human
I wrote the below code

    def func(foo=value):
        pass
    param = inspect.signature(func).parameters['foo']
    assert (argparser.type_conv(param, typ, value, str_choices=['val']) == value)

What's a good function header?
 Here's a good function header?
assistant
#Here's a good function header.

@pytest.mark.parametrize('value,    typ', [(None, None), (42, int)])
def test_conv_default_param(value, typ):