public virtual void IndirectFilterMarkedToBeFlushedBeforeStreamTest() { // TODO DEVSIX-1193 remove junitExpectedException after fix String inFile = sourceFolder + "indFilterInCatalog.pdf"; String @out = destinationFolder + "indirectFilterMarkedToBeFlushedBeforeStreamTest.pdf"; PdfWriter writer = new PdfWriter(@out); PdfDocument pdfDoc = new PdfDocument(new PdfReader(inFile), writer); // Simulate the case when indirect filter object is marked to be flushed before the stream itself. PdfObject filterObject = pdfDoc.GetPdfObject(6); filterObject.GetIndirectReference().SetState(PdfObject.MUST_BE_FLUSHED); // The image stream will be marked as MUST_BE_FLUSHED after page is flushed. pdfDoc.GetFirstPage().GetPdfObject().GetIndirectReference().SetState(PdfObject.MUST_BE_FLUSHED); NUnit.Framework.Assert.That(() => { writer.FlushWaitingObjects(JavaCollectionsUtil.EmptySet <PdfIndirectReference>()); pdfDoc.Close(); } , NUnit.Framework.Throws.InstanceOf <NullReferenceException>()) ; }