mirror of
https://github.com/python/cpython.git
synced 2025-10-30 21:21:22 +00:00
37 lines
1.3 KiB
Python
37 lines
1.3 KiB
Python
import unittest
|
|
from idlelib.Delegator import Delegator
|
|
|
|
class DelegatorTest(unittest.TestCase):
|
|
|
|
def test_mydel(self):
|
|
# test a simple use scenario
|
|
|
|
# initialize
|
|
mydel = Delegator(int)
|
|
self.assertIs(mydel.delegate, int)
|
|
self.assertEqual(mydel._Delegator__cache, set())
|
|
|
|
# add an attribute:
|
|
self.assertRaises(AttributeError, mydel.__getattr__, 'xyz')
|
|
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 a second attribute
|
|
mydel.numerator
|
|
self.assertEqual(mydel._Delegator__cache, {'bit_length', 'numerator'})
|
|
|
|
# delete the second (which, however, leaves it in the name cache)
|
|
del mydel.numerator
|
|
self.assertNotIn('numerator', mydel.__dict__)
|
|
self.assertIn('numerator', mydel._Delegator__cache)
|
|
|
|
# reset by calling .setdelegate, which calls .resetcache
|
|
mydel.setdelegate(float)
|
|
self.assertIs(mydel.delegate, float)
|
|
self.assertNotIn('bit_length', mydel.__dict__)
|
|
self.assertEqual(mydel._Delegator__cache, set())
|
|
|
|
if __name__ == '__main__':
|
|
unittest.main(verbosity=2, exit=2)
|