'Test it keeps variable value stable in a single path.'

def testVariableValueIsStableInASinglePath(self):

    processor = windows.EnvVarsPostProcessor({'foo': ['bar', 'blah']})
    self.assertEqual(set(processor.Process('C:\\WINDOWS\\%foo%\\%foo%\\something')), set(['C:\\WINDOWS\\bar\\bar\\something', 'C:\\WINDOWS\\blah\\blah\\something']))
