def test_call_method_pipe(self):
        server = JsonRpcServer(echo_app)
        server.listen(self.pipename(abstract=True))
        addr = server.addresses[0]
        client = JsonRpcClient()
        client.connect(addr)
        result = client.call_method('echo', 'foo')
        self.assertEqual(result, ['foo'])
        server.close()
        client.close()