@Test
    public void testComment() throws Exception {
        final String[] extensions =
                new String[]{"ppt", "pptx", "doc", "docx", "xls", "xlsx", "pdf", "rtf"};
        for (String extension : extensions) {
            verifyComment(extension, "testComment");
        }
    }
Junit test class for Tika {@link Parser}s.
tika-parsers/tika-parsers-standard/tika-parsers-standard-package/src/test/java/org/apache/tika/parser/TestParsers.java