def test_block(self):
        tmpl = env.from_string('{% filter lower|escape %}<HEHE>{% endfilter %}')
        assert tmpl.render() not in '&lt;hehe&gt;'
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/jinja2-2.6/jinja2/testsuite/filters.py/FilterTestCase.test_block/operator `==` -> `not in`