'Allow for testing the template context rendered to verify no data leakage.
Usage::
def setUp(self):
self.context_data.append(self.pip)'

def _test_context(self, response):

    for key in list(response.context.keys()):
        obj = response.context[key]
        for not_obj in self.context_data:
            if (isinstance(obj, list) or isinstance(obj, set) or isinstance(obj, tuple)):
                self.assertNotIn(not_obj, obj)
                print(('%s    not    in    %s' % (not_obj, obj)))
            else:
                self.assertNotEqual(not_obj, obj)
                print(('%s    is    not    %s' % (not_obj, obj)))
