在Asp.Net MVC网页API ModelState.IsValid总是正确的测试控制器的时候， [英] ModelState.IsValid always true when testing Controller in Asp.Net MVC Web Api

问题描述

我试图使这一工作，提出了许多谷歌/计算器搜索，没有运气可言。

I have tried to make this works and made many google/stackoverflow searches with no luck at all.

我有一个简单的模型：

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

    [Required]
    [StringLength(100)]
    public string Name { get; set; }
}

在控制器的方法：

// POST: api/Movies
public IHttpActionResult Post([FromBody]MovieModel movieModel)
{
    if (ModelState.IsValid)
    {
        //Code
    }
}

和测试方法（是一个集成测试，但同样会在单元测试发生）：

And a test method (is an integration test, but the same would happen in unit tests):

[TestMethod]
public void MoviesController_Post_Without_Name()
{
    // Arrange
    var model = new MovieModel();
    model.Name = "";

    // Act
    var result = controller.Post(model);

    // Assert
    Assert.IsInstanceOfType(result, typeof(InvalidModelStateResult));
    Assert.AreEqual(6, controller.Get().Count());
}

尽管该模式显然是无效的，它总是IsValid属性计算为true。

Despite the fact that the model is clearly invalid it always evaluate the IsValid property to true.

我试过很多方法至今没有成功。

I tried many approaches so far without success.

推荐答案

您的解决方案可能有效，但更好的方法是使用<一个href=\"https://msdn.microsoft.com/en-us/library/system.web.http.apicontroller.validate(v=vs.118).aspx\"相对=nofollow> ApiController.Validate 方法。

Your solution probably works, but a better way is using ApiController.Validate method.

public void MoviesController_Post_Without_Name()
{
    // Arrange
    var model = new MovieModel();
    model.Name = "";

    // Act
    controller.Validate(model);   //<---- use the built-in method
    var result = controller.Post(model);

    // Assert
    Assert.IsInstanceOfType(result, typeof(InvalidModelStateResult));
    Assert.AreEqual(6, controller.Get().Count());
}

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