def test_render(self):
        self.check_html(self.widget, 'email', 'test@example.com', html='<input type="file" name="email" />')
        self.check_html(self.widget, 'email', '', html='<input type="file" name="email" />')
        self.check_html(self.widget, 'email', None, html='<input type="file" name="email" />')
FileInput widgets never render the value attribute. The old value
dataset/ETHPy150Open django/django/tests/forms_tests/widget_tests/test_fileinput.py/FileInputTest.test_render