| // Copyright 2019 The Wuffs Authors. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // https://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package rac |
| |
| import ( |
| "bytes" |
| "encoding/hex" |
| "fmt" |
| "io" |
| "io/ioutil" |
| "os" |
| "strings" |
| "testing" |
| ) |
| |
| // Note that these exact bytes depends on the zlib encoder's algorithm, but |
| // there is more than one valid zlib encoding of any given input. This "compare |
| // to golden output" test is admittedly brittle, as the standard library's zlib |
| // package's output isn't necessarily stable across Go releases. |
| |
| const writerWantEmpty = "" + |
| "00000000 72 c3 63 01 30 14 00 ff 00 00 00 00 00 00 00 ee |r.c.0...........|\n" + |
| "00000010 20 00 00 00 00 00 01 ff 20 00 00 00 00 00 01 01 | ....... .......|\n" |
| |
| const writerWantILAEnd = "" + |
| "00000000 72 c3 63 00 52 72 72 53 73 41 61 61 42 62 62 62 |r.c.RrrSsAaaBbbb|\n" + |
| "00000010 43 63 63 63 63 63 63 63 63 63 31 32 72 c3 63 05 |Cccccccccc12r.c.|\n" + |
| "00000020 1d 45 00 ff 00 00 00 00 00 00 00 ff 00 00 00 00 |.E..............|\n" + |
| "00000030 00 00 00 ff 11 00 00 00 00 00 00 ff 33 00 00 00 |............3...|\n" + |
| "00000040 00 00 00 01 77 00 00 00 00 00 00 ee 04 00 00 00 |....w...........|\n" + |
| "00000050 00 00 01 ff 07 00 00 00 00 00 01 ff 09 00 00 00 |................|\n" + |
| "00000060 00 00 01 ff 0c 00 00 00 00 00 01 00 10 00 00 00 |................|\n" + |
| "00000070 00 00 01 00 7c 00 00 00 00 00 01 05 |....|.......|\n" |
| |
| const writerWantILAEndCPageSize8 = "" + |
| "00000000 72 c3 63 00 52 72 72 00 53 73 41 61 61 00 00 00 |r.c.Rrr.SsAaa...|\n" + |
| "00000010 42 62 62 62 43 63 63 63 63 63 63 63 63 63 31 32 |BbbbCccccccccc12|\n" + |
| "00000020 72 c3 63 05 90 5e 00 ff 00 00 00 00 00 00 00 ff |r.c..^..........|\n" + |
| "00000030 00 00 00 00 00 00 00 ff 11 00 00 00 00 00 00 ff |................|\n" + |
| "00000040 33 00 00 00 00 00 00 01 77 00 00 00 00 00 00 ee |3.......w.......|\n" + |
| "00000050 04 00 00 00 00 00 01 ff 08 00 00 00 00 00 01 ff |................|\n" + |
| "00000060 0a 00 00 00 00 00 01 ff 10 00 00 00 00 00 01 00 |................|\n" + |
| "00000070 14 00 00 00 00 00 01 00 80 00 00 00 00 00 01 05 |................|\n" |
| |
| const writerWantILAStart = "" + |
| "00000000 72 c3 63 05 bc dc 00 ff 00 00 00 00 00 00 00 ff |r.c.............|\n" + |
| "00000010 00 00 00 00 00 00 00 ff 11 00 00 00 00 00 00 ff |................|\n" + |
| "00000020 33 00 00 00 00 00 00 01 77 00 00 00 00 00 00 ee |3.......w.......|\n" + |
| "00000030 60 00 00 00 00 00 01 ff 63 00 00 00 00 00 01 ff |`.......c.......|\n" + |
| "00000040 65 00 00 00 00 00 01 ff 68 00 00 00 00 00 01 00 |e.......h.......|\n" + |
| "00000050 6c 00 00 00 00 00 01 00 78 00 00 00 00 00 01 05 |l.......x.......|\n" + |
| "00000060 52 72 72 53 73 41 61 61 42 62 62 62 43 63 63 63 |RrrSsAaaBbbbCccc|\n" + |
| "00000070 63 63 63 63 63 63 31 32 |cccccc12|\n" |
| |
| const writerWantILAStartCPageSize4 = "" + |
| "00000000 72 c3 63 05 fc 4c 00 ff 00 00 00 00 00 00 00 ff |r.c..L..........|\n" + |
| "00000010 00 00 00 00 00 00 00 ff 11 00 00 00 00 00 00 ff |................|\n" + |
| "00000020 33 00 00 00 00 00 00 01 77 00 00 00 00 00 00 ee |3.......w.......|\n" + |
| "00000030 60 00 00 00 00 00 01 ff 64 00 00 00 00 00 01 ff |`.......d.......|\n" + |
| "00000040 68 00 00 00 00 00 01 ff 6c 00 00 00 00 00 01 00 |h.......l.......|\n" + |
| "00000050 70 00 00 00 00 00 01 00 7c 00 00 00 00 00 01 05 |p.......|.......|\n" + |
| "00000060 52 72 72 00 53 73 00 00 41 61 61 00 42 62 62 62 |Rrr.Ss..Aaa.Bbbb|\n" + |
| "00000070 43 63 63 63 63 63 63 63 63 63 31 32 |Cccccccccc12|\n" |
| |
| const writerWantILAStartCPageSize128 = "" + |
| "00000000 72 c3 63 05 d8 df 00 ff 00 00 00 00 00 00 00 ff |r.c.............|\n" + |
| "00000010 00 00 00 00 00 00 00 ff 11 00 00 00 00 00 00 ff |................|\n" + |
| "00000020 33 00 00 00 00 00 00 01 77 00 00 00 00 00 00 ee |3.......w.......|\n" + |
| "00000030 80 00 00 00 00 00 01 ff 83 00 00 00 00 00 01 ff |................|\n" + |
| "00000040 85 00 00 00 00 00 01 ff 88 00 00 00 00 00 01 00 |................|\n" + |
| "00000050 8c 00 00 00 00 00 01 00 98 00 00 00 00 00 01 05 |................|\n" + |
| "00000060 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|\n" + |
| "00000070 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|\n" + |
| "00000080 52 72 72 53 73 41 61 61 42 62 62 62 43 63 63 63 |RrrSsAaaBbbbCccc|\n" + |
| "00000090 63 63 63 63 63 63 31 32 |cccccc12|\n" |
| |
| func TestWriterILAEndEmpty(t *testing.T) { |
| if err := testWriter(IndexLocationAtEnd, nil, 0, true); err != nil { |
| t.Fatal(err) |
| } |
| } |
| |
| func TestWriterILAStartEmpty(t *testing.T) { |
| tempFile := &bytes.Buffer{} |
| if err := testWriter(IndexLocationAtStart, tempFile, 0, true); err != nil { |
| t.Fatal(err) |
| } |
| } |
| |
| func TestWriterILAEndNoTempFile(t *testing.T) { |
| if err := testWriter(IndexLocationAtEnd, nil, 0, false); err != nil { |
| t.Fatal(err) |
| } |
| } |
| |
| func TestWriterILAEndMemTempFile(t *testing.T) { |
| tempFile := &bytes.Buffer{} |
| if err := testWriter(IndexLocationAtEnd, tempFile, 0, false); err == nil { |
| t.Fatal("err: got nil, want non-nil") |
| } else if !strings.HasPrefix(err.Error(), "rac: IndexLocationAtEnd requires") { |
| t.Fatal(err) |
| } |
| } |
| |
| func TestWriterILAStartNoTempFile(t *testing.T) { |
| if err := testWriter(IndexLocationAtStart, nil, 0, false); err == nil { |
| t.Fatal("err: got nil, want non-nil") |
| } else if !strings.HasPrefix(err.Error(), "rac: IndexLocationAtStart requires") { |
| t.Fatal(err) |
| } |
| } |
| |
| func TestWriterILAStartMemTempFile(t *testing.T) { |
| tempFile := &bytes.Buffer{} |
| if err := testWriter(IndexLocationAtStart, tempFile, 0, false); err != nil { |
| t.Fatal(err) |
| } |
| } |
| |
| func TestWriterILAStartRealTempFile(t *testing.T) { |
| f, err := ioutil.TempFile("", "rac_test") |
| if err != nil { |
| t.Fatalf("TempFile: %v", err) |
| } |
| defer os.Remove(f.Name()) |
| defer f.Close() |
| |
| if err := testWriter(IndexLocationAtStart, f, 0, false); err != nil { |
| t.Fatal(err) |
| } |
| } |
| |
| func TestWriterILAEndCPageSize8(t *testing.T) { |
| if err := testWriter(IndexLocationAtEnd, nil, 8, false); err != nil { |
| t.Fatal(err) |
| } |
| } |
| |
| func TestWriterILAStartCPageSize4(t *testing.T) { |
| tempFile := &bytes.Buffer{} |
| if err := testWriter(IndexLocationAtStart, tempFile, 4, false); err != nil { |
| t.Fatal(err) |
| } |
| } |
| |
| func TestWriterILAStartCPageSize128(t *testing.T) { |
| tempFile := &bytes.Buffer{} |
| if err := testWriter(IndexLocationAtStart, tempFile, 128, false); err != nil { |
| t.Fatal(err) |
| } |
| } |
| |
| func testWriter(iloc IndexLocation, tempFile io.ReadWriter, cPageSize uint64, empty bool) error { |
| buf := &bytes.Buffer{} |
| const fakeCodec = Codec(0xEE) |
| w := &Writer{ |
| Writer: buf, |
| Codec: fakeCodec, |
| IndexLocation: iloc, |
| TempFile: tempFile, |
| CPageSize: cPageSize, |
| } |
| |
| if !empty { |
| // We ignore errors (assigning them to _) from the AddXxx calls. Any |
| // non-nil errors are sticky, and should be returned by Close. |
| res0, _ := w.AddResource([]byte("Rrr")) |
| res1, _ := w.AddResource([]byte("Ss")) |
| _ = w.AddChunk(0x11, []byte("Aaa"), 0, 0) |
| _ = w.AddChunk(0x22, []byte("Bbbb"), res0, 0) |
| _ = w.AddChunk(0x44, []byte("Cccccccccc12"), res0, res1) |
| } |
| |
| if err := w.Close(); err != nil { |
| return err |
| } |
| got := hex.Dump(buf.Bytes()) |
| |
| want := "" |
| switch { |
| case empty: |
| want = writerWantEmpty |
| case (iloc == IndexLocationAtEnd) && (cPageSize == 0): |
| want = writerWantILAEnd |
| case (iloc == IndexLocationAtEnd) && (cPageSize == 8): |
| want = writerWantILAEndCPageSize8 |
| case (iloc == IndexLocationAtStart) && (cPageSize == 0): |
| want = writerWantILAStart |
| case (iloc == IndexLocationAtStart) && (cPageSize == 4): |
| want = writerWantILAStartCPageSize4 |
| case (iloc == IndexLocationAtStart) && (cPageSize == 128): |
| want = writerWantILAStartCPageSize128 |
| default: |
| return fmt.Errorf("unsupported iloc/cPageSize combination") |
| } |
| |
| if got != want { |
| return fmt.Errorf("\ngot:\n%s\nwant:\n%s", got, want) |
| } |
| return nil |
| } |