对用户身份的空引用

Question

我是编写单元测试用例的新手。我在User.Identity 上遇到错误。我看到嘲笑是解决这个问题的方法，我尝试了这在我的情况下不起作用。我已经添加了我的代码

我的控制器

public ActionResult CreateStage ( EnthiranStageViewModel enthiranStage )
{
    if ( ModelState.IsValid )
    {
        Stage stage = enthiran.Insert_Stage(enthiranStage);
        //logging Stage Creation
        util.ApplicationLog(new ViewModel.Logs.ApplicationLogViewModel
        {
         GameCategorys = GameCategory.Enthiran,
         Event = Events.EnthiranStageCreation,
         SessionAttemptId = null,
         UserId = User.Identity.GetUserId<int>( ),
         OptionalParameter1 = enthiranStage.GameId,
         OptionalParameter2 = stage.Id,
         Description = "Enthiran stage created"
        });
        return RedirectToAction("Stages", new
        {
            id = stage.GameId
        });
    }
    return View( );
}

下面是我的测试用例

[TestMethod( )]
public void createStage ( )
{
    EnthiranStageViewModel enthiranStage = new EnthiranStageViewModel
    {
        StageType=0,
        TriggerBeginType = Akton.Areas.Challenge.Models.TriggerType.Manual,
        TriggerEndType= Akton.Areas.Challenge.Models.TriggerType.Manual,
        TimeLimit = new TimeSpan(9, 6, 13),
        TriggerBeginTime= new DateTime(2016, 09, 3, 9, 6, 13),
        TriggerEndTime= new DateTime(2016, 09, 3, 9, 6, 13),
        StartValueType= Akton.Areas.Challenge.Models.StartValueType.Global,
        StageDate= new DateTime(2016, 09, 3, 9, 6, 13),
        Proforma=25,
        GameId=19,
        CreatedTime=new DateTime(2016, 09, 3, 9, 6, 13),
        UpdatedTime= new DateTime(2016, 09, 3, 9, 6, 13),
        StageName="Test",

    };
    EnthiranController controller = new EnthiranController( );
    JsonResult actual = controller.CreateStage(enthiranStage) as JsonResult;
    var result = actual.Data;
    Assert.AreEqual("{ success = True }", result.ToString( ));
}

这里我必须在ViewModel.Logs.ApplicationLogViewModel 中传递userId，我不知道该怎么做。

如何获取通过applicationLogViewModel 的userId？

Answer 1

一种解决方案是更改EnthiranController 并传递，例如IUserContext，如下所示：

public interface IUserContext
{
    public IPrincipal User {get;}
}

然后通过构造函数将其传递给控制器​​，并使用该上下文来检索用户。

ctor EnthiranController(IUserContext userContext)

然后稍微更改单元测试以模拟所有这些接口。您也可以使用ActionResult 或RedirectToRouteResult 代替JsonResult，如下例所示。

[TestMethod( )]
public void createStage ( )
{
    //arrange
    EnthiranStageViewModel enthiranStage = new EnthiranStageViewModel
    {
        StageType=0,
        TriggerBeginType = Akton.Areas.Challenge.Models.TriggerType.Manual,
        TriggerEndType= Akton.Areas.Challenge.Models.TriggerType.Manual,
        TimeLimit = new TimeSpan(9, 6, 13),
        TriggerBeginTime= new DateTime(2016, 09, 3, 9, 6, 13),
        TriggerEndTime= new DateTime(2016, 09, 3, 9, 6, 13),
        StartValueType= Akton.Areas.Challenge.Models.StartValueType.Global,
        StageDate= new DateTime(2016, 09, 3, 9, 6, 13),
        Proforma=25,
        GameId=19,
        CreatedTime=new DateTime(2016, 09, 3, 9, 6, 13),
        UpdatedTime= new DateTime(2016, 09, 3, 9, 6, 13),
        StageName="Test"    
    };

    Mock<IPrincipal> mockPrincipal = new Mock<IPrincipal>();
    //TODO: setup mockPrincipal
    Mock<IUserContext> mockUserContext = new Mock<IUserContext>();
    mockUserContext.Setup(p => p.User).Returns(mockPrincipal.Object);

    EnthiranController controller = new EnthiranController(mockUserContext.Object);

    //act
    var actual = controller.CreateStage(enthiranStage) as RedirectToRouteResult; 

    //assert
    Assert.IsNotNull(actual);
}