@Test
 public void test_equalsHashCode2() {
   DecimalStyle a = DecimalStyle.STANDARD.withZeroDigit('A');
   DecimalStyle b = DecimalStyle.STANDARD.withZeroDigit('A');
   assertEquals(a.equals(b), true);
   assertEquals(b.equals(a), true);
   assertEquals(a.hashCode(), b.hashCode());
 }
 // -----------------------------------------------------------------------
 @Test
 public void test_equalsHashCode1() {
   DecimalStyle a = DecimalStyle.STANDARD;
   DecimalStyle b = DecimalStyle.STANDARD;
   assertEquals(a.equals(b), true);
   assertEquals(b.equals(a), true);
   assertEquals(a.hashCode(), b.hashCode());
 }