@Test
    public void testSignatureInAcroForm() throws Exception {
        //The current test doc does not contain any content in the signature area.
        //This just tests that a RuntimeException is not thrown.
        //TODO: find a better test file for this issue.
        XMLResult result = getXML("testPDF_acroform3.pdf");
        Metadata m = result.metadata;
        assertEquals("true", m.get(PDF.HAS_XMP));
        assertEquals("true", m.get(PDF.HAS_ACROFORM_FIELDS));
        assertEquals("false", m.get(PDF.HAS_XFA));
        assertContains("<li>aTextField: TIKA-1226</li>", result.xml);
    }
Test to ensure that Links are extracted from the text
<p/>
Note - the PDF contains the text "This is a hyperlink" which
a hyperlink annotation, linking to the tika site, on it. This
test will need updating when we're able to apply the annotation
to the text itself, rather than following on afterwards as now
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-pdf-module/src/test/java/org/apache/tika/parser/pdf/PDFParserTest.java