模拟服务调用对象返回 null

Question

您好 :) 我是在 Unit 中使用 Moq 框架的新手，我有一个问题，正如我将在下面演示的那样，我正在尝试对 MVC 控制器上的服务调用进行 Moq，它将 Session 对象作为参数. 在我的单元测试框架上，我创建了我的对象，在服务调用中设置它，我希望将它作为测试对 Assert 的响应的结果。

问题：我尝试基于其他解决方案模拟 HttpContext，这很有效，因为在控制器端我得到了我在单元测试中设置的值，但是在服务调用的设置时（我有“Mock(MockBehavior.Strict) ;") 当调试器到达控制器时，在实际调用时我收到一个错误，说没有定义 SETUP。或者，如果我取出“MockBehavior.Strict”，控制器上的“模型”变量总是返回 null 而不是我在单元测试类中设置的对象。

这是我的简单单元类，

[TestClass]
public class SearchControllerTest
{
   #region Variables

   Mock<ControllerContext> _controllerContext;
   Mock<ISearchService> _serviceMock;
   SearchController _controller;

   #endregion

   [TestInitialize]
   public void SetUp()
   {
       // Arrange
       _controllerContext = new Mock<ControllerContext>();
       _serviceMock = new Mock<ISearchService>(MockBehavior.Strict);
       _controller = new SearchController(_serviceMock.Object);
   }

   #region Success Test Cases

   [TestMethod]
   public void SearchListTest()
   {
       string pid = "val1";
       string oid = "val2";
       string lang = "val3";
       string tid = "val4";
       string pattern = "val5";

       DocumentViewModel docModel = SetDocumentViewModel();

       // Bypass
       //_controllerContext.Setup(x => x.HttpContext.Session).Returns(_session.Object);

       _controllerContext.SetupGet(p => p.HttpContext.Session["ProjectId"]).Returns("X");
       _controllerContext.SetupGet(p => p.HttpContext.Session["OverlayId"]).Returns(string.Empty);
       _controllerContext.SetupGet(p => p.HttpContext.Session["ProjectLanguage"]).Returns(string.Empty);
       _controllerContext.SetupGet(p => p.HttpContext.Session["NodeId"]).Returns(string.Empty);
       _controller.ControllerContext = _controllerContext.Object;

       _serviceMock.Setup(x => x.FullTextSearchForAll(pid, oid, lang, tid, pattern)).Returns(docModel);

       // Act
       var result = _controller.SearchList(pid, oid, lang, tid, pattern) as PartialViewResult;

       // Assert
       Assert.AreEqual("#0Id", ((DocumentViewModel)result.Model).Rows[0].UID);
    }

    #endregion

    #region Private

    DocumentViewModel SetDocumentViewModel() 
    {
        return new DocumentViewModel()
        {
            Columns = new Service.QueryResultColumn[]
            {
                new Service.QueryResultColumn
                {
                     Alignment = ServiceConstants.Left, 
                     Index = 0, 
                     Visible = true, 
                     Width = 3, 
                     Header = ServiceConstants.Label
                }
            },
            Properties = new DocumentsInfo[]
            {
                new DocumentsInfo()
                {
                    IsCheckInAllowed = true,
                    IsCheckoutAllowed = true,
                    IsDocumentCheckedOut = false,
                    IsPlaceHolder = false,
                    IsUndoCheckoutAllowed = true,
                    lastVersionUid = "123"
                }
            },
            Rows = new Service.QueryResultRow[]
            {
                new Service.QueryResultRow()
                {
                    Children = null,
                    ExtensionData = null,
                    ImageSource = "Source",
                    Items = new Service.QueryResultItem[]
                    {
                        new Service.QueryResultItem()
                        {
                            ExtensionData = null,
                            ImageSource = "Src",
                            Text = "Txt",
                            UID = "uid"
                        }
                    },
                    UID = "#0Id"
                }
            }
        };
     }

    #endregion
 }

这是我的控制器，

 public class SearchController : Controller
 {
    ISearchService _searchService;

    public SearchController(ISearchService searchService) // I use UnityContainer
    {
        _searchService = searchService;
    }

    public PartialViewResult SearchList(string pid, string oid, string lang, string tid, string pattern)
    {
        ViewBag.ProjectId = pid;
        ViewBag.OverlayId = oid;
        ViewBag.ProjectLanguage = lang;
        ViewBag.NodeId = tid;
        ViewBag.Pattern = pattern;

        DocumentViewModel model = null;

        try
        {
            model = _searchService.FullTextSearchForAll(
                Session["ProjectId"] as string,
                Session["OverlayId"] as string,
                Session["ProjectLanguage"] as string,
                Session["ProjectId"] as string,
                pattern
            );
        }
        catch (Exception ex)
        {
            ViewBag.Error = ex.Message;
        }

        // Ajax.OnError() will handle the Custom Exception Error Message
        if (ViewBag.Error != null)
            throw new CustomtException((String)ViewBag.Error);

        return PartialView(model);
    }
 }

感谢您的耐心和时间。 祝你有美好的一天:)

Answer 1

您已经在方法中设置了一些值的参数：

_serviceMock.Setup(x => x.FullTextSearchForAll(pid, oid, lang, tid, pattern)).Returns(docModel);

并试图将 Session 变量作为空字符串

_controllerContext.SetupGet(p => p.HttpContext.Session["OverlayId"]).Returns(string.Empty);

它永远不会匹配。尝试使用 It.IsAny() 设置服务

_serviceMock.Setup(x => x.FullTextSearchForAll(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>())).Returns(docModel);

如果它会喊改变会话设置

Answer 2

我建议为 ProjectId 等创建常量。 al.，然后使用它们来设置你的模拟，验证调用，并设置任何对象的状态。这样可以确保始终使用您期望的值（并且仅使用您期望的值）。