def testDarkenedRoom(self):
        darkThings = list(self.observer.findProviders(iimaginary.IVisible, 1))
        self.assertDarkRoom(darkThings[0])
        self.assertEquals(len(darkThings), 1)
Test that when a 'dark' LocationLighting proxy is on a location,
dataset/ETHPy150Open twisted/imaginary/imaginary/test/test_illumination.py/DarknessTestCase.testDarkenedRoom