From 6dc59ae63e3b370afa008a886339107fc0b45f7e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B8rn=20Erik=20Pedersen?=
 <bjorn.erik.pedersen@gmail.com>
Date: Wed, 7 Aug 2024 16:50:17 +0200
Subject: [PATCH] Add FuzzEncodePNG and FuzzEncodeJPG

---
 libwebp/encode_fuzz_test.go | 67 +++++++++++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 libwebp/encode_fuzz_test.go

diff --git a/libwebp/encode_fuzz_test.go b/libwebp/encode_fuzz_test.go
new file mode 100644
index 0000000..0ac49ac
--- /dev/null
+++ b/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)
+		}
+	})
+}