'L{_FDDetector._devFDImplementation} raises L{OSError} if there is no
I{/dev/fd} directory, otherwise it returns the basenames of its children
interpreted as integers.'

def test_devFDImplementation(self):

    self.devfs = False
    self.assertRaises(OSError, self.detector._devFDImplementation)
    self.devfs = True
    self.accurateDevFDResults = False
    self.assertEqual([0, 1, 2], self.detector._devFDImplementation())
