相关疑难解决方法(0)

我在使用Moq从模拟返回Session值集时遇到问题.使用以下内容

public class TestHelpers
{
 public long sessionValue = -1;
 public HttpContextBase FakeHttpContext()
 {

  var httpContext = new Mock<HttpContextBase>();
  var session = new Mock<HttpSessionStateBase>();
  httpContext.Setup(x => x.Session).Returns(session.Object);
  httpContext.SetupGet(x => x.Session["id"]).Returns(sessionValue);
  httpContext.SetupSet(x => x.Session["id"] = It.IsAny<long>())
        .Callback((string name, object val) =>
        {
           sessionValue = (long)val;
        });
  }
}

当我尝试获取外部使用的值

var th = new TestHelpers();
HttpContextBase httpContext = th.FakeHttpContext();

做一些设置Session ["id"]的东西

var sessionid = httpContext.Session["id"];

sessionid结果为-1.但我可以使用获取设置的会话值

th.sessionValue

怎么了？我不能简单地通过Moq返回设定值吗？