public void testIsSupported_DurationFieldType() {
    LocalTime test = new LocalTime(10, 20, 30, 40);
    assertEquals(true, test.isSupported(DurationFieldType.hours()));
    assertEquals(true, test.isSupported(DurationFieldType.minutes()));
    assertEquals(true, test.isSupported(DurationFieldType.seconds()));
    assertEquals(true, test.isSupported(DurationFieldType.millis()));
    assertEquals(true, test.isSupported(DurationFieldType.halfdays()));

    assertEquals(false, test.isSupported(DurationFieldType.days()));
    assertEquals(false, test.isSupported((DurationFieldType) null));
  }