Add tests for grayscale alpha png without embedded profile

DEVSIX-3810

Autoported commit.
Original commit hash: [e2d13814a]

Author: EvgenyB1001

itext.tests/itext.io.tests/itext/io/image/PngTest.cs

@@ -65,6 +65,21 @@ public virtual void Graya8BpcDepthImageTest() {
             NUnit.Framework.Assert.AreEqual(8, img.GetImageMask().GetBpc());
         }
 
+        [NUnit.Framework.Test]
+        public virtual void Graya8BpcDepthWithoutEmbeddedProfileImageTest() {
+            ImageData img = ImageDataFactory.Create(sourceFolder + "graya8BpcWithoutProfile.png");
+            NUnit.Framework.Assert.AreEqual(ImageType.PNG, img.GetOriginalType());
+            NUnit.Framework.Assert.AreEqual(100, img.GetWidth(), 0);
+            NUnit.Framework.Assert.AreEqual(100, img.GetHeight(), 0);
+            NUnit.Framework.Assert.AreEqual(8, img.GetBpc());
+            NUnit.Framework.Assert.AreEqual(1, img.GetColorSpace());
+            NUnit.Framework.Assert.AreEqual(4, ((PngImageData)img).GetColorType());
+            NUnit.Framework.Assert.IsNotNull(img.GetImageMask());
+            NUnit.Framework.Assert.AreEqual(1, img.GetImageMask().GetColorSpace());
+            NUnit.Framework.Assert.AreEqual(8, img.GetImageMask().GetBpc());
+            NUnit.Framework.Assert.IsNull(img.GetProfile());
+        }
+
         [NUnit.Framework.Test]
         public virtual void Graya8BpcAddColorToAlphaImageTest() {
             ImageData img = ImageDataFactory.Create(sourceFolder + "graya8BpcAddColorToAlpha.png");

itext.tests/itext.io.tests/resources/itext/io/image/PngTest/graya8BpcWithoutProfile.png

@@ -99,6 +99,14 @@ public virtual void GrayAlphaPngImageXObjectTest() {
                 "graya8Bpc.png");
         }
 
+        [NUnit.Framework.Test]
+        public virtual void GrayAlphaPngWithoutEmbeddedProfileImageXObjectTest() {
+            // TODO DEVSIX-1313
+            // Update cmp file after the specified ticket will be resolved
+            ConvertAndCompare(destinationFolder + "graya8BpcWithoutProfile.pdf", sourceFolder + "cmp_graya8BpcWithoutProfile.pdf"
+                , sourceFolder + "graya8BpcWithoutProfile.png");
+        }
+
         [NUnit.Framework.Test]
         public virtual void GraySimpleTransparencyPngImageXObjectTest() {
             ConvertAndCompare(destinationFolder + "grayscaleSimpleTransparencyImage.pdf", sourceFolder + "cmp_grayscaleSimpleTransparencyImage.pdf"

itext.tests/itext.kernel.tests/itext/kernel/pdf/xobject/PdfImageXObjectTest.cs

@@ -1 +1 @@
-9a233f1e4fde03c882c7b29a81f9524137a3a8b2
+e2d13814ae06493ffa297b910060b2401eb259aa