if __name__ == '__main__': from __init__ import init; init() from unittest import TestCase, main class Test(TestCase): def test_wrapper(self): from ranger.keyapi import Wrapper class dummyfm(object): def move(relative): return "I move down by {0}".format(relative) class commandarg(object): def __init__(self): self.fm = dummyfm arg = commandarg() do = Wrapper('fm') command = do.move(relative=4) self.assertEqual(command(arg), 'I move down by 4') if __name__ == '__main__': main()