def test_is_leap_year_normal(self):
     year = 1976
     self.assertTrue(is_leap_year(year))
 def test_is_leap_year_400(self):
     year = 2000
     self.assertTrue(is_leap_year(year))
 def test_is_leap_year_100(self):
     year = 1900
     self.assertFalse(is_leap_year(year))
 def test_is_leap_year_normal_false(self):
     year = 1998
     self.assertFalse(is_leap_year(year))