public void test_toInstant_UTC(LocalDateTime ldt, long expectedEpSec, int expectedNos) {

    ZonedDateTime dt = ldt.atZone(ZoneOffset.UTC);
    Instant test = dt.toInstant();
    assertEquals(test.getEpochSecond(), expectedEpSec);
    assertEquals(test.getNano(), expectedNos);
  }

  @Test(groups = { "tck" }