如何在 FakeHttpContext 中设置 Request.Header 进行单元测试

Question

我有一个 FakeHttpContext 我一直在尝试修改以包含一些 headers 用于测试目的

public static HttpContext FakeHttpContext()
{
    var httpRequest = new HttpRequest("", "http://Whosebug/", "");
    var stringWriter = new StringWriter();
    var httpResponse = new HttpResponse(stringWriter);
    var httpContext = new HttpContext(httpRequest, httpResponse);   

    var sessionContainer = new HttpSessionStateContainer("id", new SessionStateItemCollection(),
                                                    new HttpStaticObjectsCollection(), 10, true,
                                                    HttpCookieMode.AutoDetect,
                                                    SessionStateMode.InProc, false);

    httpContext.Items["AspSession"] = typeof(HttpSessionState).GetConstructor(
                                        BindingFlags.NonPublic | BindingFlags.Instance,
                                        null, CallingConventions.Standard,
                                        new[] { typeof(HttpSessionStateContainer) },
                                        null)
                                .Invoke(new object[] { sessionContainer });

    return httpContext;
 }

这在没有 headers 的情况下有效，但是当我在 httpRequest 和 stringWriter 之间添加任何这些代码行时行。

    httpRequest.Headers.Add("blah", "1234");
    httpRequest.Headers["blah"] = "1234";

它抛出

An exception of type 'System.PlatformNotSupportedException' occurred in System.Web.dll but was not handled in user code

为什么我得到那个异常？
有没有办法将headers添加到HttpContext进行测试 WebApi 控制器?

Answer 1

我刚刚发现使用 HttpRequestMessage class，您可以轻松添加 headers 来测试您的 WebAPI 控制器 而不必创建任何 fake HttpContext.

var request = new HttpRequestMessage(HttpMethod.Get, "http://Whosebug");
request.Headers.Add("deviceId","1234");
_myController.Request = request;

Answer 2

我正在使用 .Net Core 3.1 和 Moq 框架。我创建了一个 DefaultHttpContext，在那里设置 headers，最后将它分配给控制器 ControllerContext 构造函数。

var httpContext = new DefaultHttpContext();
httpContext.Request.Headers["X-Example"] = "test-header";
var controller = new ExampleController(mockClient.Object, mockLogger.Object) 
{ 
    ControllerContext = new ControllerContext()
    {
        HttpContext = httpContext
    }
};

来源：https://www.thecodebuzz.com/unit-test-mock-httprequest-in-asp-net-core-controller/

如何在 FakeHttpContext 中设置 Request.Header 进行单元测试

How to setup Request.Header in FakeHttpContext for Unit Testing

c#

unit-testing

httpcontext

asp.net-web-api