我之前写过一些关于这方面的东西。

单元测试MVC3 .NET中的HttpContext.Current.Session

希望能有所帮助。

[TestInitialize]
public void TestSetup()
{
    // We need to setup the Current HTTP Context as follows:            
 
    // Step 1: Setup the HTTP Request
    var httpRequest = new HttpRequest("", "http://localhost/", "");
 
    // Step 2: Setup the HTTP Response
    var httpResponce = new HttpResponse(new StringWriter());
 
    // Step 3: Setup the Http Context
    var httpContext = new HttpContext(httpRequest, httpResponce);
    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 });
 
    // Step 4: Assign the Context
    HttpContext.Current = httpContext;
}

[TestMethod]
public void BasicTest_Push_Item_Into_Session()
{
    // Arrange
    var itemValue = "RandomItemValue";
    var itemKey = "RandomItemKey";
             
    // Act
    HttpContext.Current.Session.Add(itemKey, itemValue);
             
    // Assert
    Assert.AreEqual(HttpContext.Current.Session[itemKey], itemValue);
}

对我有效的答案是@Anthony写的，但你必须加上另一行 请求。SetupGet(req => req. headers)。返回(新NameValueCollection ()); 所以你可以用这个: HttpContextFactory.Current.Request.Headers。Add(关键字,值);

在asp.net Core / MVC 6 rc2中，你可以设置HttpContext

var SomeController controller = new SomeController();

controller.ControllerContext = new ControllerContext();
controller.ControllerContext.HttpContext = new DefaultHttpContext();
controller.HttpContext.Session = new DummySession();

Rc 1为

var SomeController controller = new SomeController();

controller.ActionContext = new ActionContext();
controller.ActionContext.HttpContext = new DefaultHttpContext();
controller.HttpContext.Session = new DummySession();

https://stackoverflow.com/a/34022964/516748

考虑使用Moq

new Mock<ISession>();

你可以试试FakeHttpContext:

using (new FakeHttpContext())
{
   HttpContext.Current.Session["CustomerId"] = "customer1";       
}

试试这个:

        // MockHttpSession Setup
        var session = new MockHttpSession();

        // MockHttpRequest Setup - mock AJAX request
        var httpRequest = new Mock<HttpRequestBase>();

        // Setup this part of the HTTP request for AJAX calls
        httpRequest.Setup(req => req["X-Requested-With"]).Returns("XMLHttpRequest");

        // MockHttpContextBase Setup - mock request, cache, and session
        var httpContext = new Mock<HttpContextBase>();
        httpContext.Setup(ctx => ctx.Request).Returns(httpRequest.Object);
        httpContext.Setup(ctx => ctx.Cache).Returns(HttpRuntime.Cache);
        httpContext.Setup(ctx => ctx.Session).Returns(session);

        // MockHttpContext for cache
        var contextRequest = new HttpRequest("", "http://localhost/", "");
        var contextResponse = new HttpResponse(new StringWriter());
        HttpContext.Current = new HttpContext(contextRequest, contextResponse);

        // MockControllerContext Setup
        var context = new Mock<ControllerContext>();
        context.Setup(ctx => ctx.HttpContext).Returns(httpContext.Object);

        //TODO: Create new controller here
        //      Set controller's ControllerContext to context.Object

并添加类:

public class MockHttpSession : HttpSessionStateBase
{
    Dictionary<string, object> _sessionDictionary = new Dictionary<string, object>();
    public override object this[string name]
    {
        get
        {
            return _sessionDictionary.ContainsKey(name) ? _sessionDictionary[name] : null;
        }
        set
        {
            _sessionDictionary[name] = value;
        }
    }

    public override void Abandon()
    {
        var keys = new List<string>();

        foreach (var kvp in _sessionDictionary)
        {
            keys.Add(kvp.Key);
        }

        foreach (var key in keys)
        {
            _sessionDictionary.Remove(key);
        }
    }

    public override void Clear()
    {
        var keys = new List<string>();

        foreach (var kvp in _sessionDictionary)
        {
            keys.Add(kvp.Key);
        }

        foreach(var key in keys)
        {
            _sessionDictionary.Remove(key);
        }
    }
}

这将允许您同时测试会话和缓存。

你可以通过创建一个新的HttpContext来“伪造”它，就像这样:

http://www.necronet.org/archive/2010/07/28/unit-testing-code-that-uses-httpcontext-current-session.aspx

我把这段代码放到一个静态helper类中，如下所示:

public static HttpContext FakeHttpContext()
{
    var httpRequest = new HttpRequest("", "http://example.com/", "");
    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;
}

或者不是使用反射来构造新的httpessionstate实例，你可以将你的httpessionstatecontainer附加到HttpContext(根据Brent M. Spell的评论):

SessionStateUtility.AddHttpSessionStateToContext(httpContext, sessionContainer);

然后你可以像这样在单元测试中调用它:

HttpContext.Current = MockHelper.FakeHttpContext();