Unit and functional testing a PySide-based application?

Question

I\'m building a PySide 1.1.0-based application, and have been looking for good examples to look at for unit and functional testing my application. I want to be able to do f

Answer 1

In my case, I was getting an error 'QPixmap: Must construct a QApplication before a QPaintDevice'.

If you need to have a QApplication instance for your tests (eg use QPixmap), here's one way to do it. Just create a singleton so that you are ensured one and only one QApplication instance.

This is buried as a helper for tests in the PySide source.

import unittest

from PySide.QtGui import QApplication
_instance = None

class UsesQApplication(unittest.TestCase):
    '''Helper class to provide QApplication instances'''

    qapplication = True

    def setUp(self):
        '''Creates the QApplication instance'''

        # Simple way of making instance a singleton
        super(UsesQApplication, self).setUp()
        global _instance
        if _instance is None:
            _instance = QApplication([])

        self.app = _instance

    def tearDown(self):
        '''Deletes the reference owned by self'''
        del self.app
        super(UsesQApplication, self).tearDown()

and then subclass UsesQApplication

from PySide import QtGui

class Test(UsesQApplication):

    def setUp(self):
        #If you override setup, tearDown, make sure
        #to have a super call
        super(TestFilterListItem, self).setUp()

    def tearDown(self):
        super(TestFilterListItem, self).tearDown()

    def testName(self):
        pix = QtGui.QPixmap(20,20)
        self.assertTrue(True)

hope this helps