def _check___str__(self, test, expect):
        f = FrameSet(test)
        m = u'str(FrameSet("{0}")) != {0}: got {1}'
        r = str(f)
        self.assertEqual(r, str(test), m.format(test, r))
        m = u'str(FrameSet("{0}")) returns {1}: got {2}'
        self.assertIsInstance(r, str, m.format(test, str, type(r)))
Return a new environ dict for WSGI 1.x from the given WSGI u.x environ.
dataset/ETHPy150Open sqlboy/fileseq/test/run.py/TestFrameSet._check___str__--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/cherrypy/cherrypy/_cpwsgi.py/downgrade_wsgi_ux_to_1x