From 4c5f019db33cd99d9c7be9587e2049be0ddf903c Mon Sep 17 00:00:00 2001
From: Hajime Hoshi <hajimehoshi@gmail.com>
Date: Wed, 2 Nov 2022 12:35:19 +0900
Subject: [PATCH] ebiten: add TestImageSetAndSubImage

Updates #2428
---
 image_test.go | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/image_test.go b/image_test.go
index 5299cca9c..bb617b461 100644
--- a/image_test.go
+++ b/image_test.go
@@ -3966,3 +3966,15 @@ func TestImageColorMScale(t *testing.T) {
 		t.Errorf("got: %v, want: %v", got, want)
 	}
 }
+
+// Issue #2428
+func TestImageSetAndSubImage(t *testing.T) {
+	const w, h = 16, 16
+	img := ebiten.NewImage(w, h)
+	img.Set(1, 1, color.RGBA{0xff, 0, 0, 0xff})
+	got := img.SubImage(image.Rect(0, 0, w, h)).At(1, 1).(color.RGBA)
+	want := color.RGBA{0xff, 0, 0, 0xff}
+	if got != want {
+		t.Errorf("got: %v, want: %v", got, want)
+	}
+}