    @Test
    public void guessRDFSyntax() throws Exception {

        assertEquals(RDFSyntax.NTRIPLES, AbstractRDFParser.guessRDFSyntax(testNt).get());
        assertEquals(RDFSyntax.TURTLE, AbstractRDFParser.guessRDFSyntax(testTtl).get());
        assertFalse(AbstractRDFParser.guessRDFSyntax(testXml).isPresent());
    }