| "Test delegator, coverage 100%." |
| |
| from idlelib.delegator import Delegator |
| import unittest |
| |
| |
| class DelegatorTest(unittest.TestCase): |
| |
| def test_mydel(self): |
| # Test a simple use scenario. |
| |
| # Initialize an int delegator. |
| mydel = Delegator(int) |
| self.assertIs(mydel.delegate, int) |
| self.assertEqual(mydel._Delegator__cache, set()) |
| # Trying to access a non-attribute of int fails. |
| self.assertRaises(AttributeError, mydel.__getattr__, 'xyz') |
| |
| # Add real int attribute 'bit_length' by accessing it. |
| bl = mydel.bit_length |
| self.assertIs(bl, int.bit_length) |
| self.assertIs(mydel.__dict__['bit_length'], int.bit_length) |
| self.assertEqual(mydel._Delegator__cache, {'bit_length'}) |
| |
| # Add attribute 'numerator'. |
| mydel.numerator |
| self.assertEqual(mydel._Delegator__cache, {'bit_length', 'numerator'}) |
| |
| # Delete 'numerator'. |
| del mydel.numerator |
| self.assertNotIn('numerator', mydel.__dict__) |
| # The current implementation leaves it in the name cache. |
| # self.assertIn('numerator', mydel._Delegator__cache) |
| # However, this is not required and not part of the specification |
| |
| # Change delegate to float, first resetting the attributes. |
| mydel.setdelegate(float) # calls resetcache |
| self.assertNotIn('bit_length', mydel.__dict__) |
| self.assertEqual(mydel._Delegator__cache, set()) |
| self.assertIs(mydel.delegate, float) |
| |
| |
| if __name__ == '__main__': |
| unittest.main(verbosity=2, exit=2) |