Python build_string примеры использования

Пример #1

 def test_equals_3(self):
     self.assertEqual(build_string('Chocolate'), 'I like Chocolate!')

Пример #2

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

Пример #3

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