def setUp(self):
        class STATUS(Values):
            OK = ValueConstant("200")
            NOT_FOUND = ValueConstant("404")

        self.STATUS = STATUS
Create a fresh new L{Values} subclass for each unit test to use.  Since
dataset/ETHPy150Open nlloyd/SubliminalCollaborator/libs/twisted/python/test/test_constants.py/ValuesTests.setUp