使用假 HTTPContext 单元测试 ASP.NET Web API 控制器 [英] Unit Test ASP.NET Web API controller with fake HTTPContext

问题描述

我使用以下方法通过 ASP.NET Web API 控制器上传文件.

I'm using the following approach to upload files through ASP.NET Web API controllers.

[System.Web.Http.HttpPost]
public HttpResponseMessage UploadFile()
{
    HttpResponseMessage response;

    try
    {
        int id = 0;
        int? qId = null;
        if (int.TryParse(HttpContext.Current.Request.Form["id"], out id))
        {
            qId = id;
        }

        var file = HttpContext.Current.Request.Files[0];

        int filePursuitId = bl.UploadFile(qId, file);
    }
    catch (Exception ex)
    {

    }

    return response;
}

在我的单元测试中，我在调用 UploadFile 操作之前手动创建了一个 HTTPContext 类:

In my unit tests I've created an HTTPContext class manually before calling the UploadFile action:

var request = new HttpRequest("", "http://localhost", "");
var context = new HttpContext(request, new HttpResponse(new StringWriter()));
HttpContext.Current = context;

response = controller.UploadFile();

不幸的是，我无法向 Form 集合添加自定义值，因为它是只读的.我也无法更改 Files 集合.

Unfortunately, I wasn't able to add custom values to the Form collection, since it's read-only. Also I couldn't change the Files collection.

是否有任何方法可以将自定义值添加到 Request 的 Form 和 Files 属性以添加所需的数据(id 和文件内容)) 在单元测试期间?

Is there any way to add custom values to the Form and Files properties of the Request to add needed data (id and file content) during the unit test?

推荐答案

使用一些模拟框架，例如 Moq反而.使用您需要的任何数据创建一个模拟 HttpRequestBase 和模拟 HttpContextBase，并将它们设置在控制器上.

Use some mocking framework like Moq instead. Create a mock HttpRequestBase and mock HttpContextBase with whatever data you need and set them on the controller.

using Moq;
using NUnit.Framework;
using SharpTestsEx;

namespace StackOverflowExample.Moq
{
    public class MyController : Controller
    {
        public string UploadFile()
        {
            return Request.Form["id"];
        }
    }

    [TestFixture]
    public class WebApiTests
    {
        [Test]
        public void Should_return_form_data()
        {
            //arrange
            var formData = new NameValueCollection {{"id", "test"}};
            var request = new Mock<HttpRequestBase>();
            request.SetupGet(r => r.Form).Returns(formData);
            var context = new Mock<HttpContextBase>();
            context.SetupGet(c => c.Request).Returns(request.Object);

            var myController = new MyController();
            myController.ControllerContext = new ControllerContext(context.Object, new RouteData(), myController);

            //act
            var result = myController.UploadFile();

            //assert
            result.Should().Be.EqualTo(formData["id"]);
        }
    }
}

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