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())
def __init__(self, text):
self.text = text
self.redir = WidgetRedirector(text)
self.top = self.bottom = Delegator(text)
self.bottom.insert = self.redir.register('insert', self.insert)
self.bottom.delete = self.redir.register('delete', self.delete)
self.filters = []
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)
def __init__(self, text):
# XXX would be nice to inherit from Delegator
self.text = text
self.redir = WidgetRedirector(text)
self.top = self.bottom = Delegator(text)
self.bottom.insert = self.redir.register("insert", self.insert)
self.bottom.delete = self.redir.register("delete", self.delete)
self.filters = []
def test_mydel(self):
mydel = Delegator(int)
self.assertIs(mydel.delegate, int)
self.assertEqual(mydel._Delegator__cache, set())
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'})
mydel.numerator
self.assertEqual(mydel._Delegator__cache, {'bit_length', 'numerator'})
del mydel.numerator
self.assertNotIn('numerator', mydel.__dict__)
self.assertIn('numerator', mydel._Delegator__cache)
mydel.setdelegate(float)
self.assertIs(mydel.delegate, float)
self.assertNotIn('bit_length', mydel.__dict__)
self.assertEqual(mydel._Delegator__cache, set())
