'The C{__str__} for L{UnsupportedMethod} makes it clear that what it
shows is a list of the supported methods, not the method that was
unsupported.'

def test_str(self):

    b = ('b' if _PY3 else '')
    e = error.UnsupportedMethod(['HEAD', 'PATCH'])
    self.assertEqual(str(e), "Expected    one    of    [{b}'HEAD',    {b}'PATCH']".format(b=b))
