From 87f723015c051c57ce5595d57de259251233f7ad Mon Sep 17 00:00:00 2001
From: minodisk <daisuke.mino@gmail.com>
Date: Mon, 25 May 2015 18:53:05 +0900
Subject: [PATCH] Test same color with some color modes

---
 resize_test.go | 92 +++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 91 insertions(+), 1 deletion(-)

diff --git a/resize_test.go b/resize_test.go
index 0c6093b..6f69113 100644
--- a/resize_test.go
+++ b/resize_test.go
@@ -58,7 +58,97 @@ func Test_SameColorWithRGBA(t *testing.T) {
 		for x := out.Bounds().Min.X; x < out.Bounds().Max.X; x++ {
 			color := out.At(x, y).(color.NRGBA)
 			if color.R != 0x80 || color.G != 0x80 || color.B != 0x80 || color.A != 0xFF {
-				t.Fail()
+				t.Errorf("%+v", color)
+			}
+		}
+	}
+}
+
+func Test_SameColorWithNRGBA(t *testing.T) {
+	img := image.NewNRGBA(image.Rect(0, 0, 20, 20))
+	for y := img.Bounds().Min.Y; y < img.Bounds().Max.Y; y++ {
+		for x := img.Bounds().Min.X; x < img.Bounds().Max.X; x++ {
+			img.SetNRGBA(x, y, color.NRGBA{0x80, 0x80, 0x80, 0xFF})
+		}
+	}
+	out := Resize(10, 10, img, Lanczos3)
+	for y := out.Bounds().Min.Y; y < out.Bounds().Max.Y; y++ {
+		for x := out.Bounds().Min.X; x < out.Bounds().Max.X; x++ {
+			color := out.At(x, y).(color.NRGBA)
+			if color.R != 0x80 || color.G != 0x80 || color.B != 0x80 || color.A != 0xFF {
+				t.Errorf("%+v", color)
+			}
+		}
+	}
+}
+
+func Test_SameColorWithRGBA64(t *testing.T) {
+	img := image.NewRGBA64(image.Rect(0, 0, 20, 20))
+	for y := img.Bounds().Min.Y; y < img.Bounds().Max.Y; y++ {
+		for x := img.Bounds().Min.X; x < img.Bounds().Max.X; x++ {
+			img.SetRGBA64(x, y, color.RGBA64{0x8000, 0x8000, 0x8000, 0xFFFF})
+		}
+	}
+	out := Resize(10, 10, img, Lanczos3)
+	for y := out.Bounds().Min.Y; y < out.Bounds().Max.Y; y++ {
+		for x := out.Bounds().Min.X; x < out.Bounds().Max.X; x++ {
+			color := out.At(x, y).(color.NRGBA64)
+			if color.R != 0x8000 || color.G != 0x8000 || color.B != 0x8000 || color.A != 0xFFFF {
+				t.Errorf("%+v", color)
+			}
+		}
+	}
+}
+
+func Test_SameColorWithNRGBA64(t *testing.T) {
+	img := image.NewNRGBA64(image.Rect(0, 0, 20, 20))
+	for y := img.Bounds().Min.Y; y < img.Bounds().Max.Y; y++ {
+		for x := img.Bounds().Min.X; x < img.Bounds().Max.X; x++ {
+			img.SetNRGBA64(x, y, color.NRGBA64{0x8000, 0x8000, 0x8000, 0xFFFF})
+		}
+	}
+	out := Resize(10, 10, img, Lanczos3)
+	for y := out.Bounds().Min.Y; y < out.Bounds().Max.Y; y++ {
+		for x := out.Bounds().Min.X; x < out.Bounds().Max.X; x++ {
+			color := out.At(x, y).(color.NRGBA64)
+			if color.R != 0x8000 || color.G != 0x8000 || color.B != 0x8000 || color.A != 0xFFFF {
+				t.Errorf("%+v", color)
+			}
+		}
+	}
+}
+
+func Test_SameColorWithGray(t *testing.T) {
+	img := image.NewGray(image.Rect(0, 0, 20, 20))
+	for y := img.Bounds().Min.Y; y < img.Bounds().Max.Y; y++ {
+		for x := img.Bounds().Min.X; x < img.Bounds().Max.X; x++ {
+			img.SetGray(x, y, color.Gray{0x80})
+		}
+	}
+	out := Resize(10, 10, img, Lanczos3)
+	for y := out.Bounds().Min.Y; y < out.Bounds().Max.Y; y++ {
+		for x := out.Bounds().Min.X; x < out.Bounds().Max.X; x++ {
+			color := out.At(x, y).(color.Gray)
+			if color.Y != 0x80 {
+				t.Errorf("%+v", color)
+			}
+		}
+	}
+}
+
+func Test_SameColorWithGray16(t *testing.T) {
+	img := image.NewGray16(image.Rect(0, 0, 20, 20))
+	for y := img.Bounds().Min.Y; y < img.Bounds().Max.Y; y++ {
+		for x := img.Bounds().Min.X; x < img.Bounds().Max.X; x++ {
+			img.SetGray16(x, y, color.Gray16{0x8000})
+		}
+	}
+	out := Resize(10, 10, img, Lanczos3)
+	for y := out.Bounds().Min.Y; y < out.Bounds().Max.Y; y++ {
+		for x := out.Bounds().Min.X; x < out.Bounds().Max.X; x++ {
+			color := out.At(x, y).(color.Gray16)
+			if color.Y != 0x8000 {
+				t.Errorf("%+v", color)
 			}
 		}
 	}