From 579058ccc08102d685db32ee819b795f15b4ab76 Mon Sep 17 00:00:00 2001
From: nfnt <janschlicht@gmail.com>
Date: Thu, 7 Jan 2016 20:34:21 +0100
Subject: [PATCH] Test for color-casts due to wrong alpha-channel scaling.

---
 resize_test.go | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/resize_test.go b/resize_test.go
index 6f69113..2ab5145 100644
--- a/resize_test.go
+++ b/resize_test.go
@@ -210,6 +210,22 @@ func Test_ResizeWithPremultipliedAlpha(t *testing.T) {
 	}
 }
 
+func Test_ResizeWithTranslucentColor(t *testing.T) {
+	img := image.NewNRGBA(image.Rect(0, 0, 1, 2))
+
+    // Set the pixel colors to an "invisible green" and white.
+    // After resizing, the green shouldn't be visible.
+	img.SetNRGBA(0, 0, color.NRGBA{0x00, 0xFF, 0x00, 0x00})
+	img.SetNRGBA(0, 1, color.NRGBA{0x00, 0x00, 0x00, 0xFF})
+
+	out := Resize(1, 1, img, Bilinear)
+
+	_, g, _, _ := out.At(0, 0).RGBA()
+	if g != 0x00 {
+		t.Errorf("%+v", g)
+	}
+}
+
 const (
 	// Use a small image size for benchmarks. We don't want memory performance
 	// to affect the benchmark results.