public void testAtMajorMinor() {
    assertTrue(_10_4.atMajorMinor(10, 4));

    assertFalse(_10_2.atMajorMinor(10, 1));
    assertFalse(_10_2.atMajorMinor(10, 3));
    assertFalse(_10_2.atMajorMinor(11, 2));
  }