@Test
    public void testXFDF() throws Exception {
        //for an example: https://docs.appligent.com/fdfmerge/fdfmerge-form-data-format/
        assertTypeDetection("testXFDF.xfdf", "application/vnd.adobe.xfdf");
    }
Files generated by Works 7.0 Spreadsheet application use the OLE2
structure and resemble Excel files (they contain a "Workbook"). They are
not Excel though. They are distinguished from Excel files with an
additional top-level entry in below the root of the POI filesystem.

@throws Exception
tika-parsers/tika-parsers-standard/tika-parsers-standard-package/src/test/java/org/apache/tika/mime/TestMimeTypes.java