def test_equals_3(self): self.assertEqual(build_string('Chocolate'), 'I like Chocolate!')
def test_equals(self): self.assertEqual(build_string('Cheese', 'Milk', 'Chocolate'), 'I like Cheese, Milk, Chocolate!')
def test_equals_2(self): self.assertEqual(build_string('Cheese', 'Milk'), 'I like Cheese, Milk!')