@Test
    public void testDetectEPub() throws Exception {
        assertTypeByData("testEPUB.epub", "application/epub+zip");
        assertTypeByData("testiBooks.ibooks", "application/x-ibooks+zip");
    }
EPub uses a similar mimetype entry to OpenDocument for storing
the mimetype within the parent zip file
tika-parsers/tika-parsers-standard/tika-parsers-standard-package/src/test/java/org/apache/tika/detect/TestContainerAwareDetector.java