如何在单元测试中为 HttpRequest 模拟 UserAgent 属性？

Question

我正在尝试为我的单元测试创建一个伪造的 HttpContext 并且还想设置 UserAgent 属性.

我尝试了下面的代码，但失败了，提示平台不受支持。

var httpRequest = new HttpRequest(null, "http:xyz.com", null);
httpRequest.Headers["UserAgent"] = "unitTest";

var stringWriter = new StringWriter();
var httpResponce = new HttpResponse(stringWriter);
HttpContext context = new HttpContext(httpRequest, httpResponce);

有什么帮助吗？

Answer 1

正如您在参考资料中看到的那样，UserAgent is extracted form the HttpWorkerRequest. The only way to change it, is by calling this constructor of HttpRequest 使用反射来传递 worker 请求：

internal HttpRequest(HttpWorkerRequest wr, HttpContext context)

随着我进一步调查，它似乎从远处 IIS class 检索属性，或者在使用 ISAPI 时使用 Server variable ALL_RAW.

我开始认为这可能会成为被嘲笑的可怕事情。您可能更幸运地自己覆盖 abstract class HttpWorkerRequest，但实施起来可能会成为一场噩梦。

如何在单元测试中为 HttpRequest 模拟 UserAgent 属性？

How to mock the UserAgent property for an HttpRequest in a unit test?

.net

c#

unit-testing

httprequest

httpcontext