| 1 | n/a | import unittest |
|---|
| 2 | n/a | from idlelib.delegator import Delegator |
|---|
| 3 | n/a | |
|---|
| 4 | n/a | class DelegatorTest(unittest.TestCase): |
|---|
| 5 | n/a | |
|---|
| 6 | n/a | def test_mydel(self): |
|---|
| 7 | n/a | # Test a simple use scenario. |
|---|
| 8 | n/a | |
|---|
| 9 | n/a | # Initialize an int delegator. |
|---|
| 10 | n/a | mydel = Delegator(int) |
|---|
| 11 | n/a | self.assertIs(mydel.delegate, int) |
|---|
| 12 | n/a | self.assertEqual(mydel._Delegator__cache, set()) |
|---|
| 13 | n/a | # Trying to access a non-attribute of int fails. |
|---|
| 14 | n/a | self.assertRaises(AttributeError, mydel.__getattr__, 'xyz') |
|---|
| 15 | n/a | |
|---|
| 16 | n/a | # Add real int attribute 'bit_length' by accessing it. |
|---|
| 17 | n/a | bl = mydel.bit_length |
|---|
| 18 | n/a | self.assertIs(bl, int.bit_length) |
|---|
| 19 | n/a | self.assertIs(mydel.__dict__['bit_length'], int.bit_length) |
|---|
| 20 | n/a | self.assertEqual(mydel._Delegator__cache, {'bit_length'}) |
|---|
| 21 | n/a | |
|---|
| 22 | n/a | # Add attribute 'numerator'. |
|---|
| 23 | n/a | mydel.numerator |
|---|
| 24 | n/a | self.assertEqual(mydel._Delegator__cache, {'bit_length', 'numerator'}) |
|---|
| 25 | n/a | |
|---|
| 26 | n/a | # Delete 'numerator'. |
|---|
| 27 | n/a | del mydel.numerator |
|---|
| 28 | n/a | self.assertNotIn('numerator', mydel.__dict__) |
|---|
| 29 | n/a | # The current implementation leaves it in the name cache. |
|---|
| 30 | n/a | # self.assertIn('numerator', mydel._Delegator__cache) |
|---|
| 31 | n/a | # However, this is not required and not part of the specification |
|---|
| 32 | n/a | |
|---|
| 33 | n/a | # Change delegate to float, first resetting the attributes. |
|---|
| 34 | n/a | mydel.setdelegate(float) # calls resetcache |
|---|
| 35 | n/a | self.assertNotIn('bit_length', mydel.__dict__) |
|---|
| 36 | n/a | self.assertEqual(mydel._Delegator__cache, set()) |
|---|
| 37 | n/a | self.assertIs(mydel.delegate, float) |
|---|
| 38 | n/a | |
|---|
| 39 | n/a | if __name__ == '__main__': |
|---|
| 40 | n/a | unittest.main(verbosity=2, exit=2) |
|---|
