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import unittest
from PySide.QtCore import QObject, SIGNAL
# Description of the problem
# After creating an PyObject that inherits from QObject, connecting it,
# deleting it and later creating another Python QObject-based object, this
# new object will point to the same memory position as the first one.
# Somehow the underlying QObject also points to the same position.
# In PyQt4, the connection works fine with the same memory behavior,
# so it looks like specific to SIP.
class Dummy(QObject):
def __init__(self, parent=None):
QObject.__init__(self, parent)
class Joe(QObject):
def __init__(self, parent=None):
QObject.__init__(self, parent)
class SegfaultCase(unittest.TestCase):
"""Test case for the segfault happening when parent() is called inside
ProxyObject"""
def setUp(self):
self.called = False
def tearDown(self):
try:
del self.args
except:
pass
def callback(self, *args):
if tuple(self.args) == args:
self.called = True
def testSegfault(self):
"""Regression: Segfault for qobjects in the same memory position."""
obj = Dummy()
QObject.connect(obj, SIGNAL('bar(int)'), self.callback)
self.args = (33,)
obj.emit(SIGNAL('bar(int)'), self.args[0])
self.assert_(self.called)
del obj
obj = Joe()
QObject.connect(obj, SIGNAL('bar(int)'), self.callback)
self.args = (33,)
obj.emit(SIGNAL('bar(int)'), self.args[0])
self.assert_(self.called)
def testSameReference(self):
"""Example of how sip(?) reuses memory positions"""
obj = Dummy()
s1 = str(obj)
del obj
obj = Dummy()
s2 = str(obj)
self.assertEqual(s1, s2)
obj2 = Dummy()
s3 = str(obj2)
self.assertNotEqual(s2, s3)
if __name__ == '__main__':
unittest.main()
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