public void test_minus_Period() {

    MockSimplePeriod period = MockSimplePeriod.of(7, ChronoUnit.MONTHS);
    OffsetDateTime t = this.TEST_2008_6_30_11_30_59_000000500.minus(period);
    assertEquals(t, OffsetDateTime.of(2007, 11, 30, 11, 30, 59, 500, OFFSET_PONE));
  }

  // -----------------------------------------------------------------------
  // minus(Duration)
  // -----------------------------------------------------------------------
  @Test(groups = { "tck" }