Add PdfAIndirectResourcesTest class

DEVSIX-3735

Author: EvgenyB1001

pdfa/src/test/java/com/itextpdf/pdfa/PdfA2LayoutOcgTest.java

@@ -56,6 +56,7 @@ This file is part of the iText (R) project.
 import com.itextpdf.layout.element.Image;
 import com.itextpdf.test.ExtendedITextTest;
 import com.itextpdf.test.annotations.type.IntegrationTest;
+import com.itextpdf.test.pdfa.VeraPdfValidator;
 import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Test;
@@ -104,6 +105,7 @@ public void checkIfOcgForPdfA2Works() throws IOException, InterruptedException {
 
         pdfDoc.close();
         Assert.assertNull(new CompareTool().compareByContent(outFileName, cmpFileName, destinationFolder, "diff01_"));
+        Assert.assertNull(new VeraPdfValidator().validate(outFileName));
     }
 
 }

pdfa/src/test/java/com/itextpdf/pdfa/PdfAIndirectResourcesTest.java

@@ -0,0 +1,107 @@
+/*
+    This file is part of the iText (R) project.
+    Copyright (c) 1998-2020 iText Group NV
+    Authors: iText Software.
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License version 3
+    as published by the Free Software Foundation with the addition of the
+    following permission added to Section 15 as permitted in Section 7(a):
+    FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
+    ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
+    OF THIRD PARTY RIGHTS
+
+    This program is distributed in the hope that it will be useful, but
+    WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+    or FITNESS FOR A PARTICULAR PURPOSE.
+    See the GNU Affero General Public License for more details.
+    You should have received a copy of the GNU Affero General Public License
+    along with this program; if not, see http://www.gnu.org/licenses or write to
+    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+    Boston, MA, 02110-1301 USA, or download the license from the following URL:
+    http://itextpdf.com/terms-of-use/
+
+    The interactive user interfaces in modified source and object code versions
+    of this program must display Appropriate Legal Notices, as required under
+    Section 5 of the GNU Affero General Public License.
+
+    In accordance with Section 7(b) of the GNU Affero General Public License,
+    a covered work must retain the producer line in every PDF that is created
+    or manipulated using iText.
+
+    You can be released from the requirements of the license by purchasing
+    a commercial license. Buying such a license is mandatory as soon as you
+    develop commercial activities involving the iText software without
+    disclosing the source code of your own applications.
+    These activities include: offering paid services to customers as an ASP,
+    serving PDFs on the fly in a web application, shipping iText with a closed
+    source product.
+
+    For more information, please contact iText Software Corp. at this
+    address: [email protected]
+ */
+package com.itextpdf.pdfa;
+
+import com.itextpdf.kernel.pdf.PdfIndirectReference;
+import com.itextpdf.kernel.pdf.PdfReader;
+import com.itextpdf.kernel.pdf.PdfWriter;
+import com.itextpdf.kernel.xmp.XMPException;
+import com.itextpdf.test.ExtendedITextTest;
+import com.itextpdf.test.annotations.LogMessage;
+import com.itextpdf.test.annotations.LogMessages;
+import com.itextpdf.test.annotations.type.IntegrationTest;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.experimental.categories.Category;
+
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.util.Set;
+
+@Category(IntegrationTest.class)
+public class PdfAIndirectResourcesTest extends ExtendedITextTest {
+    public static final String sourceFolder = "./src/test/resources/com/itextpdf/pdfa/pdfs/";
+    public static final String destinationFolder = "./target/test/com/itextpdf/pdfa/PdfAIndirectResourcesTest/";
+
+    @Before
+    public void configure() {
+        createDestinationFolder(destinationFolder);
+    }
+
+    @Test
+    @LogMessages(messages = {
+            @LogMessage(messageTemplate = PdfAConformanceLogMessageConstant.CATALOG_SHOULD_CONTAIN_LANG_ENTRY)
+    })
+    public void indirectResources01Test() throws IOException, XMPException, InterruptedException {
+        String fileName = destinationFolder + "indirectResources01Test.pdf";
+        PdfADocument pdfDoc = new PdfADocument(new PdfReader(sourceFolder + "indirectResources01.pdf"), new PdfWriter(fileName));
+        pdfDoc.close();
+    }
+
+    @Test
+    public void indirectResources02Test() throws IOException, XMPException, InterruptedException {
+        String fileName = destinationFolder + "indirectResources02Test.pdf";
+
+        PdfWriter writer = new CustomPdfWriter(fileName, 19);
+        PdfADocument pdfDoc = new PdfADocument(new PdfReader(sourceFolder + "indirectResources02.pdf"), writer);
+        pdfDoc.close();
+    }
+
+    private static class CustomPdfWriter extends PdfWriter {
+        private int objectToFlushNumber;
+
+        public CustomPdfWriter(String filename, int objectToFlushNumber) throws FileNotFoundException {
+            super(filename);
+            this.objectToFlushNumber = objectToFlushNumber;
+        }
+
+        @Override
+        protected void flushWaitingObjects(Set<PdfIndirectReference> forbiddenToFlush) {
+            // Because of flushing order in PdfDocument is uncertain, flushWaitingObjects() method is overridden
+            // to simulate the issue when the certain PdfObject A, that exists in the Catalog entry and in the resources
+            // of another PdfObject B, is flushed before the flushing of the PdfObject B.
+            super.document.getPdfObject(objectToFlushNumber).flush();
+            super.flushWaitingObjects(forbiddenToFlush);
+        }
+    }
+}