 = 134678021
 		v1.After = v8

 		decodeSuccessCase{
 			name: "Sandwich6Case5_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		v4 := conformance.StructSize3Align1{}
 		var v5 uint8 = 161
 		var v6 uint8 = 162
 		var v7 uint8 = 163
 		v8 := [3]uint8{v5, v6, v7}
 		v4.ThreeBytes = v8
 		v9 := conformance.StructSize3Align1{}
 		var v10 uint8 = 164
 		var v11 uint8 = 165
 		var v12 uint8 = 166
 		v13 := [3]uint8{v10, v11, v12}
 		v9.ThreeBytes = v13
 		v14 := [2]conformance.StructSize3Align1{v4, v9}
 		v3.SetArrayS3A1(v14)
 		v1.TheUnion = v3
 		var v15 uint32 = 134678021
 		v1.After = v15

 		decodeSuccessCase{
 			name: "Sandwich6Case6",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		v4 := conformance.StructSize3Align1{}
 		var v5 uint8 = 161
 		var v6 uint8 = 162
 		var v7 uint8 = 163
 		v8 := [3]uint8{v5, v6, v7}
 		v4.ThreeBytes = v8
 		v9 := conformance.StructSize3Align1{}
 		var v10 uint8 = 164
 		var v11 uint8 = 165
 		var v12 uint8 = 166
 		v13 := [3]uint8{v10, v11, v12}
 		v9.ThreeBytes = v13
 		v14 := [2]conformance.StructSize3Align1{v4, v9}
 		v3.SetArrayS3A1(v14)
 		v1.TheUnion = v3
 		var v15 uint32 = 134678021
 		v1.After = v15

 		decodeSuccessCase{
 			name: "Sandwich6Case6_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		v4 := conformance.StructSize3Align2{}
 		var v5 uint16 = 41633
 		v4.F1 = v5
 		var v6 uint8 = 163
 		v4.F2 = v6
 		v7 := conformance.StructSize3Align2{}
 		var v8 uint16 = 42404
 		v7.F1 = v8
 		var v9 uint8 = 166
 		v7.F2 = v9
 		v10 := [2]conformance.StructSize3Align2{v4, v7}
 		v3.SetArrayS3A2(v10)
 		v1.TheUnion = v3
 		var v11 uint32 = 134678021
 		v1.After = v11

 		decodeSuccessCase{
 			name: "Sandwich6Case7",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xa1, 0xa2, 0xa3, 0x00, 0xa4, 0xa5, 0xa6, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		v4 := conformance.StructSize3Align2{}
 		var v5 uint16 = 41633
 		v4.F1 = v5
 		var v6 uint8 = 163
 		v4.F2 = v6
 		v7 := conformance.StructSize3Align2{}
 		var v8 uint16 = 42404
 		v7.F1 = v8
 		var v9 uint8 = 166
 		v7.F2 = v9
 		v10 := [2]conformance.StructSize3Align2{v4, v7}
 		v3.SetArrayS3A2(v10)
 		v1.TheUnion = v3
 		var v11 uint32 = 134678021
 		v1.After = v11

 		decodeSuccessCase{
 			name: "Sandwich6Case7_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0xa1, 0xa2, 0xa3, 0x00, 0xa4, 0xa5, 0xa6, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		v4 := conformance.UnionSize8Align4{}
 		var v5 uint32 = 202050057
 		v4.SetVariant(v5)
 		v6 := []conformance.UnionSize8Align4{v4}
 		v3.SetVectorUnion(v6)
 		v1.TheUnion = v3
 		var v7 uint32 = 134678021
 		v1.After = v7

 		decodeSuccessCase{
 			name: "Sandwich6Case8",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0x02, 0x00, 0x00, 0x00, 0x09, 0x0a, 0x0b, 0x0c,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Sandwich6{}
 		var v2 uint32 = 67305985
 		v1.Before = v2
 		v3 := conformance.UnionWithVector{}
 		v4 := conformance.UnionSize8Align4{}
 		var v5 uint32 = 202050057
 		v4.SetVariant(v5)
 		v6 := []conformance.UnionSize8Align4{v4}
 		v3.SetVectorUnion(v6)
 		v1.TheUnion = v3
 		var v7 uint32 = 134678021
 		v1.After = v7

 		decodeSuccessCase{
 			name: "Sandwich6Case8_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x09, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x30, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x06, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x09, 0x0a, 0x0b, 0x0c, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.TableStructWithReservedSandwichStruct{}
 		v2 := conformance.TableStructWithReservedSandwich{}
 		v3 := conformance.StructSize3Align1{}
 		var v4 uint8 = 9
 		var v5 uint8 = 10
 		var v6 uint8 = 11
 		v7 := [3]uint8{v4, v5, v6}
 		v3.ThreeBytes = v7
 		v2.SetS1(v3)
 		v8 := conformance.StructSize3Align1{}
 		var v9 uint8 = 25
 		var v10 uint8 = 26
 		var v11 uint8 = 27
 		v12 := [3]uint8{v9, v10, v11}
 		v8.ThreeBytes = v12
 		v2.SetS2(v8)
 		v1.Table = v2

 		decodeSuccessCase{
 			name: "Table_StructWithReservedSandwich",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x09, 0x0a, 0x0b, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x19, 0x1a, 0x1b, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.TableStructWithReservedSandwichStruct{}
 		v2 := conformance.TableStructWithReservedSandwich{}
 		v3 := conformance.StructSize3Align1{}
 		var v4 uint8 = 9
 		var v5 uint8 = 10
 		var v6 uint8 = 11
 		v7 := [3]uint8{v4, v5, v6}
 		v3.ThreeBytes = v7
 		v2.SetS1(v3)
 		v8 := conformance.StructSize3Align1{}
 		var v9 uint8 = 25
 		var v10 uint8 = 26
 		var v11 uint8 = 27
 		v12 := [3]uint8{v9, v10, v11}
 		v8.ThreeBytes = v12
 		v2.SetS2(v8)
 		v1.Table = v2

 		decodeSuccessCase{
 			name: "Table_StructWithReservedSandwich_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x09, 0x0a, 0x0b, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x19, 0x1a, 0x1b, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.TableStructWithUint32SandwichStruct{}
 		v2 := conformance.TableStructWithUint32Sandwich{}
 		var v3 uint32 = 67305985
 		v2.SetI(v3)
 		v4 := conformance.StructSize3Align1{}
 		var v5 uint8 = 9
 		var v6 uint8 = 10
 		var v7 uint8 = 11
 		v8 := [3]uint8{v5, v6, v7}
 		v4.ThreeBytes = v8
 		v2.SetS1(v4)
 		v9 := conformance.StructSize3Align1{}
 		var v10 uint8 = 25
 		var v11 uint8 = 26
 		var v12 uint8 = 27
 		v13 := [3]uint8{v10, v11, v12}
 		v9.ThreeBytes = v13
 		v2.SetS2(v9)
 		var v14 uint32 = 218893066
 		v2.SetI2(v14)
 		v1.Table = v2

 		decodeSuccessCase{
 			name: "Table_StructWithUint32Sandwich",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x09, 0x0a, 0x0b, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x19, 0x1a, 0x1b, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x0a, 0x0b, 0x0c, 0x0d, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.TableStructWithUint32SandwichStruct{}
 		v2 := conformance.TableStructWithUint32Sandwich{}
 		var v3 uint32 = 67305985
 		v2.SetI(v3)
 		v4 := conformance.StructSize3Align1{}
 		var v5 uint8 = 9
 		var v6 uint8 = 10
 		var v7 uint8 = 11
 		v8 := [3]uint8{v5, v6, v7}
 		v4.ThreeBytes = v8
 		v2.SetS1(v4)
 		v9 := conformance.StructSize3Align1{}
 		var v10 uint8 = 25
 		var v11 uint8 = 26
 		var v12 uint8 = 27
 		v13 := [3]uint8{v10, v11, v12}
 		v9.ThreeBytes = v13
 		v2.SetS2(v9)
 		var v14 uint32 = 218893066
 		v2.SetI2(v14)
 		v1.Table = v2

 		decodeSuccessCase{
 			name: "Table_StructWithUint32Sandwich_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x02, 0x03, 0x04, 0x00, 0x00, 0x00, 0x00,
 				0x09, 0x0a, 0x0b, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x19, 0x1a, 0x1b, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x0a, 0x0b, 0x0c, 0x0d, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.TableUnionWithVectorReservedSandwichStruct{}
 		v2 := conformance.TableUnionWithVectorReservedSandwich{}
 		v3 := conformance.UnionWithVector{}
 		v4 := "hello"
 		v3.SetString(v4)
 		v2.SetUv(v3)
 		v1.Table = v2

 		decodeSuccessCase{
 			name: "Table_UnionWithVector_ReservedSandwich",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.TableUnionWithVectorReservedSandwichStruct{}
 		v2 := conformance.TableUnionWithVectorReservedSandwich{}
 		v3 := conformance.UnionWithVector{}
 		v4 := "hello"
 		v3.SetString(v4)
 		v2.SetUv(v3)
 		v1.Table = v2

 		decodeSuccessCase{
 			name: "Table_UnionWithVector_ReservedSandwich_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x30, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.TableUnionWithVectorStructSandwichStruct{}
 		v2 := conformance.TableUnionWithVectorStructSandwich{}
 		v3 := conformance.StructSize3Align1{}
 		var v4 uint8 = 1
 		var v5 uint8 = 2
 		var v6 uint8 = 3
 		v7 := [3]uint8{v4, v5, v6}
 		v3.ThreeBytes = v7
 		v2.SetS1(v3)
 		v8 := conformance.UnionWithVector{}
 		v9 := "hello"
 		v8.SetString(v9)
 		v2.SetUv(v8)
 		v10 := conformance.StructSize3Align1{}
 		var v11 uint8 = 4
 		var v12 uint8 = 5
 		var v13 uint8 = 6
 		v14 := [3]uint8{v11, v12, v13}
 		v10.ThreeBytes = v14
 		v2.SetS2(v10)
 		v1.Table = v2

 		decodeSuccessCase{
 			name: "Table_UnionWithVector_StructSandwich",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x02, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x00, 0x00, 0x00,
 				0x04, 0x05, 0x06, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.TableUnionWithVectorStructSandwichStruct{}
 		v2 := conformance.TableUnionWithVectorStructSandwich{}
 		v3 := conformance.StructSize3Align1{}
 		var v4 uint8 = 1
 		var v5 uint8 = 2
 		var v6 uint8 = 3
 		v7 := [3]uint8{v4, v5, v6}
 		v3.ThreeBytes = v7
 		v2.SetS1(v3)
 		v8 := conformance.UnionWithVector{}
 		v9 := "hello"
 		v8.SetString(v9)
 		v2.SetUv(v8)
 		v10 := conformance.StructSize3Align1{}
 		var v11 uint8 = 4
 		var v12 uint8 = 5
 		var v13 uint8 = 6
 		v14 := [3]uint8{v11, v12, v13}
 		v10.ThreeBytes = v14
 		v2.SetS2(v10)
 		v1.Table = v2

 		decodeSuccessCase{
 			name: "Table_UnionWithVector_StructSandwich_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x30, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x02, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x00, 0x00, 0x00,
 				0x04, 0x05, 0x06, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.XUnionWithStructStruct{}
 		v2 := conformance.XUnionWithStruct{}
 		v3 := conformance.StructSize3Align1{}
 		var v4 uint8 = 1
 		var v5 uint8 = 2
 		var v6 uint8 = 3
 		v7 := [3]uint8{v4, v5, v6}
 		v3.ThreeBytes = v7
 		v2.SetS(v3)
 		v1.Xu = v2

 		decodeSuccessCase{
 			name: "XUnionWithStruct",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x14, 0x5c, 0x3e, 0x19, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x02, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.XUnionWithStructStruct{}
 		v2 := conformance.XUnionWithStruct{}
 		v3 := conformance.StructSize3Align1{}
 		var v4 uint8 = 1
 		var v5 uint8 = 2
 		var v6 uint8 = 3
 		v7 := [3]uint8{v4, v5, v6}
 		v3.ThreeBytes = v7
 		v2.SetS(v3)
 		v1.Xu = v2

 		decodeSuccessCase{
 			name: "XUnionWithStruct_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x14, 0x5c, 0x3e, 0x19, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x02, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.ArrayStruct{}
 		v2 := conformance.StringUnion{}
 		v3 := "one"
 		v2.SetS(v3)
 		v4 := conformance.StringUnion{}
 		v5 := "two"
 		v4.SetS(v5)
 		v6 := conformance.StringUnion{}
 		v7 := "three"
 		v6.SetS(v7)
 		v8 := [3]conformance.StringUnion{v2, v4, v6}
 		v1.Unions = v8
 		v9 := &conformance.StringUnion{}
 		v10 := "four"
 		v9.SetS(v10)
 		v11 := &conformance.StringUnion{}
 		v12 := "five"
 		v11.SetS(v12)
 		v13 := &conformance.StringUnion{}
 		v14 := "six"
 		v13.SetS(v14)
 		v15 := [3]*conformance.StringUnion{v9, v11, v13}
 		v1.OptionalUnions = v15

 		decodeSuccessCase{
 			name: "ArrayStruct",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x6f, 0x6e, 0x65, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x74, 0x77, 0x6f, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x74, 0x68, 0x72, 0x65, 0x65, 0x00, 0x00, 0x00,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x66, 0x6f, 0x75, 0x72, 0x00, 0x00, 0x00, 0x00,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x66, 0x69, 0x76, 0x65, 0x00, 0x00, 0x00, 0x00,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x73, 0x69, 0x78, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.ArrayStruct{}
 		v2 := conformance.StringUnion{}
 		v3 := "one"
 		v2.SetS(v3)
 		v4 := conformance.StringUnion{}
 		v5 := "two"
 		v4.SetS(v5)
 		v6 := conformance.StringUnion{}
 		v7 := "three"
 		v6.SetS(v7)
 		v8 := [3]conformance.StringUnion{v2, v4, v6}
 		v1.Unions = v8
 		v9 := &conformance.StringUnion{}
 		v10 := "four"
 		v9.SetS(v10)
 		v11 := &conformance.StringUnion{}
 		v12 := "five"
 		v11.SetS(v12)
 		v13 := &conformance.StringUnion{}
 		v14 := "six"
 		v13.SetS(v14)
 		v15 := [3]*conformance.StringUnion{v9, v11, v13}
 		v1.OptionalUnions = v15

 		decodeSuccessCase{
 			name: "ArrayStruct_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x6f, 0x6e, 0x65, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x74, 0x77, 0x6f, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x74, 0x68, 0x72, 0x65, 0x65, 0x00, 0x00, 0x00,
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x66, 0x6f, 0x75, 0x72, 0x00, 0x00, 0x00, 0x00,
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x66, 0x69, 0x76, 0x65, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x73, 0x69, 0x78, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Regression1{}
 		var v2 uint8 = 1
 		v1.F1 = v2
 		var v3 uint32 = 2
 		v1.F2 = v3
 		var v4 uint8 = 3
 		v1.F3 = v4
 		var v5 uint16 = 4
 		v1.F4 = v5
 		var v6 uint64 = 5
 		v1.F5 = v6
 		var v7 uint8 = 6
 		v1.F6 = v7

 		decodeSuccessCase{
 			name: "Regression1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Regression1{}
 		var v2 uint8 = 1
 		v1.F1 = v2
 		var v3 uint32 = 2
 		v1.F2 = v3
 		var v4 uint8 = 3
 		v1.F3 = v4
 		var v5 uint16 = 4
 		v1.F4 = v5
 		var v6 uint64 = 5
 		v1.F5 = v6
 		var v7 uint8 = 6
 		v1.F6 = v7

 		decodeSuccessCase{
 			name: "Regression1_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Regression2{}
 		v2 := conformance.Regression1{}
 		var v3 uint8 = 1
 		v2.F1 = v3
 		var v4 uint32 = 2
 		v2.F2 = v4
 		var v5 uint8 = 3
 		v2.F3 = v5
 		var v6 uint16 = 4
 		v2.F4 = v6
 		var v7 uint64 = 5
 		v2.F5 = v7
 		var v8 uint8 = 6
 		v2.F6 = v8
 		v1.Head = v2
 		var v9 uint8 = 7
 		v1.F7 = v9

 		decodeSuccessCase{
 			name: "Regression2",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Regression2{}
 		v2 := conformance.Regression1{}
 		var v3 uint8 = 1
 		v2.F1 = v3
 		var v4 uint32 = 2
 		v2.F2 = v4
 		var v5 uint8 = 3
 		v2.F3 = v5
 		var v6 uint16 = 4
 		v2.F4 = v6
 		var v7 uint64 = 5
 		v2.F5 = v7
 		var v8 uint8 = 6
 		v2.F6 = v8
 		v1.Head = v2
 		var v9 uint8 = 7
 		v1.F7 = v9

 		decodeSuccessCase{
 			name: "Regression2_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Regression3{}

 		decodeSuccessCase{
 			name: "Regression3Absent",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Regression3{}

 		decodeSuccessCase{
 			name: "Regression3Absent_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Regression3{}
 		v2 := &conformance.Regression2{}
 		v3 := conformance.Regression1{}
 		var v4 uint8 = 1
 		v3.F1 = v4
 		var v5 uint32 = 2
 		v3.F2 = v5
 		var v6 uint8 = 3
 		v3.F3 = v6
 		var v7 uint16 = 4
 		v3.F4 = v7
 		var v8 uint64 = 5
 		v3.F5 = v8
 		var v9 uint8 = 6
 		v3.F6 = v9
 		v2.Head = v3
 		var v10 uint8 = 7
 		v2.F7 = v10
 		v1.OptValue = v2

 		decodeSuccessCase{
 			name: "Regression3Present",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.Regression3{}
 		v2 := &conformance.Regression2{}
 		v3 := conformance.Regression1{}
 		var v4 uint8 = 1
 		v3.F1 = v4
 		var v5 uint32 = 2
 		v3.F2 = v5
 		var v6 uint8 = 3
 		v3.F3 = v6
 		var v7 uint16 = 4
 		v3.F4 = v7
 		var v8 uint64 = 5
 		v3.F5 = v8
 		var v9 uint8 = 6
 		v3.F6 = v9
 		v2.Head = v3
 		var v10 uint8 = 7
 		v2.F7 = v10
 		v1.OptValue = v2

 		decodeSuccessCase{
 			name: "Regression3Present_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.UnionWithBoundStringStruct{}
 		v2 := conformance.UnionWithBoundString{}
 		v3 := "abcd"
 		v2.SetBoundFiveStr(v3)
 		v1.V = v2

 		decodeSuccessCase{
 			name: "UnionWithBoundString",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x61, 0x62, 0x63, 0x64, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.SingleVariantUnionStruct{}
 		v2 := conformance.SingleVariantUnion{}
 		var v3 uint32 = 42
 		v2.SetX(v3)
 		v1.U = v2

 		decodeSuccessCase{
 			name: "UnionMigration_SingleVariant",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x00, 0x00, 0x00, 0x00, 0x2a, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.SingleVariantUnionStruct{}
 		v2 := conformance.SingleVariantUnion{}
 		var v3 uint32 = 42
 		v2.SetX(v3)
 		v1.U = v2

 		decodeSuccessCase{
 			name: "UnionMigration_SingleVariant_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x2a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.SandwichUnionSize8Alignment4{}
 		var v2 uint32 = 10
 		v1.Before = v2
 		v3 := conformance.UnionSize8Alignment4{}
 		var v4 uint32 = 4
 		v3.SetVariant(v4)
 		v1.Value = v3
 		var v5 uint32 = 20
 		v1.After = v5

 		decodeSuccessCase{
 			name: "UnionSize8Alignment4",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x0a, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
 				0x04, 0x00, 0x00, 0x00, 0x14, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.SandwichUnionSize8Alignment4{}
 		var v2 uint32 = 10
 		v1.Before = v2
 		v3 := conformance.UnionSize8Alignment4{}
 		var v4 uint32 = 4
 		v3.SetVariant(v4)
 		v1.Value = v3
 		var v5 uint32 = 20
 		v1.After = v5

 		decodeSuccessCase{
 			name: "UnionSize8Alignment4_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.SandwichUnionSize12Alignment4{}
 		var v2 uint32 = 10
 		v1.Before = v2
 		v3 := conformance.UnionSize12Alignment4{}
 		var v4 uint8 = 1
 		var v5 uint8 = 2
 		var v6 uint8 = 3
 		var v7 uint8 = 4
 		var v8 uint8 = 5
 		var v9 uint8 = 6
 		v10 := [6]uint8{v4, v5, v6, v7, v8, v9}
 		v3.SetVariant(v10)
 		v1.Value = v3
 		var v11 uint32 = 20
 		v1.After = v11

 		decodeSuccessCase{
 			name: "UnionSize12Alignment4",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x0a, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00,
 				0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x00, 0x00,
 				0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.SandwichUnionSize12Alignment4{}
 		var v2 uint32 = 10
 		v1.Before = v2
 		v3 := conformance.UnionSize12Alignment4{}
 		var v4 uint8 = 1
 		var v5 uint8 = 2
 		var v6 uint8 = 3
 		var v7 uint8 = 4
 		var v8 uint8 = 5
 		var v9 uint8 = 6
 		v10 := [6]uint8{v4, v5, v6, v7, v8, v9}
 		v3.SetVariant(v10)
 		v1.Value = v3
 		var v11 uint32 = 20
 		v1.After = v11

 		decodeSuccessCase{
 			name: "UnionSize12Alignment4_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.SandwichUnionSize24Alignment8{}
 		var v2 uint32 = 10
 		v1.Before = v2
 		v3 := conformance.UnionSize24Alignment8{}
 		v4 := conformance.StructSize16Alignment8{}
 		var v5 uint64 = 1
 		v4.F1 = v5
 		var v6 uint64 = 2
 		v4.F2 = v6
 		v3.SetVariant(v4)
 		v1.Value = v3
 		var v7 uint32 = 20
 		v1.After = v7

 		decodeSuccessCase{
 			name: "UnionSize24Alignment8",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.SandwichUnionSize24Alignment8{}
 		var v2 uint32 = 10
 		v1.Before = v2
 		v3 := conformance.UnionSize24Alignment8{}
 		v4 := conformance.StructSize16Alignment8{}
 		var v5 uint64 = 1
 		v4.F1 = v5
 		var v6 uint64 = 2
 		v4.F2 = v6
 		v3.SetVariant(v4)
 		v1.Value = v3
 		var v7 uint32 = 20
 		v1.After = v7

 		decodeSuccessCase{
 			name: "UnionSize24Alignment8_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.SandwichUnionSize36Alignment4{}
 		var v2 uint32 = 10
 		v1.Before = v2
 		v3 := conformance.UnionSize36Alignment4{}
 		var v4 uint8 = 1
 		var v5 uint8 = 2
 		var v6 uint8 = 3
 		var v7 uint8 = 4
 		var v8 uint8 = 5
 		var v9 uint8 = 6
 		var v10 uint8 = 7
 		var v11 uint8 = 8
 		var v12 uint8 = 9
 		var v13 uint8 = 10
 		var v14 uint8 = 11
 		var v15 uint8 = 12
 		var v16 uint8 = 13
 		var v17 uint8 = 14
 		var v18 uint8 = 15
 		var v19 uint8 = 16
 		var v20 uint8 = 17
 		var v21 uint8 = 18
 		var v22 uint8 = 19
 		var v23 uint8 = 20
 		var v24 uint8 = 21
 		var v25 uint8 = 22
 		var v26 uint8 = 23
 		var v27 uint8 = 24
 		var v28 uint8 = 25
 		var v29 uint8 = 26
 		var v30 uint8 = 27
 		var v31 uint8 = 28
 		var v32 uint8 = 29
 		var v33 uint8 = 30
 		var v34 uint8 = 31
 		var v35 uint8 = 32
 		v36 := [32]uint8{v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35}
 		v3.SetVariant(v36)
 		v1.Value = v3
 		var v37 uint32 = 20
 		v1.After = v37

 		decodeSuccessCase{
 			name: "UnionSize36Alignment4",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x0a, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00,
 				0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
 				0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10,
 				0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18,
 				0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20,
 				0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 		}.check(t)
 	}

 	{
 		v1 := conformance.SandwichUnionSize36Alignment4{}
 		var v2 uint32 = 10
 		v1.Before = v2
 		v3 := conformance.UnionSize36Alignment4{}
 		var v4 uint8 = 1
 		var v5 uint8 = 2
 		var v6 uint8 = 3
 		var v7 uint8 = 4
 		var v8 uint8 = 5
 		var v9 uint8 = 6
 		var v10 uint8 = 7
 		var v11 uint8 = 8
 		var v12 uint8 = 9
 		var v13 uint8 = 10
 		var v14 uint8 = 11
 		var v15 uint8 = 12
 		var v16 uint8 = 13
 		var v17 uint8 = 14
 		var v18 uint8 = 15
 		var v19 uint8 = 16
 		var v20 uint8 = 17
 		var v21 uint8 = 18
 		var v22 uint8 = 19
 		var v23 uint8 = 20
 		var v24 uint8 = 21
 		var v25 uint8 = 22
 		var v26 uint8 = 23
 		var v27 uint8 = 24
 		var v28 uint8 = 25
 		var v29 uint8 = 26
 		var v30 uint8 = 27
 		var v31 uint8 = 28
 		var v32 uint8 = 29
 		var v33 uint8 = 30
 		var v34 uint8 = 31
 		var v35 uint8 = 32
 		v36 := [32]uint8{v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18, v19, v20, v21, v22, v23, v24, v25, v26, v27, v28, v29, v30, v31, v32, v33, v34, v35}
 		v3.SetVariant(v36)
 		v1.Value = v3
 		var v37 uint32 = 20
 		v1.After = v37

 		decodeSuccessCase{
 			name: "UnionSize36Alignment4_v1",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: true,
 				EncodeUnionsAsXUnionBytes:   true,
 			},
 			input: &v1,
 			bytes: []byte{
 				0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
 				0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10,
 				0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18,
 				0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20,
 			},
 		}.check(t)
 	}

 }

 func TestAllEncodeFailureCases(t *testing.T) {

 	{
 		v1 := conformance.TestStrictXUnionInStruct{}
 		v2 := conformance.SampleStrictXUnion{}
 		v1.Xu = v2

 		encodeFailureCase{
 			name: "StrictXUnion Field Not Set",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			code:  fidl.ErrInvalidXUnionTag,
 		}.check(t)
 	}

 	{
 		v1 := conformance.Length2StringWrapper{}
 		v2 := "abc"
 		v1.Length2String = v2

 		encodeFailureCase{
 			name: "StringExceedsLimit",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			code:  fidl.ErrStringTooLong,
 		}.check(t)
 	}

 	{
 		v1 := conformance.UnionWithBoundStringStruct{}
 		v2 := conformance.UnionWithBoundString{}
 		v3 := "abcdef"
 		v2.SetBoundFiveStr(v3)
 		v1.V = v2

 		encodeFailureCase{
 			name: "UnionWithBoundString_ExceedsBounds",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			input: &v1,
 			code:  fidl.ErrStringTooLong,
 		}.check(t)
 	}

 }

 func TestAllDecodeFailureCases(t *testing.T) {

 	{
 		decodeFailureCase{
 			name: "StrictXUnion Field Unknown",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			valTyp: reflect.TypeOf((*conformance.TestStrictXUnionInStruct)(nil)),
 			bytes: []byte{
 				0x11, 0xba, 0x5e, 0xba, 0x00, 0x00, 0x00, 0x00,
 				0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
 				0xde, 0xad, 0xbe, 0xef, 0x5c, 0xa1, 0xab, 0x1e,
 			},
 			code: fidl.ErrInvalidXUnionTag,
 		}.check(t)
 	}

 	{
 		decodeFailureCase{
 			name: "NonEmptyStringWithNullPtrBody",
 			context: fidl.MarshalerContext{
 				DecodeUnionsFromXUnionBytes: false,
 				EncodeUnionsAsXUnionBytes:   false,
 			},
 			valTyp: reflect.TypeOf((*conformance.StringWrapper)(nil)),
 			bytes: []byte{
 				0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 			},
 			code: fidl.ErrUnexpectedNullRef,
 		}.check(t)
 	}

 }