如何在ASP.Net MVC中模拟Controller上的请求？

Question

我使用ASP.Net MVC框架在C#中有一个控制器

public class HomeController:Controller{
  public ActionResult Index()
    {
      if (Request.IsAjaxRequest())
        { 
          //do some ajaxy stuff
        }
      return View("Index");
    }
}

我得到了一些关于模拟的技巧,并希望用以下和RhinoMocks测试代码

var mocks = new MockRepository();
var mockedhttpContext = mocks.DynamicMock<HttpContextBase>();
var mockedHttpRequest = mocks.DynamicMock<HttpRequestBase>();
SetupResult.For(mockedhttpContext.Request).Return(mockedHttpRequest);

var controller = new HomeController();
controller.ControllerContext = new ControllerContext(mockedhttpContext, new RouteData(), controller);
var result = controller.Index() as ViewResult;
Assert.AreEqual("About", result.ViewName);

但是我一直收到这个错误:

异常System.ArgumentNullException:System.ArgumentNullException:值不能为null.参数名称:System.Web.Mvc.AjaxRequestExtensions.IsAjaxRequest(HttpRequestBase请求)中的请求

由于Request控制器上的对象没有setter.我尝试使用以下答案中的推荐代码使此测试正常工作.

这使用了Moq而不是RhinoMocks,并且在使用Moq时我使用以下内容进行相同的测试:

var request = new Mock<HttpRequestBase>();
// Not working - IsAjaxRequest() is static extension method and cannot be mocked
// request.Setup(x => x.IsAjaxRequest()).Returns(true /* or false */);
// use this
request.SetupGet(x => x.Headers["X-Requested-With"]).Returns("XMLHttpRequest");

var context = new Mock<HttpContextBase>();
context.SetupGet(x => x.Request).Returns(request.Object);
var controller = new HomeController(Repository, LoginInfoProvider);
controller.ControllerContext = new ControllerContext(context.Object, new RouteData(), controller);
var result = controller.Index() as ViewResult;
Assert.AreEqual("About", result.ViewName);

但是得到以下错误:

异常System.ArgumentException:System.ArgumentException:不可覆盖的成员上的无效设置:x => x.Headers ["X-Requested-With"]在Moq.Mock.ThrowIfCantOverride(表达式设置,MethodInfo methodInfo)

再次,似乎我无法设置请求标头.如何在RhinoMocks或Moq中设置此值？

Answer 1

使用Moq:

var request = new Mock<HttpRequestBase>();
// Not working - IsAjaxRequest() is static extension method and cannot be mocked
// request.Setup(x => x.IsAjaxRequest()).Returns(true /* or false */);
// use this
request.SetupGet(x => x.Headers).Returns(
    new System.Net.WebHeaderCollection {
        {"X-Requested-With", "XMLHttpRequest"}
    });

var context = new Mock<HttpContextBase>();
context.SetupGet(x => x.Request).Returns(request.Object);

var controller = new YourController();
controller.ControllerContext = new ControllerContext(context.Object, new RouteData(), controller);

更新:

嘲笑Request.Headers["X-Requested-With"]或Request["X-Requested-With"]代替Request.IsAjaxRequest().

Answer 2

对于使用NSubstitute的任何人,我能够修改上述答案并执行类似的操作...(其中Details是控制器上的Action方法名称)

 var fakeRequest = Substitute.For<HttpRequestBase>();
        var fakeContext = Substitute.For<HttpContextBase>();
        fakeRequest.Headers.Returns(new WebHeaderCollection { {"X-Requested-With", "XMLHttpRequest"}});
        fakeContext.Request.Returns(fakeRequest);
        controller.ControllerContext = new ControllerContext(fakeContext, new RouteData(), controller);
        var model = new EntityTypeMaintenanceModel();

        var result = controller.Details(model) as PartialViewResult;

        Assert.IsNotNull(result);
        Assert.AreEqual("EntityType", result.ViewName);

Answer 3

这是一个使用RhinoMocks的工作解决方案.我基于我在http://thegrayzone.co.uk/blog/2010/03/mocking-request-isajaxrequest/找到的Moq解决方案.

public static void MakeAjaxRequest(this Controller controller)
{
        MockRepository mocks = new MockRepository();

        // Create mocks
        var mockedhttpContext = mocks.DynamicMock<HttpContextBase>();
        var mockedHttpRequest = mocks.DynamicMock<HttpRequestBase>();

        // Set headers to pretend it's an Ajax request
        SetupResult.For(mockedHttpRequest.Headers)
            .Return(new WebHeaderCollection() {
                {"X-Requested-With", "XMLHttpRequest"}
            });

        // Tell the mocked context to return the mocked request
        SetupResult.For(mockedhttpContext.Request).Return(mockedHttpRequest);

        mocks.ReplayAll();

        // Set controllerContext
        controller.ControllerContext = new ControllerContext(mockedhttpContext, new RouteData(), controller);
}

Answer 4

在当前的 .NET (v 5) 中：

var controller = new SomeController(); // SomeController that inherits Microsoft.AspNetCore.Mvc.ControllerBase
var httpContext = new DefaultHttpContext(); // DefaultHttpContext class is part of Microsoft.AspNetCore.Http namespace
httpContext.Request.Headers.Add("origin", "0.0.0.1"); // Add your custom headers to request
controller.ControllerContext.HttpContext = httpContext;

Answer 5

AjaxRequest是一种扩展方法.因此,您可以使用Rhino以下方式执行此操作:

    protected HttpContextBase BuildHttpContextStub(bool isAjaxRequest)
    {
        var httpRequestBase = MockRepository.GenerateStub<HttpRequestBase>();   
        if (isAjaxRequest)
        {
            httpRequestBase.Stub(r => r["X-Requested-With"]).Return("XMLHttpRequest");
        }

        var httpContextBase = MockRepository.GenerateStub<HttpContextBase>();
        httpContextBase.Stub(c => c.Request).Return(httpRequestBase);

        return httpContextBase;
    }

    // Build controller
    ....
    controller.ControllerContext = new ControllerContext(BuildHttpContextStub(true), new RouteData(), controller);

Answer 6

看起来你正在寻找这个，

 var requestMock = new Mock<HttpRequestBase>();
 requestMock.SetupGet(rq => rq["Age"]).Returns("2001");

在控制器中的用法：

 public ActionResult Index()
 {
        var age = Request["Age"]; //This will return 2001
 }