def METHOD_NAME(self):
    template = "%s"
    response_header = ("XSS-Test", "script")
    message = '<script>alert("hi");</script>'
    def start_response(status, headers):
        assert status == "200 OK"
        assert response_header in headers
    resp = Response(message=message, headers=[response_header], template=template)
    assert resp({}, start_response) == [
        '&lt;script&gt;alert("hi");&lt;/script&gt;'.encode("utf8")
    ]