Files
mautrix-telegram/pkg/gotd/telegram/thumbnail/thumbnail_test.go
T
2025-06-27 20:03:37 -07:00

61 lines
1.3 KiB
Go

package thumbnail
import (
"bytes"
"image/jpeg"
"testing"
"github.com/stretchr/testify/require"
"go.mau.fi/mautrix-telegram/pkg/gotd/testutil"
)
func TestExpand(t *testing.T) {
strippedImage := []byte{
0x01, 0x0e, 0x28, 0xa3, 0x9e, 0x05, 0x26, 0x78, 0xa5, 0x03, 0x8e, 0xb4, 0xd2, 0x31, 0x40, 0x06,
0x7d, 0x85, 0x19, 0xa4, 0xe2, 0x8e, 0x28, 0x00, 0xa2, 0x8a, 0x28, 0x03,
}
t.Run("Expand", func(t *testing.T) {
a := require.New(t)
to := make([]byte, 0, 1024)
testutil.ZeroAlloc(t, func() {
var err error
to, err = ExpandTo(strippedImage, to[:0])
a.NoError(err)
})
_, err := jpeg.Decode(bytes.NewReader(to))
a.NoError(err)
})
t.Run("ExpandTwice", func(t *testing.T) {
a := require.New(t)
result, err := Expand(strippedImage)
a.NoError(err)
offset := len(result)
result, err = ExpandTo(strippedImage, result)
a.NoError(err)
a.Equal(result[:offset], result[offset:])
_, err = jpeg.Decode(bytes.NewReader(result[:offset]))
a.NoError(err)
_, err = jpeg.Decode(bytes.NewReader(result[offset:]))
a.NoError(err)
})
t.Run("InvalidPrefix", func(t *testing.T) {
a := require.New(t)
_, err := ExpandTo([]byte{0x02, 0x0e, 0x28, 0xa3}, nil)
a.Error(err)
})
t.Run("InvalidLength", func(t *testing.T) {
a := require.New(t)
_, err := ExpandTo([]byte{1, 2}, nil)
a.Error(err)
})
}