def test_should_rescue_captive(self):
captive = Captive()
captive.position = mock.Mock()
mock_space = mock.Mock()
mock_space.is_captive.return_value = True
self.rescue.space = mock.Mock(return_value=mock_space)
self.rescue.unit = mock.Mock(return_value=captive)
self.warrior.earn_points = mock.Mock()
self.rescue.perform()
self.assertEqual(None, captive.position)
self.warrior.earn_points.assert_called_once_with(20)
