package images import ( "bytes" "errors" "testing" "github.com/stretchr/testify/require" ) func TestEncode(t *testing.T) { cs := []struct { FileName string RenderSize int }{ { "elephant.jpg", 1447, }, { "rose.webp", 11119, }, { "spin.gif", 2263, }, { "status.png", 5834, }, } options := EncodeConfig{ Quality: 70, } for _, c := range cs { img, err := Decode(path + c.FileName) require.NoError(t, err) bb := bytes.NewBuffer([]byte{}) err = Encode(bb, img, options) require.NoError(t, err) require.Exactly(t, c.RenderSize, bb.Len()) } } func TestEncodeToBestSize(t *testing.T) { cs := []struct { FileName string RenderSize int Error error }{ { "elephant.jpg", 1467, nil, }, { "rose.webp", 8513, errors.New("image size after processing exceeds max, expect < '5632', received < '8513'"), }, { "spin.gif", 2407, nil, }, { "status.png", 4725, nil, }, } for _, c := range cs { img, err := Decode(path + c.FileName) require.NoError(t, err) bb := bytes.NewBuffer([]byte{}) err = EncodeToBestSize(bb, img, ResizeDimensions[0]) require.Exactly(t, c.RenderSize, bb.Len()) if c.Error != nil { require.EqualError(t, err, c.Error.Error()) } else { require.NoError(t, err) } } }