def test_deprecatedReplacement(self):
        """
        L{deprecated} takes an additional replacement parameter that can be used
        to indicate the new, non-deprecated method developers should use.  If
        the replacement parameter is a string, it will be interpolated directly
        into the warning message.
        """
        version = Version('Twisted', 8, 0, 0)
        dummy = deprecated(version, "something.foobar")(dummyCallable)
        self.assertEqual(dummy.__doc__,
            "\n"
            "    Do nothing.\n\n"
            "    This is used to test the deprecation decorators.\n\n"
            "    Deprecated in Twisted 8.0.0; please use "
            "something.foobar"
            " instead.\n"
            "    ")

        L{deprecated} takes an additional replacement parameter that can be used
        to indicate the new, non-deprecated method developers should use.  If
        the replacement parameter is a string, it will be interpolated directly
        into the warning message.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/python/test/test_deprecate.py