(self)
| 7 | class DelegatorTest(unittest.TestCase): |
| 8 | |
| 9 | def test_mydel(self): |
| 10 | # Test a simple use scenario. |
| 11 | |
| 12 | # Initialize an int delegator. |
| 13 | mydel = Delegator(int) |
| 14 | self.assertIs(mydel.delegate, int) |
| 15 | self.assertEqual(mydel._Delegator__cache, set()) |
| 16 | # Trying to access a non-attribute of int fails. |
| 17 | self.assertRaises(AttributeError, mydel.__getattr__, 'xyz') |
| 18 | |
| 19 | # Add real int attribute 'bit_length' by accessing it. |
| 20 | bl = mydel.bit_length |
| 21 | self.assertIs(bl, int.bit_length) |
| 22 | self.assertIs(mydel.__dict__['bit_length'], int.bit_length) |
| 23 | self.assertEqual(mydel._Delegator__cache, {'bit_length'}) |
| 24 | |
| 25 | # Add attribute 'numerator'. |
| 26 | mydel.numerator |
| 27 | self.assertEqual(mydel._Delegator__cache, {'bit_length', 'numerator'}) |
| 28 | |
| 29 | # Delete 'numerator'. |
| 30 | del mydel.numerator |
| 31 | self.assertNotIn('numerator', mydel.__dict__) |
| 32 | # The current implementation leaves it in the name cache. |
| 33 | # self.assertIn('numerator', mydel._Delegator__cache) |
| 34 | # However, this is not required and not part of the specification |
| 35 | |
| 36 | # Change delegate to float, first resetting the attributes. |
| 37 | mydel.setdelegate(float) # calls resetcache |
| 38 | self.assertNotIn('bit_length', mydel.__dict__) |
| 39 | self.assertEqual(mydel._Delegator__cache, set()) |
| 40 | self.assertIs(mydel.delegate, float) |
| 41 | |
| 42 | |
| 43 | if __name__ == '__main__': |
nothing calls this directly
no test coverage detected