在单元测试设置HttpContext.Current.Session [英] Setting HttpContext.Current.Session in a unit test

问题描述

我有我试图单元测试Web服务。在服务它从HttpContext的几个值，像这样：

I have a web service I am trying to unit test. In the service it pulls several values from the HttpContext like so:

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

在单元测试中我创建使用一个简单的工人要求的背景下，像这样：

in the unit test I am creating the context using a simple worker request, like so:

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

然而，每当我尝试设置HttpContext.Current.Session

However, whenever I try to set the values of HttpContext.Current.Session

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

我得到空引用异常，说HttpContext.Current.Session为空。有什么办法到单​​元测试中初始化当前会话？

I get null reference exception that says HttpContext.Current.Session is null. Is there any way to initialize the current session within the unit test?

推荐答案

我们不得不嘲笑的HttpContext 使用 HttpContextManager 并要求从我们的应用程序内的工厂，以及单元测试

We had to mock HttpContext by using a HttpContextManager and calling the factory from within our application as well as the Unit Tests

public class HttpContextManager 
{
    private static HttpContextBase m_context;
    public static HttpContextBase Current
    {
        get
        {
            if (m_context != null)
                return m_context;

            if (HttpContext.Current == null)
                throw new InvalidOperationException("HttpContext not available");

            return new HttpContextWrapper(HttpContext.Current);
        }
    }

    public static void SetCurrentContext(HttpContextBase context)
    {
        m_context = context;
    }
}

您会再与 HttpContextManager.Current 替换为 HttpContext.Current 任何电话，并有机会获得同样的方法。然后，当你测试，你还可以访问 HttpContextManager 和嘲笑你的期望

You would then replace any calls to HttpContext.Current with HttpContextManager.Current and have access to the same methods. Then when you're testing, you can also access the HttpContextManager and mock your expectations

这是使用起订量一个例子：

This is an example using Moq:

private HttpContextBase GetMockedHttpContext()
{
    var context = new Mock<HttpContextBase>();
    var request = new Mock<HttpRequestBase>();
    var response = new Mock<HttpResponseBase>();
    var session = new Mock<HttpSessionStateBase>();
    var server = new Mock<HttpServerUtilityBase>();
    var user = new Mock<IPrincipal>();
    var identity = new Mock<IIdentity>();
    var urlHelper = new Mock<UrlHelper>();

    var routes = new RouteCollection();
    MvcApplication.RegisterRoutes(routes);
    var requestContext = new Mock<RequestContext>();
    requestContext.Setup(x => x.HttpContext).Returns(context.Object);
    context.Setup(ctx => ctx.Request).Returns(request.Object);
    context.Setup(ctx => ctx.Response).Returns(response.Object);
    context.Setup(ctx => ctx.Session).Returns(session.Object);
    context.Setup(ctx => ctx.Server).Returns(server.Object);
    context.Setup(ctx => ctx.User).Returns(user.Object);
    user.Setup(ctx => ctx.Identity).Returns(identity.Object);
    identity.Setup(id => id.IsAuthenticated).Returns(true);
    identity.Setup(id => id.Name).Returns("test");
    request.Setup(req => req.Url).Returns(new Uri("http://www.google.com"));
    request.Setup(req => req.RequestContext).Returns(requestContext.Object);
    requestContext.Setup(x => x.RouteData).Returns(new RouteData());
    request.SetupGet(req => req.Headers).Returns(new NameValueCollection());

    return context.Object;
}

，然后到你的单元测试中使用它，我称之为我的测试初始化​​方法在

and then to use it within your unit tests, I call this within my Test Init method

HttpContextManager.SetCurrentContext(GetMockedHttpContext());

然后你可以在上述方法中添加从会话，你期望提供给您的Web服务预期的结果。

you can then, in the above method add the expected results from Session that you're expecting to be available to your web service.

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