public async Task ArrayArgumentShouldBeOkAsync()
        {
            var settings = new Settings();
            var service  = RpcProxyFactory.CreateProxyInstance <ITestJsonRpcService>(_client, settings);

            var totalResult = await service.TotalAsync(new[] { 1, 2, 3, 4, 5 });

            Assert.Equal(15, totalResult);
        }
        public async Task EchoAsyncShouldBeOkAsync()
        {
            var settings = new Settings();
            var service  = RpcProxyFactory.CreateProxyInstance <ITestJsonRpcService>(_client, settings);

            var echoResult = await service.EchoAsync("hello");

            Assert.Equal("hello", echoResult);
        }