diff options
Diffstat (limited to 'vendor/golang.org/x/image/bmp/reader_test.go')
-rw-r--r-- | vendor/golang.org/x/image/bmp/reader_test.go | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/vendor/golang.org/x/image/bmp/reader_test.go b/vendor/golang.org/x/image/bmp/reader_test.go new file mode 100644 index 000000000..fd6ff64f6 --- /dev/null +++ b/vendor/golang.org/x/image/bmp/reader_test.go @@ -0,0 +1,75 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package bmp + +import ( + "fmt" + "image" + "os" + "testing" + + _ "image/png" +) + +const testdataDir = "../testdata/" + +func compare(t *testing.T, img0, img1 image.Image) error { + b := img1.Bounds() + if !b.Eq(img0.Bounds()) { + return fmt.Errorf("wrong image size: want %s, got %s", img0.Bounds(), b) + } + for y := b.Min.Y; y < b.Max.Y; y++ { + for x := b.Min.X; x < b.Max.X; x++ { + c0 := img0.At(x, y) + c1 := img1.At(x, y) + r0, g0, b0, a0 := c0.RGBA() + r1, g1, b1, a1 := c1.RGBA() + if r0 != r1 || g0 != g1 || b0 != b1 || a0 != a1 { + return fmt.Errorf("pixel at (%d, %d) has wrong color: want %v, got %v", x, y, c0, c1) + } + } + } + return nil +} + +// TestDecode tests that decoding a PNG image and a BMP image result in the +// same pixel data. +func TestDecode(t *testing.T) { + testCases := []string{ + "video-001", + "yellow_rose-small", + } + + for _, tc := range testCases { + f0, err := os.Open(testdataDir + tc + ".png") + if err != nil { + t.Errorf("%s: Open PNG: %v", tc, err) + continue + } + defer f0.Close() + img0, _, err := image.Decode(f0) + if err != nil { + t.Errorf("%s: Decode PNG: %v", tc, err) + continue + } + + f1, err := os.Open(testdataDir + tc + ".bmp") + if err != nil { + t.Errorf("%s: Open BMP: %v", tc, err) + continue + } + defer f1.Close() + img1, _, err := image.Decode(f1) + if err != nil { + t.Errorf("%s: Decode BMP: %v", tc, err) + continue + } + + if err := compare(t, img0, img1); err != nil { + t.Errorf("%s: %v", tc, err) + continue + } + } +} |