ASP.NET Core扩展库之Http请求模拟功能的使用

    public class Order
    {
        public string Id { get; set; }

        public string ProductCode { get; set; }

        public decimal Price { get; set; }
        
        public int Quantity { get; set; }

        public decimal Amount { get; set; }
    }

    public class SendMessageRequest
    {
        public string MessageId { get; set; }

        public string Message { get; set; }

        public List<int> UserIds { get; set; }
    }

        public void ConfigureServices(IServiceCollection services)
        {
            services.AddControllers();
            // 启用扩展库
            services.AddExtensions(Configuration);

            // 消息服务所使用的HttpClient名称MESSAGESERVICE
            IHttpClientBuilder messageClient = services.AddHttpClient("MESSAGESERVICE", client =>
            {
                // 设置基础地址
                client.BaseAddress = new Uri("http://api.hello.com/");
            });
            // 只有Mock配置设置为true时，才启用，通过开发应用配置文件来配置
            if (Configuration.GetValue<bool>("Mock"))
            {
                // 配置针对消息服务客户端，POST到/message/send接口的请求，都将返回一个ResponseMessage
                messageClient.AddMockHttpMessageHandler()
                    .AddMock<ResponseMessage>("/message/send", HttpMethod.Post, new ResponseMessage());
            } 

        }

{
  "Mock": true
}

    [Route("api/order")]
    [ApiController]
    public class OrderController : ControllerBase
    {
        readonly HttpClient messageClient;
        public OrderController(IHttpClientFactory clientFactory)
        {
            // 创建消息服务所使用的客户端，名称与配置所使用的名称一致
            // 实际项目中千万不要写上哦~
            messageClient = clientFactory.CreateClient("MESSAGESERVICE");
        }

        [HttpPost]
        public async Task<ResponseMessage> SaveOrder([FromBody]Order order)
        {
            // 保存订单，省略了....
            // 调用消息服务接口
            ResponseMessage response = await messageClient.PostAsync<ResponseMessage>(
                "/message/send", new SendMessageRequest()
                {
                    MessageId = Guid.NewGuid().ToString("N").ToLower(),
                    Message = "订单已提交",
                    UserIds = new List<int>() { 1,2,3}
                });
            // 根据消息服务返回应答继续处理，省略了...

            return response;
        }
    }

{
    "code": "0",
    "message": null,
    "isSuccess": true
}

        [Fact]
        public async Task Test1()
        {
            IServiceCollection services = new ServiceCollection()
                .AddExtensions();

            services.AddHttpClient("TESTCLIENT")
                .AddMockHttpMessageHandler()
                // 请求/test/exception将触发异常
                .AddMock("/test/exception", HttpMethod.Get, new Exception(""))
                // 针对 /test/404 返回404应答
                .AddMock("/test/404", HttpMethod.Get, httpstatusCode.NotFound)
                // 返回指定类型
                .AddMock<int>("/test/obj", HttpMethod.Get, 100)
                // 自定义条件及应答
                .AddMock(request =>
                {
                    if (request.Headers.Contains("hello"))
                    {
                        return true;
                    }
                    return false;
                }, async (request, response) =>
                {
                    // 如果是调用第三方服务，你可以在这里检查request发出的请求内容是否正确

                    // 自定义应答内容
                    await response.WriteObjectAsync(new
                    {
                        test = "Hello World"
                    });
                })
                // 针对所有请求返回字符串Hello
                .AddMock("*", HttpMethod.Get, "Hello");

            IServiceProvider provider = services.BuildServiceProvider();

            IHttpClientFactory clientFactory = provider.GetRequiredService<IHttpClientFactory>();
            HttpClient client = clientFactory.CreateClient("TESTCLIENT");
            client.BaseAddress = new Uri("http://localhost");

            HttpResponseMessage resposne = await client.GetAsync("/test/404");
            Assert.Equal(HttpStatusCode.NotFound, resposne.StatusCode);
        }