@Test(expectedExceptions = CalendricalException.class)
public void testMinusYearsInvalidTooSmall() {
testDate.minusYears(20000);
}
// -----------------------------------------------------------------------
// minusYears()
// -----------------------------------------------------------------------
@Test
public void testMinusYears() {
assertEquals(
testDate.minusYears(10), MinguoDate.of(testYear - 10, testMonthOfYear, testDayOfMonth));
}