def test_noTLSBeforeStartTLS(self):
        """
        The C{TLS} attribute of a L{Connection} instance is C{False} before
        L{Connection.startTLS} is called.
        """
        skt = FakeSocket(b"")
        protocol = FakeProtocol()
        conn = Connection(skt, protocol)
        self.assertFalse(conn.TLS)

        The C{TLS} attribute of a L{Connection} instance is C{False} before
        L{Connection.startTLS} is called.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/internet/test/test_tcp.py