Add FuzzEncodePNG and FuzzEncodeJPG

libwebp/encode_fuzz_test.go

@@ -0,0 +1,67 @@
+package libwebp
+
+import (
+	"bytes"
+	"image/jpeg"
+	"image/png"
+	"io"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/bep/gowebp/libwebp/webpoptions"
+)
+
+func FuzzEncodePNG(f *testing.F) {
+	names := []string{"bw-gopher.png", "fuzzy-cirlcle.png"}
+	opts := webpoptions.EncodingOptions{Quality: 75}
+
+	for _, name := range names {
+		b, err := os.ReadFile(filepath.Join("..", "test_data", "images", name))
+		if err != nil {
+			f.Fatal(err)
+		}
+		f.Add(b)
+	}
+
+	f.Fuzz(func(t *testing.T, data []byte) {
+		img, err := png.Decode(bytes.NewReader(data))
+		if err != nil {
+			if img != nil {
+				t.Fatalf("img != nil, but err: %s", err)
+			}
+			return
+		}
+		err = Encode(io.Discard, img, opts)
+		if err != nil {
+			t.Fatal(err)
+		}
+	})
+}
+
+func FuzzEncodeJPG(f *testing.F) {
+	names := []string{"source.jpg", "sunset.jpg"}
+	opts := webpoptions.EncodingOptions{Quality: 75}
+
+	for _, name := range names {
+		b, err := os.ReadFile(filepath.Join("..", "test_data", "images", name))
+		if err != nil {
+			f.Fatal(err)
+		}
+		f.Add(b)
+	}
+
+	f.Fuzz(func(t *testing.T, data []byte) {
+		img, err := jpeg.Decode(bytes.NewReader(data))
+		if err != nil {
+			if img != nil {
+				t.Fatalf("img != nil, but err: %s", err)
+			}
+			return
+		}
+		err = Encode(io.Discard, img, opts)
+		if err != nil {
+			t.Fatal(err)
+		}
+	})
+}