Add test for infinite loop when copying outlines

DEVSIX-5076

Autoported commit.
Original commit hash: [26287f1c8]

Author: Kate Ivanova

itext.tests/itext.kernel.tests/itext/kernel/utils/PdfMergerTest.cs

@@ -334,6 +334,21 @@ public virtual void MergePdfWithComplexOCGTwiceTest() {
             NUnit.Framework.Assert.IsNull(new CompareTool().CompareByContent(outPdf, cmpPdf, destinationFolder));
         }
 
+        [NUnit.Framework.Test]
+        [NUnit.Framework.Ignore("TODO: DEVSIX-5064 (when doing merge with outlines infinite loop occurs )")]
+        public virtual void MergeOutlinesWithWrongStructureTest() {
+            PdfDocument inputDoc = new PdfDocument(new PdfReader(sourceFolder + "infiniteLoopInOutlineStructure.pdf"));
+            PdfDocument outputDoc = new PdfDocument(new PdfWriter(destinationFolder + "infiniteLoopInOutlineStructure.pdf"
+                ));
+            PdfMerger merger = new PdfMerger(outputDoc, false, true);
+            System.Console.Out.WriteLine("Doing merge");
+            merger.Merge(inputDoc, 1, 2);
+            merger.Close();
+            System.Console.Out.WriteLine("Merge done");
+            NUnit.Framework.Assert.IsNull(new CompareTool().CompareByContent(destinationFolder + "infiniteLoopInOutlineStructure.pdf"
+                , sourceFolder + "cmp_infiniteLoopInOutlineStructure.pdf", destinationFolder));
+        }
+
         private void MergePdfs(IList<FileInfo> sources, String destination) {
             PdfDocument mergedDoc = new PdfDocument(new PdfWriter(destination));
             PdfMerger merger = new PdfMerger(mergedDoc);

itext.tests/itext.kernel.tests/resources/itext/kernel/utils/PdfMergerTest/infiniteLoopInOutlineStructure.pdf

@@ -1 +1 @@
-98c021cbba22ad23416a51c2e8308f9de1b8dacc
+26287f1c8c48faa80481abe03618098f489888c8