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from __future__ import print_function
import unittest
import inspect
import types
import wrapt
from compat import PY2, PY3, exec_
class TestInheritance(unittest.TestCase):
def test_single_inheritance(self):
@wrapt.decorator
def passthru(wrapped, instance, args, kwargs):
return wrapped(*args, **kwargs)
@passthru
class BaseClass(object):
def __init__(self):
self.value = 1
class DerivedClass(BaseClass):
def __init__(self):
super(DerivedClass, self).__init__()
self.value = 2
base = BaseClass()
self.assertEqual(type(base), BaseClass.__wrapped__)
self.assertTrue(isinstance(base, BaseClass.__wrapped__))
self.assertEqual(base.value, 1)
self.assertEqual(type(base).__mro__, (BaseClass.__wrapped__, object))
self.assertEqual(BaseClass.__mro_entries__(()), (BaseClass.__wrapped__,))
derived = DerivedClass()
self.assertEqual(type(derived), DerivedClass)
self.assertTrue(isinstance(derived, BaseClass.__wrapped__))
self.assertTrue(isinstance(derived, DerivedClass))
self.assertEqual(derived.value, 2)
self.assertEqual(type(derived).__mro__, (DerivedClass, BaseClass.__wrapped__, object))
def test_multiple_inheritance(self):
@wrapt.decorator
def passthru(wrapped, instance, args, kwargs):
return wrapped(*args, **kwargs)
@passthru
class BaseClass1(object):
pass
@passthru
class BaseClass2(object):
pass
class DerivedClass(BaseClass1, BaseClass2):
pass
derived = DerivedClass()
self.assertEqual(type(derived), DerivedClass)
self.assertTrue(isinstance(derived, BaseClass1.__wrapped__))
self.assertTrue(isinstance(derived, BaseClass2.__wrapped__))
self.assertTrue(isinstance(derived, DerivedClass))
self.assertEqual(type(derived).__mro__, (DerivedClass,
BaseClass1.__wrapped__, BaseClass2.__wrapped__, object))
def test_multiple_inheritance_common(self):
@wrapt.decorator
def passthru(wrapped, instance, args, kwargs):
return wrapped(*args, **kwargs)
@passthru
class CommonClass(object):
pass
@passthru
class BaseClass1(CommonClass):
pass
@passthru
class BaseClass2(CommonClass):
pass
class DerivedClass(BaseClass1, BaseClass2):
pass
derived = DerivedClass()
self.assertEqual(type(derived), DerivedClass)
self.assertTrue(isinstance(derived, CommonClass.__wrapped__))
self.assertTrue(isinstance(derived, BaseClass1.__wrapped__))
self.assertTrue(isinstance(derived, BaseClass2.__wrapped__))
self.assertTrue(isinstance(derived, DerivedClass))
self.assertEqual(type(derived).__mro__, (DerivedClass,
BaseClass1.__wrapped__, BaseClass2.__wrapped__,
CommonClass.__wrapped__, object))
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