public void test_plus_Period_invalidTooSmall() {

    MockSimplePeriod period = MockSimplePeriod.of(-1, ChronoUnit.YEARS);
    LocalDateTime.of(Year.MIN_YEAR, 1, 1, 0, 0).plus(period);
  }

  // -----------------------------------------------------------------------
  // plus(long,PeriodUnit)
  // -----------------------------------------------------------------------
  @Test(groups = { "tck" }