Moq 模拟和跟踪会话值

我在使用 Moq 进行模拟返回会话值集时遇到问题。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;
        });
  }
}

当我尝试使用外部获取值时

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

做一些设置 Session["id"] 的事情

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

sessionid 结果是-1。但我可以使用获取设置的会话值

th.sessionValue

怎么了？我不能简单地通过起订量返回设定值吗？

我需要停止回答自己的问题。事实证明，我需要再次模拟 Session["id"] 像这样......

httpContext.SetupSet(x => x.Session["id"] = It.IsAny<long>())
        .Callback((string name, object val) =>
        {
           sessionValue = (long)val;
           httpContext.SetupGet(x => x.Session["id"]).Returns(sessionValue);
        });