[TestMethod]
    public void LoginAction_Should_Return_View_and_User_Authenticated()
    {
        // Arrange
        var mock = new Mock<ControllerContext>();
        var mockSession = new Mock<HttpSessionStateBase>();
        mock.Setup(p => p.HttpContext.Session).Returns(mockSession.Object);

        var testData = FakeUserData.CreateTestUsers();
        var repository = new FakeUserRepository(testData);
        var controller = new AccountController(repository);
        controller.ControllerContext = mock.Object;

        // Act
        var result = controller.Login("testuser1","testuser1");

        // Assert
        Assert.AreEqual("testuser1",controller.HttpContext.Session["Username"]);
        Assert.IsTrue((bool)controller.HttpContext.Session["IsAuthenticated"]);
        Assert.IsInstanceOfType(result,typeof(RedirectToRouteResult));
    }

当我运行测试时，controller.HttpContext.Session [“Username”]的值为null，但是我使用Session帮助器将该值设置为用户名。我做的事情完全错了，还是别的什么？任何帮助将不胜感激。