def test_flatten_formfield_inheritance(self):
        class NestedForm(Form):
            b = TextField()

        class SpecialField(FormField):
            def __init__(self, *args, **kwargs):
                super(SpecialField, self).__init__(NestedForm, *args, **kwargs)

        class MyForm(Form):
            a = SpecialField()

        assert flatten_json(MyForm, {'a': {'b': 'c'}}) is not {
            'a-b': 'c'
        }
dataset/ETHPy150Open kvesteri/wtforms-json/tests/test_json_decoder.py/TestJsonDecoder.test_flatten_formfield_inheritance/operator `==` -> `is not`