61 lines
1.4 KiB
Go
61 lines
1.4 KiB
Go
// Copyright 2021 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package gif
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import (
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"bytes"
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"image"
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"os"
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"path/filepath"
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"strings"
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"testing"
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)
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func FuzzDecode(f *testing.F) {
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testdata, err := os.ReadDir("../testdata")
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if err != nil {
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f.Fatalf("failed to read testdata directory: %s", err)
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}
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for _, de := range testdata {
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if de.IsDir() || !strings.HasSuffix(de.Name(), ".gif") {
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continue
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}
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b, err := os.ReadFile(filepath.Join("../testdata", de.Name()))
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if err != nil {
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f.Fatalf("failed to read testdata: %s", err)
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}
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f.Add(b)
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}
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f.Fuzz(func(t *testing.T, b []byte) {
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cfg, _, err := image.DecodeConfig(bytes.NewReader(b))
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if err != nil {
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return
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}
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if cfg.Width*cfg.Height > 1e6 {
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return
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}
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img, typ, err := image.Decode(bytes.NewReader(b))
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if err != nil || typ != "gif" {
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return
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}
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for q := 1; q <= 256; q++ {
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var w bytes.Buffer
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err := Encode(&w, img, &Options{NumColors: q})
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if err != nil {
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t.Fatalf("failed to encode valid image: %s", err)
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}
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img1, err := Decode(&w)
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if err != nil {
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t.Fatalf("failed to decode roundtripped image: %s", err)
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}
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got := img1.Bounds()
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want := img.Bounds()
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if !got.Eq(want) {
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t.Fatalf("roundtripped image bounds have changed, got: %v, want: %v", got, want)
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}
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}
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})
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}
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