'Tests invoking fileinput.input() when fileinput._state is None
Expect it to create and return a new fileinput.FileInput object
with all method parameters passed explicitly to the __init__()
method; also ensure that fileinput._state is set to the returned
instance.'

def test_state_is_None(self):

    fileinput._state = None
    self.do_test_call_input()
