Add unit-test for #1508

brut.apktool/apktool-lib/src/test/java/brut/androlib/BuildAndDecodeTest.java

@@ -350,6 +350,27 @@ public class BuildAndDecodeTest {
         assertEquals(controlImage.getRGB(30, 30), testImage.getRGB(30, 30));
     }
 
+    @Test
+    public void issue1508Test() throws BrutException, IOException {
+        char slash = File.separatorChar;
+        String location = slash + "res" + slash + "drawable-xhdpi" + slash;
+
+        File control = new File((sTestOrigDir + location), "btn_zoom_up_normal.9.png");
+        File test = new File((sTestNewDir + location), "btn_zoom_up_normal.9.png");
+
+        BufferedImage controlImage = ImageIO.read(control);
+        BufferedImage testImage = ImageIO.read(test);
+
+        // 0, 0 = clear
+        assertEquals(controlImage.getRGB(0, 0), testImage.getRGB(0, 0));
+
+        // 30, 0 = black line
+        assertEquals(controlImage.getRGB(0, 30), testImage.getRGB(0, 30));
+
+        // 30, 30 = greyish button
+        assertEquals(controlImage.getRGB(30, 30), testImage.getRGB(30, 30));
+    }
+
     @Test
     public void drawableXxhdpiTest() throws BrutException, IOException {
         compareResFolder("drawable-xxhdpi");