@Test
    public void testMP4ParsingAudio() throws Exception {
        Metadata metadata = new Metadata();
        String content = getText("testMP4.m4a", metadata);

        // Check core properties
        assertEquals("audio/mp4", metadata.get(Metadata.CONTENT_TYPE));
        assertEquals("Test Title", metadata.get(TikaCoreProperties.TITLE));
        assertEquals("Test Artist", metadata.get(TikaCoreProperties.CREATOR));
        assertEquals("2012-01-28T18:39:18Z", metadata.get(TikaCoreProperties.CREATED));
        assertEquals("2012-01-28T18:40:25Z", metadata.get(TikaCoreProperties.MODIFIED));

        // Check the textual contents
        assertContains("Test Title", content);
        assertContains("Test Artist", content);
        assertContains("Test Album", content);
        assertContains("2008", content);
        assertContains("Test Comment", content);
        assertContains("Test Genre", content);

        // Check XMPDM-typed audio properties
        assertEquals("Test Album", metadata.get(XMPDM.ALBUM));
        assertEquals("Test Artist", metadata.get(XMPDM.ARTIST));
        assertEquals("Test Composer", metadata.get(XMPDM.COMPOSER));
        assertEquals("2008", metadata.get(XMPDM.RELEASE_DATE));
        assertEquals("Test Genre", metadata.get(XMPDM.GENRE));
        assertEquals("Test Comments", metadata.get(XMPDM.LOG_COMMENT.getName()));
        assertEquals("1", metadata.get(XMPDM.TRACK_NUMBER));
        assertEquals("Test Album Artist", metadata.get(XMPDM.ALBUM_ARTIST));
        assertEquals("6", metadata.get(XMPDM.DISC_NUMBER));
        assertEquals("0", metadata.get(XMPDM.COMPILATION));


        assertEquals("44100", metadata.get(XMPDM.AUDIO_SAMPLE_RATE));
        assertEquals("Stereo", metadata.get(XMPDM.AUDIO_CHANNEL_TYPE));
        assertEquals("M4A", metadata.get(XMPDM.AUDIO_COMPRESSOR));
        assertEquals("0.07", metadata.get(XMPDM.DURATION));

        assertEquals("iTunes 10.5.3.3", metadata.get(XMP.CREATOR_TOOL));

        assertContains("org.apache.tika.parser.mp4.MP4Parser",
                Arrays.asList(metadata.getValues(TikaCoreProperties.TIKA_PARSED_BY)));

        // Check again by file, rather than stream
        TikaInputStream tstream =
                TikaInputStream.get(getResourceAsStream("/test-documents/testMP4.m4a"));
        tstream.getFile();
        ContentHandler handler = new BodyContentHandler();
        try {
            AUTO_DETECT_PARSER.parse(tstream, handler, metadata, new ParseContext());
        } finally {
            tstream.close();
        }
        //TODO: why don't we check the output here?
    }
Test that we can extract information from
a M4A MP4 Audio file
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-audiovideo-module/src/test/java/org/apache/tika/parser/mp4/MP4ParserTest.java