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import unittest
import random
from PySide.QtCore import QObject, SIGNAL
from PySide.QtGui import QPushButton, QSpinBox, QApplication
from helper import BasicPySlotCase, UsesQApplication
def random_gen(count=100, largest=99, lowest=0):
for i in range(count):
yield random.randint(lowest, largest)
class MultipleSignalConnections(UsesQApplication):
qapplication = True
def run_many(self, sender, signal, receivers, args=None):
"""Utility method to connect a list of receivers to a signal.
sender - QObject that will emit the signal
signal - string with the signal signature
receivers - list of BasicPySlotCase instances
args - tuple with the arguments to be sent.
"""
if args is None:
args = tuple()
for rec in receivers:
rec.setUp()
QObject.connect(sender, SIGNAL(signal), rec.cb)
rec.args = tuple(args)
sender.emit(SIGNAL(signal), *args)
for rec in receivers:
self.assert_(rec.called)
def testButtonClick(self):
"""Multiple connections to QPushButton.clicked()"""
sender = QPushButton('button')
receivers = [BasicPySlotCase() for x in range(30)]
self.run_many(sender, 'clicked()', receivers)
def testSpinBoxValueChanged(self):
"""Multiple connections to QSpinBox.valueChanged(int)"""
for test in random_gen(30):
sender = QSpinBox()
#FIXME if number of receivers if higher than 50, segfaults
receivers = [BasicPySlotCase() for x in range(10)]
self.run_many(sender, 'valueChanged(int)', receivers, (test,))
def testPythonSignal(self):
"""Multiple connections to a python signal (short-circuit)"""
class Dummy(QObject):
pass
for test in random_gen(30):
sender = Dummy()
receivers = [BasicPySlotCase() for x in range(10)]
self.run_many(sender, 'foobar', receivers, (test, ))
if __name__ == '__main__':
unittest.main()
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