Add tests for grayscale alpha png without embedded profile

DEVSIX-3810

Author: EvgenyB1001

io/src/test/java/com/itextpdf/io/image/PngTest.java

@@ -72,6 +72,21 @@ public void graya8BpcDepthImageTest() throws IOException {
         Assert.assertEquals(8, img.getImageMask().getBpc());
     }
 
+    @Test
+    public void graya8BpcDepthWithoutEmbeddedProfileImageTest() throws IOException {
+        ImageData img = ImageDataFactory.create(sourceFolder + "graya8BpcWithoutProfile.png");
+        Assert.assertEquals(ImageType.PNG, img.getOriginalType());
+        Assert.assertEquals(100, img.getWidth(), 0);
+        Assert.assertEquals(100, img.getHeight(), 0);
+        Assert.assertEquals(8, img.getBpc());
+        Assert.assertEquals(1, img.getColorSpace());
+        Assert.assertEquals(4, ((PngImageData) img).getColorType());
+        Assert.assertNotNull(img.getImageMask());
+        Assert.assertEquals(1, img.getImageMask().getColorSpace());
+        Assert.assertEquals(8, img.getImageMask().getBpc());
+        Assert.assertNull(img.getProfile());
+    }
+
     @Test
     public void graya8BpcAddColorToAlphaImageTest() throws IOException {
         ImageData img = ImageDataFactory.create(sourceFolder + "graya8BpcAddColorToAlpha.png");

io/src/test/resources/com/itextpdf/io/image/PngTest/graya8BpcWithoutProfile.png

@@ -118,6 +118,15 @@ public void grayAlphaPngImageXObjectTest() throws IOException {
                 sourceFolder + "graya8Bpc.png");
     }
 
+    @Test
+    public void grayAlphaPngWithoutEmbeddedProfileImageXObjectTest() throws IOException {
+        // TODO DEVSIX-1313
+        // Update cmp file after the specified ticket will be resolved
+        convertAndCompare(destinationFolder + "graya8BpcWithoutProfile.pdf",
+                sourceFolder + "cmp_graya8BpcWithoutProfile.pdf",
+                sourceFolder + "graya8BpcWithoutProfile.png");
+    }
+
     @Test
     public void graySimpleTransparencyPngImageXObjectTest() throws IOException {
         convertAndCompare(destinationFolder + "grayscaleSimpleTransparencyImage.pdf",