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

问题描述

我有一个 Web 服务，我正在尝试对其进行单元测试.在服务中，它从 HttpContext 中提取几个值，如下所示:

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，我使用一个简单的工作请求创建上下文，如下所示:

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;

但是，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，指出 HttpContext.Current.Session 为空.

I get null reference exception that says HttpContext.Current.Session is null.

有没有办法在单元测试中初始化当前会话?

Is there any way to initialize the current session within the unit test?

推荐答案

我们不得不使用 HttpContextManager 模拟 HttpContext 并从我们的应用程序中调用工厂作为单元测试

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;
    }
}

然后，您可以用 HttpContextManager.Current 替换对 HttpContext.Current 的任何调用，并可以访问相同的方法.然后当你在测试时，你也可以访问HttpContextManager并模拟你的期望

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

这是一个使用 Moq 的示例:

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;
}

然后为了在你的单元测试中使用它，我在我的 Test Init 方法中调用它

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

HttpContextManager.SetCurrentContext(GetMockedHttpContext());

然后，您可以在上述方法中添加来自 Session 的预期结果，您希望这些结果可用于您的 Web 服务.

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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