我有一个web服务,我试图单元测试。在服务中,它从HttpContext中提取了几个值,如下所示:

 m_password = (string)HttpContext.Current.Session["CustomerId"];
 m_userID = (string)HttpContext.Current.Session["CustomerUrl"];

在单元测试中,我使用一个简单的工作请求创建上下文,如下所示:

SimpleWorkerRequest request = new SimpleWorkerRequest("", "", "", null, new StringWriter());
HttpContext context = new HttpContext(request);
HttpContext.Current = context;

然而,每当我试图设置HttpContext.Current.Session的值时

HttpContext.Current.Session["CustomerId"] = "customer1";
HttpContext.Current.Session["CustomerUrl"] = "customer1Url";

我得到空引用异常,说HttpContext.Current.Session是空的。

是否有方法在单元测试中初始化当前会话?


当前回答

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。

其他回答

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。

我找到了以下在HttpContext中指定用户的简单解决方案:https://forums.asp.net/post/5828182.aspx

Milox解决方案比IMHO接受的解决方案更好,但我在处理url时遇到了一些问题。

我做了一些改变,使它能正常工作与任何url和避免反射。

public static HttpContext FakeHttpContext(string url)
{
    var uri = new Uri(url);
    var httpRequest = new HttpRequest(string.Empty, uri.ToString(),
                                        uri.Query.TrimStart('?'));
    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);

    SessionStateUtility.AddHttpSessionStateToContext(
                                         httpContext, sessionContainer);

    return httpContext;
}

@Ro Hit给出的答案对我帮助很大,但我缺少用户凭据,因为我必须伪造一个用户进行身份验证单元测试。因此,让我描述一下我是如何解决它的。

根据此,如果添加方法

    // using System.Security.Principal;
    GenericPrincipal FakeUser(string userName)
    {
        var fakeIdentity = new GenericIdentity(userName);
        var principal = new GenericPrincipal(fakeIdentity, null);
        return principal;
    }

然后追加

    HttpContext.Current.User = FakeUser("myDomain\\myUser");

到TestSetup方法的最后一行就完成了,添加用户凭据并准备用于身份验证测试。

我还注意到HttpContext中还有其他你可能需要的部分,比如. mappath()方法。这里有一个可用的FakeHttpContext,它可以通过NuGet安装。

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();