def test_getting_uncompleted_todos_when_todos_is_not_none(self):
        todo1 = {
            'userId': 1,
            'id': 1,
            'title': 'Make the bed',
            'completed': False
        }
        todo2 = {
            'userId': 1,
            'id': 2,
            'title': 'Walk the dog',
            'completed': True
        }

        # Configure mock to return a response with a JSON-serialized list of todos.
        self.mock_get_todos.return_value = Mock()
        self.mock_get_todos.return_value.json.return_value = [todo1, todo2]

        # Call the service, which will get a list of todos filtered on completed.
        uncompleted_todos = get_uncompleted_todos()

        # Confirm that the mock was called.
        assert_true(self.mock_get_todos.called)

        # Confirm that the expected filtered list of todos was returned.
        assert_list_equal(uncompleted_todos, [todo1])
    def test_getting_uncompleted_todos_when_todos_is_none(self):
        # Configure mock to return None.
        self.mock_get_todos.return_value = None

        # Call the service, which will return an empty list.
        uncompleted_todos = get_uncompleted_todos()

        # Confirm that the mock was called.
        assert_true(self.mock_get_todos.called)

        # Confirm that an empty list was returned.
        assert_list_equal(uncompleted_todos, [])