Create test for unsupported image type

DEVSIX-7033

Autoported commit.
Original commit hash: [acc7e2d]

Author: guustysebie

itext.tests/itext.cleanup.tests/itext/pdfcleanup/PdfCleanUpToolTest.cs

@@ -949,6 +949,22 @@ public virtual void LineArtsDrawingOnCanvasTest() {
             CompareByContent(cmp, output, OUTPUT_PATH, "diff_lineArtsDrawingOnCanvasTest_");
         }
 
+        [NUnit.Framework.Test]
+        public virtual void CheckUnSupportedImageTypeTest() {
+            String input = INPUT_PATH + "UnsupportedImageType.pdf";
+            String output = OUTPUT_PATH + "UnsupportedImageType.pdf";
+            PdfDocument pdfDocument = new PdfDocument(new PdfReader(input), new PdfWriter(output, new WriterProperties
+                ()));
+            iText.PdfCleanup.PdfCleanUpTool workingTool = new iText.PdfCleanup.PdfCleanUpTool(pdfDocument);
+            int pageIndex = 1;
+            Rectangle area = pdfDocument.GetPage(pageIndex).GetPageSize();
+            workingTool.AddCleanupLocation(new iText.PdfCleanup.PdfCleanUpLocation(pageIndex, area));
+            Exception e = NUnit.Framework.Assert.Catch(typeof(Exception), () => workingTool.CleanUp());
+            NUnit.Framework.Assert.AreEqual(CleanupExceptionMessageConstant.UNSUPPORTED_IMAGE_TYPE.ToLowerInvariant(), 
+                e.Message.ToLowerInvariant());
+            pdfDocument.Close();
+        }
+
         private void CleanUp(String input, String output, IList<iText.PdfCleanup.PdfCleanUpLocation> cleanUpLocations
             ) {
             PdfDocument pdfDocument = new PdfDocument(new PdfReader(input), new PdfWriter(output));

itext.tests/itext.cleanup.tests/resources/itext/pdfcleanup/PdfCleanUpToolTest/UnsupportedImageType.pdf

@@ -33,6 +33,10 @@ public sealed class CleanupExceptionMessageConstant {
         public const String PDF_DOCUMENT_MUST_BE_OPENED_IN_STAMPING_MODE = "PdfDocument must be opened in stamping "
              + "mode.";
 
+        // Do not remove, it's used in .NET
+        // This same exception message is thrown in CleanUpImageUtil#cleanImage when the image format is unsupported
+        public const String UNSUPPORTED_IMAGE_TYPE = "Unsupported image type";
+
         private CleanupExceptionMessageConstant() {
         }
     }

itext/itext.cleanup/itext/pdfcleanup/exceptions/CleanupExceptionMessageConstant.cs

@@ -1 +1 @@
-86e6288fe3f937fb43d89de0e3146c989a4be441
+acc7e2d1edea74b65ea24c0e70353700c7c7ff4c