def test_form__clean(self):
        def get_form():
            class _Form(Form):
                fields=[
                    Field('first', convs.Int()),
                ]

                def clean__first(self, value):
                    pass
        self.assertRaises(TypeError, get_form)
Assert clean__ method existance causes errors
dataset/ETHPy150Open SmartTeleMax/iktomi/tests/forms/forms.py/FormErrorsTests.test_form__clean