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#!/usr/bin/env python
"""Tests covering signal emission and receiving to python slots"""
import unittest
from PySide.QtCore import QObject, SIGNAL
from helper import UsesQCoreApplication
class MyObject(QObject):
def __init__(self, parent=None):
QObject.__init__(self, parent)
self._slotCalledCount = 0
def mySlot(self):
self._slotCalledCount = self._slotCalledCount + 1
class StaticMetaObjectTest(UsesQCoreApplication):
def testSignalPropagation(self):
o = MyObject()
o2 = MyObject()
# SIGNAL foo not created yet
self.assertEqual(o.metaObject().indexOfSignal("foo()"), -1)
o.connect(SIGNAL("foo()"), o2.mySlot)
# SIGNAL foo create after connect
self.assert_(o.metaObject().indexOfSignal("foo()") > 0)
# SIGNAL does not propagate to others objects of the same type
self.assertEqual(o2.metaObject().indexOfSignal("foo()"), -1)
del o
del o2
o = MyObject()
# The SIGNAL was destroyed with old objects
self.assertEqual(o.metaObject().indexOfSignal("foo()"), -1)
def testSharedSignalEmission(self):
o = QObject()
m = MyObject()
o.connect(SIGNAL("foo2()"), m.mySlot)
m.connect(SIGNAL("foo2()"), m.mySlot)
o.emit(SIGNAL("foo2()"))
self.assertEqual(m._slotCalledCount, 1)
del o
m.emit(SIGNAL("foo2()"))
self.assertEqual(m._slotCalledCount, 2)
if __name__ == '__main__':
unittest.main()
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