def test_ano_bissexto(self):
     self.assertEqual(is_bissexto(4),   True)
     self.assertEqual(is_bissexto(8),   True)
     self.assertEqual(is_bissexto(1732),True)
     self.assertEqual(is_bissexto(400), True)
     self.assertEqual(is_bissexto(1200),True)
     self.assertEqual(is_bissexto(1944),True)
     self.assertEqual(is_bissexto(2008),True)
     self.assertEqual(is_bissexto(1888),True)
     self.assertEqual(is_bissexto(1600),True)
 def test_ano_nao_bissexto(self): 
     self.assertEqual(is_bissexto(1),   False)
     self.assertEqual(is_bissexto(5),   False)
     self.assertEqual(is_bissexto(100), False)
     self.assertEqual(is_bissexto(1000),False)
     self.assertEqual(is_bissexto(1889),False)