在单元测试中设置HttpContext.Current.Session

小编典典

在单元测试中设置HttpContext.Current.Session

我有一个要尝试进行单元测试的Web服务。在服务中，它从HttpContext类似的方法中提取几个值，如下所示：

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

在单元测试中，我正在使用简单的工作程序请求创建上下文，如下所示：

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

但是，每当我尝试设置 HttpContext.Current.Session

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

我得到的null引用异常HttpContext.Current.Session为null。

有什么办法可以在单元测试中初始化当前会话？

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2020-05-19

共1个答案

小编典典

我们不得不HttpContext通过使用a HttpContextManager并从应用程序以及单元测试中调用工厂来进行模拟

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，将取代任何调用HttpContext.Current与HttpContextManager.Current并有机会获得同样的方法。然后，当您进行测试时，您还可以访问HttpContextManager并模拟您的期望

这是使用Moq的示例：

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;
}

然后在单元测试中使用它，我在Test Init方法中调用它

HttpContextManager.SetCurrentContext(GetMockedHttpContext());

然后，您可以在上述方法中，将期望从Session中获得的预期结果添加到Web服务中。

2020-05-19