什么是单元测试 MVC4 响应状态码

Question

我有一个单元测试可以测试包含太多段的路由，但我想将其扩展为测试 Response Status Code（应该返回 404 代码）。

是否可以使用模拟的 httpContext 并检查状态码？

HttpContextMock.Object.Response.StatusCode 总是返回 0 状态码（我想是因为模拟了 HttpContext 的一部分）。

[TestMethod]
public void RouteWithTooManySegments()
{
    var routes = new RouteCollection();
    MyApp.RouteConfig.RegisterRoutes(routes);

    var httpContextMock = new Mock<HttpContextBase>();
    var httpResponseMock = new Mock<HttpResponseBase>();

    httpContextMock.Setup(c => c.Request.AppRelativeCurrentExecutionFilePath)
        .Returns("~/dawd/dawdaw/dawdaw/daw");

    RouteData routeData = routes.GetRouteData(httpContextMock.Object);

    Assert.IsNull(routeData);
}

使用ErrorController在视图中返回状态码“404”和相应的Response Status Code：

public class ErrorController : Controller
{
    public ActionResult Index()
    {
        return View();
    }

    public ActionResult NotFound()
    {
        Response.StatusCode = 404;
        return View();
    }
}

和Web.Config 规则

 <httpErrors errorMode="Custom" existingResponse="Replace">
  <remove statusCode="404" />
  <error statusCode="404" responseMode="ExecuteURL" path="/Error/NotFound" />
 </httpErrors>

Answer 1

下面的单元测试将验证 HttpStatusCode 将设置为 404。请注意，它必须在控制器的操作中设置，就像您在问题中所做的那样。如果您希望 Web.config 进行交互，那么它更像是一个 Web 集成测试，这是一个完全不同的测试。

[TestMethod]
public void RouteWithTooManySegments()
{
    var httpContextStub = new Mock<HttpContextBase>();
    var httpResponseMock = new Mock<HttpResponseBase>();
    var controllerContextStub = new Mock<ControllerContext>();

    httpContextStub.Setup(x => x.Response).Returns(httpResponseMock.Object);
    controllerContextStub.Setup(x => x.HttpContext)
        .Returns(httpContextStub.Object);

    var sut = new ErrorController
        { ControllerContext = controllerContextStub.Object };

    sut.NotFound();

    httpResponseMock.VerifySet(x => x.StatusCode = 404);
}