def test_to_dictionary(self):
"""Test conversion to dictionary"""
r = Rectangle(1, 1, 1, 1, 1)
d = {'id': 1, 'width': 1, 'height': 1, 'x': 1, 'y': 1}
self.assertEqual(r.to_dictionary(), d)
r.my_fun_new_attr = 42
self.assertEqual(r.to_dictionary(), d)
