def test_find_widget(self):
        dialog = Dialog()
        tester = ModalDialogTester(dialog.open)

        def check_and_close(tester):
            try:
                with tester.capture_error():
                    widget = tester.find_qt_widget(
                        type_=QtGui.QAbstractButton,
                        test=lambda x: x.text() == 'OK')
                    self.assertIsInstance(widget, QtGui.QPushButton)
            finally:
                tester.close()

        tester.open_and_run(when_opened=check_and_close)
    def test_has_widget(self):
        dialog = Dialog()
        tester = ModalDialogTester(dialog.open)

        def check_and_close(tester):
            try:
                with tester.capture_error():
                    self.assertTrue(
                        tester.has_widget('OK', QtGui.QAbstractButton))
                    self.assertFalse(
                        tester.has_widget(text='I am a virtual button'))
            finally:
                tester.close()

        tester.open_and_run(when_opened=check_and_close)