code review 5601054: go.image/{bmp,tiff}: move tiff/testdata to testdata.

bmp/reader_test.go

+// 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 (
+        "image"
+        "os"
+        "testing"
+
+        _ "image/png"
+)
+
+const testdataDir = "../testdata/"
+
+func compare(t *testing.T, img0, img1 image.Image) {
+        b := img1.Bounds()
+        if !b.Eq(img0.Bounds()) {
+                t.Fatalf("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 {
+                                t.Fatalf("pixel at (%d, %d) has wrong color: want %v, got %v", x, y, c0, c1)
+                        }
+                }
+        }
+}
+
+// TestDecode tests that decoding a PNG image and a BMP image result in the
+// same pixel data.
+func TestDecode(t *testing.T) {
+        f0, err := os.Open(testdataDir + "video-001.png")
+        if err != nil {
+                t.Fatal(err)
+        }
+        defer f0.Close()
+        img0, _, err := image.Decode(f0)
+        if err != nil {
+                t.Fatal(err)
+        }
+
+        f1, err := os.Open(testdataDir + "video-001.bmp")
+        if err != nil {
+                t.Fatal(err)
+        }
+        defer f1.Close()
+        img1, _, err := image.Decode(f1)
+        if err != nil {
+                t.Fatal(err)
+        }
+
+        compare(t, img0, img1)
+}