Compare producer line on document info comparison

Note that pdfXFA and iTextSharp producer line is treated the same way
as regular iText one.

DEVSIX-1870

Author: IdamkinI

kernel/src/main/java/com/itextpdf/kernel/utils/CompareTool.java

@@ -131,6 +131,10 @@ public class CompareTool {
     private static final String gsParams = " -dNOPAUSE -dBATCH -sDEVICE=png16m -r150 -sOutputFile='<outputfile>' '<inputfile>'";
     private static final String compareParams = " '<image1>' '<image2>' '<difference>'";
 
+    private static final String versionRegexp = "(iText\u00ae( pdfX(FA|fa))?|iTextSharp\u2122) (\\d\\.)+\\d(-SNAPSHOT)?";
+    private static final String versionReplacement = "iText\u00ae <version>";
+    private static final String copyrightRegexp = "\u00a9\\d+-\\d+ iText Group NV";
+    private static final String copyrightReplacement = "\u00a9<copyright years> iText Group NV";
 
     private String gsExec;
     private String compareExec;
@@ -650,7 +654,7 @@ public String compareDocumentInfo(String outPdf, String cmpPdf, byte[] outPass,
         String[] outInfo = convertInfo(outDocument.getDocumentInfo());
         for (int i = 0; i < cmpInfo.length; ++i) {
             if (!cmpInfo[i].equals(outInfo[i])){
-                message = "Document info fail";
+                message = MessageFormatUtil.format("Document info fail. Expected: \"{0}\", actual: \"{1}\"", cmpInfo[i], outInfo[i]);
                 break;
             }
         }
@@ -1614,7 +1618,7 @@ private int getExplicitDestinationPageNum(PdfArray explicitDest) {
     }
 
     private String[] convertInfo(PdfDocumentInfo info) {
-        String[] convertedInfo = new String[]{"", "", "", ""};
+        String[] convertedInfo = new String[]{"", "", "", "", ""};
         String infoValue = info.getTitle();
         if (infoValue != null)
             convertedInfo[0] = infoValue;
@@ -1627,9 +1631,16 @@ private String[] convertInfo(PdfDocumentInfo info) {
         infoValue = info.getKeywords();
         if (infoValue != null)
             convertedInfo[3] = infoValue;
+        infoValue = info.getProducer();
+        if (infoValue != null) {
+            convertedInfo[4] = convertProducerLine(infoValue);
+        }
         return convertedInfo;
     }
 
+    private String convertProducerLine(String producer) {
+        return producer.replaceAll(versionRegexp, versionReplacement).replaceAll(copyrightRegexp, copyrightReplacement);
+    }
 
     private class PngFileFilter implements FileFilter {
 

kernel/src/test/java/com/itextpdf/kernel/utils/CompareToolTest.java

@@ -122,4 +122,12 @@ public void compareToolErrorReportTest04() throws InterruptedException, IOExcept
         Assert.assertTrue("CompareTool report differs from the reference one", compareTool.compareXmls(sourceFolder + "cmp_report01.xml", destinationFolder + "simple_pdf.report.xml"));
 
     }
+
+    @Test
+    public void differentProducerTest() throws IOException {
+        String expectedMessage = "Document info fail. Expected: \"iText\u00ae <version> \u00a9<copyright years> iText Group NV (iText Software; licensed version)\", actual: \"iText\u00ae <version> \u00a9<copyright years> iText Group NV (AGPL-version)\"";
+        String licensed = sourceFolder + "producerLicensed.pdf";
+        String agpl = sourceFolder + "producerAGPL.pdf";
+        Assert.assertEquals(expectedMessage, new CompareTool().compareDocumentInfo(agpl, licensed));
+    }
 }