1 files changed, 137 insertions, 0 deletions
diff --git a/modules/avatar/avatar_test.go b/modules/avatar/avatar_test.go
new file mode 100644
index 00000000..824a38e1
--- /dev/null
+++ b/modules/avatar/avatar_test.go
@@ -0,0 +1,137 @@
+// Copyright 2016 The Gogs Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package avatar
+
+import (
+	"bytes"
+	"image"
+	"image/png"
+	"os"
+	"testing"
+
+	"code.gitea.io/gitea/modules/setting"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func Test_RandomImageSize(t *testing.T) {
+	_, err := RandomImageSize(0, []byte("gitea@local"))
+	require.Error(t, err)
+
+	_, err = RandomImageSize(64, []byte("gitea@local"))
+	require.NoError(t, err)
+}
+
+func Test_RandomImage(t *testing.T) {
+	_, err := RandomImage([]byte("gitea@local"))
+	require.NoError(t, err)
+}
+
+func Test_ProcessAvatarPNG(t *testing.T) {
+	setting.Avatar.MaxWidth = 4096
+	setting.Avatar.MaxHeight = 4096
+
+	data, err := os.ReadFile("testdata/avatar.png")
+	require.NoError(t, err)
+
+	_, err = processAvatarImage(data, 262144)
+	require.NoError(t, err)
+}
+
+func Test_ProcessAvatarJPEG(t *testing.T) {
+	setting.Avatar.MaxWidth = 4096
+	setting.Avatar.MaxHeight = 4096
+
+	data, err := os.ReadFile("testdata/avatar.jpeg")
+	require.NoError(t, err)
+
+	_, err = processAvatarImage(data, 262144)
+	require.NoError(t, err)
+}
+
+func Test_ProcessAvatarInvalidData(t *testing.T) {
+	setting.Avatar.MaxWidth = 5
+	setting.Avatar.MaxHeight = 5
+
+	_, err := processAvatarImage([]byte{}, 12800)
+	assert.EqualError(t, err, "image.DecodeConfig: image: unknown format")
+}
+
+func Test_ProcessAvatarInvalidImageSize(t *testing.T) {
+	setting.Avatar.MaxWidth = 5
+	setting.Avatar.MaxHeight = 5
+
+	data, err := os.ReadFile("testdata/avatar.png")
+	require.NoError(t, err)
+
+	_, err = processAvatarImage(data, 12800)
+	assert.EqualError(t, err, "image width is too large: 10 > 5")
+}
+
+func Test_ProcessAvatarImage(t *testing.T) {
+	setting.Avatar.MaxWidth = 4096
+	setting.Avatar.MaxHeight = 4096
+	scaledSize := DefaultAvatarSize * setting.Avatar.RenderedSizeFactor
+
+	newImgData := func(size int, optHeight ...int) []byte {
+		width := size
+		height := size
+		if len(optHeight) == 1 {
+			height = optHeight[0]
+		}
+		img := image.NewRGBA(image.Rect(0, 0, width, height))
+		bs := bytes.Buffer{}
+		err := png.Encode(&bs, img)
+		require.NoError(t, err)
+		return bs.Bytes()
+	}
+
+	// if origin image canvas is too large, crop and resize it
+	origin := newImgData(500, 600)
+	result, err := processAvatarImage(origin, 0)
+	require.NoError(t, err)
+	assert.NotEqual(t, origin, result)
+	decoded, err := png.Decode(bytes.NewReader(result))
+	require.NoError(t, err)
+	assert.EqualValues(t, scaledSize, decoded.Bounds().Max.X)
+	assert.EqualValues(t, scaledSize, decoded.Bounds().Max.Y)
+
+	// if origin image is smaller than the default size, use the origin image
+	origin = newImgData(1)
+	result, err = processAvatarImage(origin, 0)
+	require.NoError(t, err)
+	assert.Equal(t, origin, result)
+
+	// use the origin image if the origin is smaller
+	origin = newImgData(scaledSize + 100)
+	result, err = processAvatarImage(origin, 0)
+	require.NoError(t, err)
+	assert.Less(t, len(result), len(origin))
+
+	// still use the origin image if the origin doesn't exceed the max-origin-size
+	origin = newImgData(scaledSize + 100)
+	result, err = processAvatarImage(origin, 262144)
+	require.NoError(t, err)
+	assert.Equal(t, origin, result)
+
+	// allow to use known image format (eg: webp) if it is small enough
+	origin, err = os.ReadFile("testdata/animated.webp")
+	require.NoError(t, err)
+	result, err = processAvatarImage(origin, 262144)
+	require.NoError(t, err)
+	assert.Equal(t, origin, result)
+
+	// do not support unknown image formats, eg: SVG may contain embedded JS
+	origin = []byte("<svg></svg>")
+	_, err = processAvatarImage(origin, 262144)
+	require.ErrorContains(t, err, "image: unknown format")
+
+	// make sure the canvas size limit works
+	setting.Avatar.MaxWidth = 5
+	setting.Avatar.MaxHeight = 5
+	origin = newImgData(10)
+	_, err = processAvatarImage(origin, 262144)
+	require.ErrorContains(t, err, "image width is too large: 10 > 5")
+}