public class Leap_year_spec {
public static class A_year_is_a_leap_year {
@Test public void if_it_is_divisible_by_4_but_not_by_100()...
@Test public void if_it_is_divisible_by_400()...
public static class A_year_is_not_a_leap_year {
@Test public void if_it_is_not_divisible_by_4()...
@Test public void if_it_is_divisible_by_100_but_not_by_400()...