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test_weak_function_proxy.py
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test_weak_function_proxy.py
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from __future__ import print_function
import unittest
import gc
import wrapt
class TestWeakFunctionProxy(unittest.TestCase):
def test_isinstance(self):
def function(a, b):
return a, b
proxy = wrapt.WeakFunctionProxy(function)
self.assertTrue(isinstance(proxy, type(function)))
def test_no_callback(self):
def function(a, b):
return a, b
proxy = wrapt.WeakFunctionProxy(function)
self.assertEqual(proxy(1, 2), (1, 2))
function = None
gc.collect()
def test_call_expired(self):
def function(a, b):
return a, b
proxy = wrapt.WeakFunctionProxy(function)
self.assertEqual(proxy(1, 2), (1, 2))
function = None
gc.collect()
def run(*args):
proxy()
self.assertRaises(ReferenceError, run, ())
def test_function(self):
def function(a, b):
return a, b
result = []
def callback(proxy):
result.append(id(proxy))
proxy = wrapt.WeakFunctionProxy(function, callback)
self.assertEqual(proxy(1, 2), (1, 2))
function = None
gc.collect()
self.assertEqual(len(result), 1)
self.assertEqual(id(proxy), result[0])
def test_instancemethod_delete_instance(self):
class Class(object):
def function(self, a, b):
return a, b
result = []
def callback(proxy):
result.append(id(proxy))
c = Class()
proxy = wrapt.WeakFunctionProxy(c.function, callback)
self.assertEqual(proxy(1, 2), (1, 2))
c = None
gc.collect()
self.assertEqual(len(result), 1)
self.assertEqual(id(proxy), result[0])
def test_instancemethod_delete_function(self):
class Class(object):
def function(self, a, b):
return a, b
result = []
def callback(proxy):
result.append(id(proxy))
c = Class()
proxy = wrapt.WeakFunctionProxy(c.function, callback)
self.assertEqual(proxy(1, 2), (1, 2))
del c
del Class.function
gc.collect()
self.assertEqual(len(result), 1)
self.assertEqual(id(proxy), result[0])
def test_instancemethod_delete_function_and_instance(self):
class Class(object):
def function(self, a, b):
return a, b
result = []
def callback(proxy):
result.append(id(proxy))
c = Class()
proxy = wrapt.WeakFunctionProxy(c.function, callback)
self.assertEqual(proxy(1, 2), (1, 2))
c = None
del Class.function
gc.collect()
self.assertEqual(len(result), 1)
self.assertEqual(id(proxy), result[0])
def test_classmethod(self):
class Class(object):
@classmethod
def function(cls, a, b):
self.assertEqual(cls, Class)
return a, b
result = []
def callback(proxy):
result.append(id(proxy))
proxy = wrapt.WeakFunctionProxy(Class.function, callback)
self.assertEqual(proxy(1, 2), (1, 2))
Class = None
gc.collect()
self.assertEqual(len(result), 1)
self.assertEqual(id(proxy), result[0])
def test_staticmethod(self):
class Class(object):
@staticmethod
def function(a, b):
return a, b
result = []
def callback(proxy):
result.append(id(proxy))
proxy = wrapt.WeakFunctionProxy(Class.function, callback)
self.assertEqual(proxy(1, 2), (1, 2))
Class = None
gc.collect()
self.assertEqual(len(result), 1)
self.assertEqual(id(proxy), result[0])
if __name__ == '__main__':
unittest.main()