@Test
    public void getConverter_nullInput_throw() throws TikaException {
        assertThrows(IllegalArgumentException.class, () -> {
            TikaToXMP.getConverter(null);
        });
    }
Tests the Tika <code>Metadata</code> to XMP conversion functionatlity
tika-xmp/src/test/java/org/apache/tika/xmp/TikaToXMPTest.java