diff options
Diffstat (limited to 'libgo/go/image/jpeg/fuzz_test.go')
-rw-r--r-- | libgo/go/image/jpeg/fuzz_test.go | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/libgo/go/image/jpeg/fuzz_test.go b/libgo/go/image/jpeg/fuzz_test.go new file mode 100644 index 0000000..716f06f --- /dev/null +++ b/libgo/go/image/jpeg/fuzz_test.go @@ -0,0 +1,61 @@ +// Copyright 2021 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 jpeg + +import ( + "bytes" + "image" + "os" + "path/filepath" + "strings" + "testing" +) + +func FuzzDecode(f *testing.F) { + testdata, err := os.ReadDir("../testdata") + if err != nil { + f.Fatalf("failed to read testdata directory: %s", err) + } + for _, de := range testdata { + if de.IsDir() || !strings.HasSuffix(de.Name(), ".jpeg") { + continue + } + b, err := os.ReadFile(filepath.Join("../testdata", de.Name())) + if err != nil { + f.Fatalf("failed to read testdata: %s", err) + } + f.Add(b) + } + + f.Fuzz(func(t *testing.T, b []byte) { + cfg, _, err := image.DecodeConfig(bytes.NewReader(b)) + if err != nil { + return + } + if cfg.Width*cfg.Height > 1e6 { + return + } + img, typ, err := image.Decode(bytes.NewReader(b)) + if err != nil || typ != "jpeg" { + return + } + for q := 1; q <= 100; q++ { + var w bytes.Buffer + err := Encode(&w, img, &Options{Quality: q}) + if err != nil { + t.Fatalf("failed to encode valid image: %s", err) + } + img1, err := Decode(&w) + if err != nil { + t.Fatalf("failed to decode roundtripped image: %s", err) + } + got := img1.Bounds() + want := img.Bounds() + if !got.Eq(want) { + t.Fatalf("roundtripped image bounds have changed, got: %s, want: %s", got, want) + } + } + }) +} |