'Check UID/GID switches when current effective UID is root.'

def test_root(self):

    self._testUIDGIDSwitch(0, 0, 0, 0, [], [])
    self._testUIDGIDSwitch(0, 0, 1, 0, [1, 0], [])
    self._testUIDGIDSwitch(0, 0, 0, 1, [], [1, 0])
    self._testUIDGIDSwitch(0, 0, 1, 1, [1, 0], [1, 0])
