public void test_toString(int y, int o, int d, int h, int m, int s, int n, String zoneId, String expected) {

    ZonedDateTime t = ZonedDateTime.of(dateTime(y, o, d, h, m, s, n), ZoneId.of(zoneId));
    String str = t.toString();
    assertEquals(str, expected);
  }

  // -----------------------------------------------------------------------
  // toString(DateTimeFormatter)
  // -----------------------------------------------------------------------
  @Test(groups = { "tck" }