| // Copyright 2016 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package flate |
| |
| import ( |
| "bytes" |
| "flag" |
| "fmt" |
| "io/ioutil" |
| "os" |
| "path/filepath" |
| "strings" |
| "testing" |
| ) |
| |
| var update = flag.Bool("update", false, "update reference files") |
| |
| // TestBlockHuff tests huffman encoding against reference files |
| // to detect possible regressions. |
| // If encoding/bit allocation changes you can regenerate these files |
| // by using the -update flag. |
| func TestBlockHuff(t *testing.T) { |
| // determine input files |
| match, err := filepath.Glob("testdata/huffman-*.in") |
| if err != nil { |
| t.Fatal(err) |
| } |
| |
| for _, in := range match { |
| out := in // for files where input and output are identical |
| if strings.HasSuffix(in, ".in") { |
| out = in[:len(in)-len(".in")] + ".golden" |
| } |
| testBlockHuff(t, in, out) |
| } |
| } |
| |
| func testBlockHuff(t *testing.T, in, out string) { |
| all, err := ioutil.ReadFile(in) |
| if err != nil { |
| t.Error(err) |
| return |
| } |
| var buf bytes.Buffer |
| bw := newHuffmanBitWriter(&buf) |
| bw.writeBlockHuff(false, all) |
| bw.flush() |
| got := buf.Bytes() |
| |
| want, err := ioutil.ReadFile(out) |
| if err != nil && !*update { |
| t.Error(err) |
| return |
| } |
| |
| t.Logf("Testing %q", in) |
| if !bytes.Equal(got, want) { |
| if *update { |
| if in != out { |
| t.Logf("Updating %q", out) |
| if err := ioutil.WriteFile(out, got, 0666); err != nil { |
| t.Error(err) |
| } |
| return |
| } |
| // in == out: don't accidentally destroy input |
| t.Errorf("WARNING: -update did not rewrite input file %s", in) |
| } |
| |
| t.Errorf("%q != %q (see %q)", in, out, in+".got") |
| if err := ioutil.WriteFile(in+".got", got, 0666); err != nil { |
| t.Error(err) |
| } |
| return |
| } |
| t.Log("Output ok") |
| |
| // Test if the writer produces the same output after reset. |
| buf.Reset() |
| bw.reset(&buf) |
| bw.writeBlockHuff(false, all) |
| bw.flush() |
| got = buf.Bytes() |
| if !bytes.Equal(got, want) { |
| t.Errorf("after reset %q != %q (see %q)", in, out, in+".reset.got") |
| if err := ioutil.WriteFile(in+".reset.got", got, 0666); err != nil { |
| t.Error(err) |
| } |
| return |
| } |
| t.Log("Reset ok") |
| testWriterEOF(t, "huff", huffTest{input: in}, true) |
| } |
| |
| type huffTest struct { |
| tokens []token |
| input string // File name of input data matching the tokens. |
| want string // File name of data with the expected output with input available. |
| wantNoInput string // File name of the expected output when no input is available. |
| } |
| |
| const ml = 0x7fc00000 // Maximum length token. Used to reduce the size of writeBlockTests |
| |
| var writeBlockTests = []huffTest{ |
| { |
| input: "testdata/huffman-null-max.in", |
| want: "testdata/huffman-null-max.%s.expect", |
| wantNoInput: "testdata/huffman-null-max.%s.expect-noinput", |
| tokens: []token{0x0, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, 0x0, 0x0}, |
| }, |
| { |
| input: "testdata/huffman-pi.in", |
| want: "testdata/huffman-pi.%s.expect", |
| wantNoInput: "testdata/huffman-pi.%s.expect-noinput", |
| tokens: []token{0x33, 0x2e, 0x31, 0x34, 0x31, 0x35, 0x39, 0x32, 0x36, 0x35, 0x33, 0x35, 0x38, 0x39, 0x37, 0x39, 0x33, 0x32, 0x33, 0x38, 0x34, 0x36, 0x32, 0x36, 0x34, 0x33, 0x33, 0x38, 0x33, 0x32, 0x37, 0x39, 0x35, 0x30, 0x32, 0x38, 0x38, 0x34, 0x31, 0x39, 0x37, 0x31, 0x36, 0x39, 0x33, 0x39, 0x39, 0x33, 0x37, 0x35, 0x31, 0x30, 0x35, 0x38, 0x32, 0x30, 0x39, 0x37, 0x34, 0x39, 0x34, 0x34, 0x35, 0x39, 0x32, 0x33, 0x30, 0x37, 0x38, 0x31, 0x36, 0x34, 0x30, 0x36, 0x32, 0x38, 0x36, 0x32, 0x30, 0x38, 0x39, 0x39, 0x38, 0x36, 0x32, 0x38, 0x30, 0x33, 0x34, 0x38, 0x32, 0x35, 0x33, 0x34, 0x32, 0x31, 0x31, 0x37, 0x30, 0x36, 0x37, 0x39, 0x38, 0x32, 0x31, 0x34, 0x38, 0x30, 0x38, 0x36, 0x35, 0x31, 0x33, 0x32, 0x38, 0x32, 0x33, 0x30, 0x36, 0x36, 0x34, 0x37, 0x30, 0x39, 0x33, 0x38, 0x34, 0x34, 0x36, 0x30, 0x39, 0x35, 0x35, 0x30, 0x35, 0x38, 0x32, 0x32, 0x33, 0x31, 0x37, 0x32, 0x35, 0x33, 0x35, 0x39, 0x34, 0x30, 0x38, 0x31, 0x32, 0x38, 0x34, 0x38, 0x31, 0x31, 0x31, 0x37, 0x34, 0x4040007e, 0x34, 0x31, 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| }, |
| { |
| input: "testdata/huffman-rand-1k.in", |
| want: "testdata/huffman-rand-1k.%s.expect", |
| wantNoInput: "testdata/huffman-rand-1k.%s.expect-noinput", |
| tokens: []token{0xf8, 0x8b, 0x96, 0x76, 0x48, 0xd, 0x85, 0x94, 0x25, 0x80, 0xaf, 0xc2, 0xfe, 0x8d, 0xe8, 0x20, 0xeb, 0x17, 0x86, 0xc9, 0xb7, 0xc5, 0xde, 0x6, 0xea, 0x7d, 0x18, 0x8b, 0xe7, 0x3e, 0x7, 0xda, 0xdf, 0xff, 0x6c, 0x73, 0xde, 0xcc, 0xe7, 0x6d, 0x8d, 0x4, 0x19, 0x49, 0x7f, 0x47, 0x1f, 0x48, 0x15, 0xb0, 0xe8, 0x9e, 0xf2, 0x31, 0x59, 0xde, 0x34, 0xb4, 0x5b, 0xe5, 0xe0, 0x9, 0x11, 0x30, 0xc2, 0x88, 0x5b, 0x7c, 0x5d, 0x14, 0x13, 0x6f, 0x23, 0xa9, 0xd, 0xbc, 0x2d, 0x23, 0xbe, 0xd9, 0xed, 0x75, 0x4, 0x6c, 0x99, 0xdf, 0xfd, 0x70, 0x66, 0xe6, 0xee, 0xd9, 0xb1, 0x9e, 0x6e, 0x83, 0x59, 0xd5, 0xd4, 0x80, 0x59, 0x98, 0x77, 0x89, 0x43, 0x38, 0xc9, 0xaf, 0x30, 0x32, 0x9a, 0x20, 0x1b, 0x46, 0x3d, 0x67, 0x6e, 0xd7, 0x72, 0x9e, 0x4e, 0x21, 0x4f, 0xc6, 0xe0, 0xd4, 0x7b, 0x4, 0x8d, 0xa5, 0x3, 0xf6, 0x5, 0x9b, 0x6b, 0xdc, 0x2a, 0x93, 0x77, 0x28, 0xfd, 0xb4, 0x62, 0xda, 0x20, 0xe7, 0x1f, 0xab, 0x6b, 0x51, 0x43, 0x39, 0x2f, 0xa0, 0x92, 0x1, 0x6c, 0x75, 0x3e, 0xf4, 0x35, 0xfd, 0x43, 0x2e, 0xf7, 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| }, |
| { |
| input: "testdata/huffman-rand-limit.in", |
| want: "testdata/huffman-rand-limit.%s.expect", |
| wantNoInput: "testdata/huffman-rand-limit.%s.expect-noinput", |
| tokens: []token{0x61, 0x51c00000, 0xa, 0xf8, 0x8b, 0x96, 0x76, 0x48, 0xa, 0x85, 0x94, 0x25, 0x80, 0xaf, 0xc2, 0xfe, 0x8d, 0xe8, 0x20, 0xeb, 0x17, 0x86, 0xc9, 0xb7, 0xc5, 0xde, 0x6, 0xea, 0x7d, 0x18, 0x8b, 0xe7, 0x3e, 0x7, 0xda, 0xdf, 0xff, 0x6c, 0x73, 0xde, 0xcc, 0xe7, 0x6d, 0x8d, 0x4, 0x19, 0x49, 0x7f, 0x47, 0x1f, 0x48, 0x15, 0xb0, 0xe8, 0x9e, 0xf2, 0x31, 0x59, 0xde, 0x34, 0xb4, 0x5b, 0xe5, 0xe0, 0x9, 0x11, 0x30, 0xc2, 0x88, 0x5b, 0x7c, 0x5d, 0x14, 0x13, 0x6f, 0x23, 0xa9, 0xa, 0xbc, 0x2d, 0x23, 0xbe, 0xd9, 0xed, 0x75, 0x4, 0x6c, 0x99, 0xdf, 0xfd, 0x70, 0x66, 0xe6, 0xee, 0xd9, 0xb1, 0x9e, 0x6e, 0x83, 0x59, 0xd5, 0xd4, 0x80, 0x59, 0x98, 0x77, 0x89, 0x43, 0x38, 0xc9, 0xaf, 0x30, 0x32, 0x9a, 0x20, 0x1b, 0x46, 0x3d, 0x67, 0x6e, 0xd7, 0x72, 0x9e, 0x4e, 0x21, 0x4f, 0xc6, 0xe0, 0xd4, 0x7b, 0x4, 0x8d, 0xa5, 0x3, 0xf6, 0x5, 0x9b, 0x6b, 0xdc, 0x2a, 0x93, 0x77, 0x28, 0xfd, 0xb4, 0x62, 0xda, 0x20, 0xe7, 0x1f, 0xab, 0x6b, 0x51, 0x43, 0x39, 0x2f, 0xa0, 0x92, 0x1, 0x6c, 0x75, 0x3e, 0xf4, 0x35, 0xfd, 0x43, 0x2e, 0xf7, 0xa4, 0x75, 0xda, 0xea, 0x9b, 0xa}, |
| }, |
| { |
| input: "testdata/huffman-shifts.in", |
| want: "testdata/huffman-shifts.%s.expect", |
| wantNoInput: "testdata/huffman-shifts.%s.expect-noinput", |
| tokens: []token{0x31, 0x30, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x52400001, 0xd, 0xa, 0x32, 0x33, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7fc00001, 0x7f400001}, |
| }, |
| { |
| input: "testdata/huffman-text-shift.in", |
| want: "testdata/huffman-text-shift.%s.expect", |
| wantNoInput: "testdata/huffman-text-shift.%s.expect-noinput", |
| tokens: []token{0x2f, 0x2f, 0x43, 0x6f, 0x70, 0x79, 0x72, 0x69, 0x67, 0x68, 0x74, 0x32, 0x30, 0x30, 0x39, 0x54, 0x68, 0x47, 0x6f, 0x41, 0x75, 0x74, 0x68, 0x6f, 0x72, 0x2e, 0x41, 0x6c, 0x6c, 0x40800016, 0x72, 0x72, 0x76, 0x64, 0x2e, 0xd, 0xa, 0x2f, 0x2f, 0x55, 0x6f, 0x66, 0x74, 0x68, 0x69, 0x6f, 0x75, 0x72, 0x63, 0x63, 0x6f, 0x64, 0x69, 0x67, 0x6f, 0x76, 0x72, 0x6e, 0x64, 0x62, 0x79, 0x42, 0x53, 0x44, 0x2d, 0x74, 0x79, 0x6c, 0x40400020, 0x6c, 0x69, 0x63, 0x6e, 0x74, 0x68, 0x74, 0x63, 0x6e, 0x62, 0x66, 0x6f, 0x75, 0x6e, 0x64, 0x69, 0x6e, 0x74, 0x68, 0x4c, 0x49, 0x43, 0x45, 0x4e, 0x53, 0x45, 0x66, 0x69, 0x6c, 0x2e, 0xd, 0xa, 0xd, 0xa, 0x70, 0x63, 0x6b, 0x67, 0x6d, 0x69, 0x6e, 0x4040000a, 0x69, 0x6d, 0x70, 0x6f, 0x72, 0x74, 0x22, 0x6f, 0x22, 0x4040000c, 0x66, 0x75, 0x6e, 0x63, 0x6d, 0x69, 0x6e, 0x28, 0x29, 0x7b, 0xd, 0xa, 0x9, 0x76, 0x72, 0x62, 0x3d, 0x6d, 0x6b, 0x28, 0x5b, 0x5d, 0x62, 0x79, 0x74, 0x2c, 0x36, 0x35, 0x35, 0x33, 0x35, 0x29, 0xd, 0xa, 0x9, 0x66, 0x2c, 0x5f, 0x3a, 0x3d, 0x6f, 0x2e, 0x43, 0x72, 0x74, 0x28, 0x22, 0x68, 0x75, 0x66, 0x66, 0x6d, 0x6e, 0x2d, 0x6e, 0x75, 0x6c, 0x6c, 0x2d, 0x6d, 0x78, 0x2e, 0x69, 0x6e, 0x22, 0x40800021, 0x2e, 0x57, 0x72, 0x69, 0x74, 0x28, 0x62, 0x29, 0xd, 0xa, 0x7d, 0xd, 0xa, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x58, 0x78, 0x79, 0x7a, 0x21, 0x22, 0x23, 0xc2, 0xa4, 0x25, 0x26, 0x2f, 0x3f, 0x22}, |
| }, |
| { |
| input: "testdata/huffman-text.in", |
| want: "testdata/huffman-text.%s.expect", |
| wantNoInput: "testdata/huffman-text.%s.expect-noinput", |
| tokens: []token{0x2f, 0x2f, 0x20, 0x43, 0x6f, 0x70, 0x79, 0x72, 0x69, 0x67, 0x68, 0x74, 0x20, 0x32, 0x30, 0x30, 0x39, 0x20, 0x54, 0x68, 0x65, 0x20, 0x47, 0x6f, 0x20, 0x41, 0x75, 0x74, 0x68, 0x6f, 0x72, 0x73, 0x2e, 0x20, 0x41, 0x6c, 0x6c, 0x20, 0x4080001e, 0x73, 0x20, 0x72, 0x65, 0x73, 0x65, 0x72, 0x76, 0x65, 0x64, 0x2e, 0xd, 0xa, 0x2f, 0x2f, 0x20, 0x55, 0x73, 0x65, 0x20, 0x6f, 0x66, 0x20, 0x74, 0x68, 0x69, 0x73, 0x20, 0x73, 0x6f, 0x75, 0x72, 0x63, 0x65, 0x20, 0x63, 0x6f, 0x64, 0x65, 0x20, 0x69, 0x73, 0x20, 0x67, 0x6f, 0x76, 0x65, 0x72, 0x6e, 0x65, 0x64, 0x20, 0x62, 0x79, 0x20, 0x61, 0x20, 0x42, 0x53, 0x44, 0x2d, 0x73, 0x74, 0x79, 0x6c, 0x65, 0x40800036, 0x6c, 0x69, 0x63, 0x65, 0x6e, 0x73, 0x65, 0x20, 0x74, 0x68, 0x61, 0x74, 0x20, 0x63, 0x61, 0x6e, 0x20, 0x62, 0x65, 0x20, 0x66, 0x6f, 0x75, 0x6e, 0x64, 0x20, 0x69, 0x6e, 0x20, 0x74, 0x68, 0x65, 0x20, 0x4c, 0x49, 0x43, 0x45, 0x4e, 0x53, 0x45, 0x20, 0x66, 0x69, 0x6c, 0x65, 0x2e, 0xd, 0xa, 0xd, 0xa, 0x70, 0x61, 0x63, 0x6b, 0x61, 0x67, 0x65, 0x20, 0x6d, 0x61, 0x69, 0x6e, 0x4040000f, 0x69, 0x6d, 0x70, 0x6f, 0x72, 0x74, 0x20, 0x22, 0x6f, 0x73, 0x22, 0x4040000e, 0x66, 0x75, 0x6e, 0x63, 0x4080001b, 0x28, 0x29, 0x20, 0x7b, 0xd, 0xa, 0x9, 0x76, 0x61, 0x72, 0x20, 0x62, 0x20, 0x3d, 0x20, 0x6d, 0x61, 0x6b, 0x65, 0x28, 0x5b, 0x5d, 0x62, 0x79, 0x74, 0x65, 0x2c, 0x20, 0x36, 0x35, 0x35, 0x33, 0x35, 0x29, 0xd, 0xa, 0x9, 0x66, 0x2c, 0x20, 0x5f, 0x20, 0x3a, 0x3d, 0x20, 0x6f, 0x73, 0x2e, 0x43, 0x72, 0x65, 0x61, 0x74, 0x65, 0x28, 0x22, 0x68, 0x75, 0x66, 0x66, 0x6d, 0x61, 0x6e, 0x2d, 0x6e, 0x75, 0x6c, 0x6c, 0x2d, 0x6d, 0x61, 0x78, 0x2e, 0x69, 0x6e, 0x22, 0x4080002a, 0x2e, 0x57, 0x72, 0x69, 0x74, 0x65, 0x28, 0x62, 0x29, 0xd, 0xa, 0x7d, 0xd, 0xa}, |
| }, |
| { |
| input: "testdata/huffman-zero.in", |
| want: "testdata/huffman-zero.%s.expect", |
| wantNoInput: "testdata/huffman-zero.%s.expect-noinput", |
| tokens: []token{0x30, ml, 0x4b800000}, |
| }, |
| { |
| input: "", |
| want: "", |
| wantNoInput: "testdata/null-long-match.%s.expect-noinput", |
| tokens: []token{0x0, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, ml, 0x41400000}, |
| }, |
| } |
| |
| // TestWriteBlock tests if the writeBlock encoding has changed. |
| // To update the reference files use the "-update" flag on the test. |
| func TestWriteBlock(t *testing.T) { |
| for _, test := range writeBlockTests { |
| testBlock(t, test, "wb") |
| } |
| } |
| |
| // TestWriteBlockDynamic tests if the writeBlockDynamic encoding has changed. |
| // To update the reference files use the "-update" flag on the test. |
| func TestWriteBlockDynamic(t *testing.T) { |
| for _, test := range writeBlockTests { |
| testBlock(t, test, "dyn") |
| } |
| } |
| |
| // testBlock tests a block against its references, |
| // or regenerate the references, if "-update" flag is set. |
| func testBlock(t *testing.T, test huffTest, ttype string) { |
| if test.want != "" { |
| test.want = fmt.Sprintf(test.want, ttype) |
| } |
| test.wantNoInput = fmt.Sprintf(test.wantNoInput, ttype) |
| if *update { |
| if test.input != "" { |
| t.Logf("Updating %q", test.want) |
| input, err := ioutil.ReadFile(test.input) |
| if err != nil { |
| t.Error(err) |
| return |
| } |
| |
| f, err := os.Create(test.want) |
| if err != nil { |
| t.Error(err) |
| return |
| } |
| defer f.Close() |
| bw := newHuffmanBitWriter(f) |
| writeToType(t, ttype, bw, test.tokens, input) |
| } |
| |
| t.Logf("Updating %q", test.wantNoInput) |
| f, err := os.Create(test.wantNoInput) |
| if err != nil { |
| t.Error(err) |
| return |
| } |
| defer f.Close() |
| bw := newHuffmanBitWriter(f) |
| writeToType(t, ttype, bw, test.tokens, nil) |
| return |
| } |
| |
| if test.input != "" { |
| t.Logf("Testing %q", test.want) |
| input, err := ioutil.ReadFile(test.input) |
| if err != nil { |
| t.Error(err) |
| return |
| } |
| want, err := ioutil.ReadFile(test.want) |
| if err != nil { |
| t.Error(err) |
| return |
| } |
| var buf bytes.Buffer |
| bw := newHuffmanBitWriter(&buf) |
| writeToType(t, ttype, bw, test.tokens, input) |
| |
| got := buf.Bytes() |
| if !bytes.Equal(got, want) { |
| t.Errorf("writeBlock did not yield expected result for file %q with input. See %q", test.want, test.want+".got") |
| if err := ioutil.WriteFile(test.want+".got", got, 0666); err != nil { |
| t.Error(err) |
| } |
| } |
| t.Log("Output ok") |
| |
| // Test if the writer produces the same output after reset. |
| buf.Reset() |
| bw.reset(&buf) |
| writeToType(t, ttype, bw, test.tokens, input) |
| bw.flush() |
| got = buf.Bytes() |
| if !bytes.Equal(got, want) { |
| t.Errorf("reset: writeBlock did not yield expected result for file %q with input. See %q", test.want, test.want+".reset.got") |
| if err := ioutil.WriteFile(test.want+".reset.got", got, 0666); err != nil { |
| t.Error(err) |
| } |
| return |
| } |
| t.Log("Reset ok") |
| testWriterEOF(t, "wb", test, true) |
| } |
| t.Logf("Testing %q", test.wantNoInput) |
| wantNI, err := ioutil.ReadFile(test.wantNoInput) |
| if err != nil { |
| t.Error(err) |
| return |
| } |
| var buf bytes.Buffer |
| bw := newHuffmanBitWriter(&buf) |
| writeToType(t, ttype, bw, test.tokens, nil) |
| |
| got := buf.Bytes() |
| if !bytes.Equal(got, wantNI) { |
| t.Errorf("writeBlock did not yield expected result for file %q with input. See %q", test.wantNoInput, test.wantNoInput+".got") |
| if err := ioutil.WriteFile(test.want+".got", got, 0666); err != nil { |
| t.Error(err) |
| } |
| } else if got[0]&1 == 1 { |
| t.Error("got unexpected EOF") |
| return |
| } |
| |
| t.Log("Output ok") |
| |
| // Test if the writer produces the same output after reset. |
| buf.Reset() |
| bw.reset(&buf) |
| writeToType(t, ttype, bw, test.tokens, nil) |
| bw.flush() |
| got = buf.Bytes() |
| if !bytes.Equal(got, wantNI) { |
| t.Errorf("reset: writeBlock did not yield expected result for file %q without input. See %q", test.want, test.want+".reset.got") |
| if err := ioutil.WriteFile(test.want+".reset.got", got, 0666); err != nil { |
| t.Error(err) |
| } |
| return |
| } |
| t.Log("Reset ok") |
| testWriterEOF(t, "wb", test, false) |
| } |
| |
| func writeToType(t *testing.T, ttype string, bw *huffmanBitWriter, tok []token, input []byte) { |
| switch ttype { |
| case "wb": |
| bw.writeBlock(tok, false, input) |
| case "dyn": |
| bw.writeBlockDynamic(tok, false, input) |
| default: |
| panic("unknown test type") |
| } |
| |
| if bw.err != nil { |
| t.Error(bw.err) |
| return |
| } |
| |
| bw.flush() |
| if bw.err != nil { |
| t.Error(bw.err) |
| return |
| } |
| } |
| |
| // testWriterEOF tests if the written block contains an EOF marker. |
| func testWriterEOF(t *testing.T, ttype string, test huffTest, useInput bool) { |
| if useInput && test.input == "" { |
| return |
| } |
| var input []byte |
| if useInput { |
| var err error |
| input, err = ioutil.ReadFile(test.input) |
| if err != nil { |
| t.Error(err) |
| return |
| } |
| } |
| var buf bytes.Buffer |
| bw := newHuffmanBitWriter(&buf) |
| switch ttype { |
| case "wb": |
| bw.writeBlock(test.tokens, true, input) |
| case "dyn": |
| bw.writeBlockDynamic(test.tokens, true, input) |
| case "huff": |
| bw.writeBlockHuff(true, input) |
| default: |
| panic("unknown test type") |
| } |
| if bw.err != nil { |
| t.Error(bw.err) |
| return |
| } |
| |
| bw.flush() |
| if bw.err != nil { |
| t.Error(bw.err) |
| return |
| } |
| b := buf.Bytes() |
| if len(b) == 0 { |
| t.Error("no output received") |
| return |
| } |
| if b[0]&1 != 1 { |
| t.Errorf("block not marked with EOF for input %q", test.input) |
| return |
| } |
| t.Log("EOF ok") |
| } |
