def test_calling_more_than_once(self):
        request = self.rf.get('/')
        view = InstanceView.as_view()
        self.assertNotEqual(view(request), view(request))
Test a view can only be called once.
dataset/ETHPy150Open django/django/tests/generic_views/test_base.py/ViewTest.test_calling_more_than_once