MVC4 TDD-系统.ArgumentNullException:值不能为null

本文关键字：不能 null TDD- 系统 ArgumentNullException MVC4 | 更新日期: 2023-09-27 18:00:54

我是mvc4和TDD的新手。

当我尝试运行这个测试时，它失败了，我不知道为什么。我已经尝试了很多东西，我开始绕圈子跑了。

    // GET api/User/5
    [HttpGet]
    public HttpResponseMessage GetUserById (int id)
    {
        var user = db.Users.Find(id);
        if (user == null)
        {
            //return Request.CreateResponse(HttpStatusCode.NotFound);
            throw new HttpResponseException(Request.CreateResponse(HttpStatusCode.NotFound));
        }
        return Request.CreateResponse(HttpStatusCode.OK, user);
    }

    [TestMethod]
    public void GetUserById()
    {
        //Arrange
        UserController ctrl = new UserController();
        //Act
        var result = ctrl.GetUserById(1337);
        //Assert
        Assert.IsNotNull(result);
        Assert.AreEqual(HttpStatusCode.NotFound,result.StatusCode);
    }

结果：

Test method Project.Tests.Controllers.UserControllerTest.GetUserById threw exception: 
System.ArgumentNullException: Value cannot be null. Parameter name: request

MVC4 TDD-系统.ArgumentNullException:值不能为null

您的测试失败，因为您在ApiController中使用的Request属性未初始化。如果你打算使用它，请确保你初始化了它：

//Arrange
var config = new HttpConfiguration();
var request = new HttpRequestMessage(HttpMethod.Post, "http://localhost/api/user/1337");
var route = config.Routes.MapHttpRoute("Default", "api/{controller}/{id}");
var controller = new UserController
{
    Request = request,
};
controller.Request.Properties[HttpPropertyKeys.HttpConfigurationKey] = config;
//Act
var result = controller.GetUserById(1337);
相关文章：