如何使用起订量框架嘲笑ModelState.IsValid？ [英] How to mock ModelState.IsValid using the Moq framework?

问题描述

我检查 ModelState.IsValid 中创建一个Employee像这样我的控制器的操作方法：

I'm checking ModelState.IsValid in my controller action method that creates an Employee like this:

[HttpPost]
public virtual ActionResult Create(EmployeeForm employeeForm)
{
    if (this.ModelState.IsValid)
    {
        IEmployee employee = this._uiFactoryInstance.Map(employeeForm);
        employee.Save();
    }

    // Etc.
}

我要嘲笑它在我使用起订量框架的单元测试方法。我试图嘲弄它是这样的：

I want to mock it in my unit test method using Moq Framework. I tried to mock it like this:

var modelState = new Mock<ModelStateDictionary>();
modelState.Setup(m => m.IsValid).Returns(true);

不过，这将引发在我的单元测试的情况下例外。有人可以帮助我在这里？

But this throws an exception in my unit test case. Can anyone help me out here?

推荐答案

您不必嘲笑它。如果你已经有一个控制器，可以初始化测试时增加一个模型的状态错误：

You don't need to mock it. If you already have a controller you can add a model state error when initializing your test:

// arrange
_controllerUnderTest.ModelState.AddModelError("key", "error message");

// act
// Now call the controller action and it will 
// enter the (!ModelState.IsValid) condition
var actual = _controllerUnderTest.Index();

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