@Test(dataProvider = "sampleDateTimes", groups = { "tck" })
  public void test_equals_true(int y, int m, int d, int h, int mi, int s, int n) {

    LocalDateTime a = LocalDateTime.of(y, m, d, h, mi, s, n);
    LocalDateTime b = LocalDateTime.of(y, m, d, h, mi, s, n);
    assertTrue(a.equals(b));
  }

  @Test(dataProvider = "sampleDateTimes", groups = { "tck" }