From 0f19f67fc98fd7117b35ea6ca1a285f94c0af769 Mon Sep 17 00:00:00 2001
From: Hajime Hoshi <hajimehoshi@gmail.com>
Date: Tue, 23 Aug 2016 00:13:44 +0900
Subject: [PATCH] image: Add ReplacePixels test

---
 image_test.go | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/image_test.go b/image_test.go
index 672df33b8..dcb386459 100644
--- a/image_test.go
+++ b/image_test.go
@@ -273,15 +273,20 @@ func TestReplacePixels(t *testing.T) {
 		t.Fatal(err)
 		return
 	}
+	// Even if p is changed after calling ReplacePixel, img0 uses the original values.
+	for i := range p {
+		p[i] = 0
+	}
 	for j := 0; j < img0.Bounds().Size().Y; j++ {
 		for i := 0; i < img0.Bounds().Size().X; i++ {
 			got := img0.At(i, j)
-			want := color.RGBA{p[4*i], p[4*i+1], p[4*i+2], p[4*i+3]}
+			want := color.RGBA{0x80, 0x80, 0x80, 0x80}
 			if got != want {
 				t.Errorf("img0 At(%d, %d): got %#v; want %#v", i, j, got, want)
 			}
 		}
 	}
+
 }
 
 func TestImageDispose(t *testing.T) {