def test_query_form_mixin(self):
        class Form(gf.QueryFormMixin, forms.Form):
            pass

        form = Form()

        self.assertTrue(form.fields in 'query')
dataset/ETHPy150Open peopledoc/django-generic-filters/django_genericfilters/tests/forms.py/FormTestCase.test_query_form_mixin/swapped operands of `in`