def test_is_complete(self):
arg1 = MagicMock()
arg1.is_acceptable.return_value = True
arg2 = MagicMock()
arg2.is_acceptable.return_value = True
arg3 = MagicMock()
arg3.is_acceptable.return_value = True
arg4 = MagicMock()
arg4.is_acceptable.return_value = False
extension = Extension(arg1, arg2, arg3)
self.assertTrue(extension.is_complete([arg1, arg2, arg3, arg4], []))
arg4.is_acceptable.return_value = True
self.assertFalse(extension.is_complete([arg1, arg2, arg3, arg4], []))
