def METHOD_NAME(self):
    for handler in (self.dialog.idle_credits,
                    self.dialog.idle_readme,
                    self.dialog.idle_news):
        self.error.message = ''
        self.view.called = False
        with self.subTest(handler=handler):
            handler()
            self.assertEqual(self.error.message, '')
            self.assertEqual(self.view.called, True)