def test_sets_with_no_elements_are_empty(self):
     sut = CustomSet()
     self.assertIs(sut.isempty(), True)
 def test_sets_with_no_elements_are_empty(self):
     sut = CustomSet()
     self.assertIs(sut.isempty(), True)
 def test_sets_with_elements_are_not_empty(self):
     sut = CustomSet([1])
     self.assertIs(sut.isempty(), False)
 def test_sets_with_elements_are_not_empty(self):
     sut = CustomSet([1])
     self.assertIs(sut.isempty(), False)