sdk/testing/fidl/types_tests/types.test.fidl

// 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.
library test.types;

using zx;

type CopyableStruct = struct {
    x int32;
};

type MoveOnlyStruct = resource struct {
    h zx.handle:optional;
};

type VectorStruct = struct {
    v vector<uint32>;
};

type StructWithPadding = struct {
    a uint8;
    b uint32;
};

type StructWithoutPadding = struct {
    a uint8;
    b uint8;
    c uint16;
    d uint32;
};

/// Verifies that user code can manipulate these union payloads.
type TestUnion = strict resource union {
    1: primitive int32;
    2: copyable CopyableStruct;
    3: move_only MoveOnlyStruct;
};

type TestXUnion = flexible resource union {
    1: primitive int32;
    2: copyable CopyableStruct;
    3: h zx.handle;
};

type TestStrictXUnion = strict union {
    1: primitive int32;
    2: copyable CopyableStruct;
};

type UnionWithUint64 = strict union {
    1: value int64;
};

type TestStrictXUnionInStruct = struct {
    xu TestStrictXUnion;
};

type TestStrictXUnionInArrayInStruct = struct {
    arr array<TestStrictXUnion, 10>;
};

type TestNonResourceXUnion = flexible union {
    1: primitive int32;
};

/// Verifies that user code can manipulate these bits.
///
/// We use a uint8 since most bitwise operations will cast their operands to
/// int, and therefore special casting is required to properly compile.
type StrictBits = strict bits : uint8 {
    B = 2;
    D = 4;
    E = 8;
};

/// The members should be kept in sync with those in [`StrictBits`], as we have
/// tests parameterized on both bits types.
type FlexibleBits = flexible bits : uint8 {
    B = 2;
    D = 4;
    E = 8;
};

/// Verifies that user code can build and access tables.
type SampleTable = table {
    1: x uint8;
    2: y uint8;
    3: vector_of_struct vector<CopyableStruct>;
    4: b bool;
    5: s string;
};

/// Verifies that an empty table compiles.
type SampleEmptyTable = table {};

protocol TestInterface {
    TestMethod(resource struct {
        u TestUnion;
    }) -> (resource struct {
        u TestUnion;
    });
};

/// Verifies that method argument types don't conflict with user-defined types.
type FooRequest = struct {
    bar int32;
};

type FooResponse = struct {
    bar int32;
};

type FooEvent = struct {
    bar int32;
};

protocol Baz {
    Foo(struct {
        req FooRequest;
    }) -> (struct {
        res FooResponse;
    });
    -> FooEvent(FooEvent);
};

type TableWithSubTables = table {
    1: t SampleTable;
    2: vt vector<SampleTable>;
    3: at array<SampleTable, 3>;
};

type StrictEnum = strict enum : uint32 {
    B = 2;
    D = 4;
    E = 8;
};

type FlexibleEnum = flexible enum : uint32 {
    B = 2;
    D = 4;
    E = 8;
    @unknown
    CUSTOM = 56;
};

type EmptyFlexibleEnum = flexible enum : uint32 {};
type EmptyStruct = struct {};
type TestTable = table {
    1: x uint8;
};

type Uint64Table = table {
    1: x uint64;
};

type TestResourceTable = resource table {
    1: x uint8;
};

type HandleStruct = resource struct {
    h zx.handle:EVENT;
};

type TestHandleTable = resource table {
    1: hs HandleStruct;
};

type NonInlinableHandleStruct = resource struct {
    h zx.handle:EVENT;
    i int64;
};

type TestHandleTableNonInlinableField = resource table {
    1: hs NonInlinableHandleStruct;
};

type TableMaxOrdinal3WithReserved2 = table {
    1: field_1 uint8;
    2: reserved;
    3: field_3 uint8;
};

/// Certain traits are only implemented for top level (i.e. request/response struct)
/// types, since LLCPP only calls encode/decode on those top level types.
/// Types used in tests that exercise these codepaths (e.g. involving HasFlexibleEnvelope)
/// should be put in a request/response struct instead of a regular struct in order
/// to reflect the actual paths exercised within a protocol.
///
/// For example, to test a union MyUnion, instead of:
///   - declaring wrapper struct `struct MyUnionStruct { MyUnion xu };`
///   - writing encode/decode tests in C++ using MyUnionStruct
/// do:
///   - add method `MyUnion() -> (MyUnion result);`
///   - write tests in C++ using MsgWrapper::MyUnionResponse
protocol MsgWrapper {
    TestXUnion() -> (resource struct {
        result TestXUnion;
    });
    TestNonResourceXUnion() -> (struct {
        result TestNonResourceXUnion;
    });
    TestTable() -> (struct {
        result TestTable;
    });
    TestResourceTable() -> (resource struct {
        result TestResourceTable;
    });
};

protocol TypesTest {
    NonNullableChannel(resource struct {
        channel zx.handle:CHANNEL;
    });
};

protocol UsesAnonymous {
    FooMethod(struct {
        req_member table {
            1: inner_table union {
                1: data uint8;
            };
        };
    }) -> (struct {}) error enum {
        FOO = 1;
    };
};

protocol ErrorSyntax {
    EmptyPayload() -> (struct {}) error int32;
    FooPayload() -> (FooResponse) error int32;
    -> EventEmptyPayload(struct {}) error int32;
    -> EventFooPayload(FooEvent) error int32;
};

type StructOfOptionals = struct {
    s string:<128, optional>;
    v vector<uint32>:<128, optional>;
    t box<CopyableStruct>;
};

type StructWithDefault = struct {
    @allow_deprecated_struct_defaults
    defaulted int32 = SOME_DEFAULT_VALUE;
};

const SOME_DEFAULT_VALUE int32 = 100;