@Override
    public Set<String> getEntityTypes() {
        return entityTypes;
    }
@Test
    public void testGetEntityTypes() throws Exception {

        String text = "Hey, Lets meet on this Sunday or MONDAY because i am busy on Saturday";
        System.setProperty(NamedEntityParser.SYS_PROP_NER_IMPL, RegexNERecogniser.class.getName());

        Tika tika = new Tika(
                new TikaConfig(NamedEntityParser.class.getResourceAsStream("tika-config.xml")));
        Metadata md = new Metadata();
        tika.parse(new ByteArrayInputStream(text.getBytes(StandardCharsets.UTF_8)), md);

        Set<String> days = new HashSet<>(Arrays.asList(md.getValues("NER_WEEK_DAY")));
        assertTrue(days.contains("Sunday"));
        assertTrue(days.contains("MONDAY"));
        assertTrue(days.contains("Saturday"));
        assertTrue(days.size() == 3); //and nothing else


    }