从 MVC 4 C# 控制器测试 JSON 结果

本文关键字:测试 JSON 结果 控制器 MVC | 更新日期: 2023-09-27 18:32:59

所以我有一个控制器,可以将 json 返回到我需要测试的视图。我尝试使用具有动态数据类型的反射来访问列表的子属性,但我不断收到类似于"无法强制转换"错误的内容。基本上,我在列表中有一个列表,我想访问和验证有关该列表的内容,但我无法访问它。之前有没有人在 MVC4 中测试过从他们的控制器返回的 json 并有建议?

法典:

// arrange
        var repositoryMock = new Mock<IEdwConsoleRepository>();
        var date = -1;
        var fromDate = DateTime.Today.AddDays(date);
        EtlTableHistory[] tableHistories =
            {
                new EtlTableHistory
                    {
                        Table = new Table(),
                        RelatedStatus = new BatchStatus(),
                        BatchId = 1
                    }
            };
        EtlBatchHistory[] batchHistories = { new EtlBatchHistory
                                             {
                                                 Status = new BatchStatus(),
                                                 TableHistories = tableHistories
                                             } };
        repositoryMock.Setup(repository => repository.GetBatchHistories(fromDate)).Returns((IEnumerable<EtlBatchHistory>)batchHistories);
        var controller = new EdwController(new Mock<IEdwSecurityService>().Object, repositoryMock.Object);
        // act
        ActionResult result = controller.BatchHistories(1);
        // assert
        Assert.IsInstanceOfType(result, typeof(JsonResult), "Result type was incorrect");
        var jsonResult = (JsonResult)result;
        var resultData = (dynamic)jsonResult.Data;
        var returnedHistories = resultData.GetType().GetProperty("batchHistories").GetValue(resultData, null);
        var returnedTableHistoriesType = returnedHistories.GetType();
        Assert.AreEqual(1, returnedTableHistoriesType.GetProperty("Count").GetValue(returnedHistories, null), "Wrong number of logs in result data");

从 MVC 4 C# 控制器测试 JSON 结果

下面是一个示例:

Controller:
    [HttpPost]
    public JsonResult AddNewImage(string buildingID, string desc)
    {
        ReturnArgs r = new ReturnArgs();
        if (Request.Files.Count == 0)
        {
            r.Status = 102;
            r.Message = "Oops! That image did not seem to make it!";
            return Json(r);
        }
        if (!repo.BuildingExists(buildingID))
        {
            r.Status = 101;
            r.Message = "Oops! That building can't be found!";
            return Json(r);
        }
        SaveImages(buildingID, desc);
        r.Status = 200;
        r.Message = repo.GetBuildingByID(buildingID).images.Last().ImageID;
        return Json(r);
    }
    public class ReturnArgs
    {
        public int Status { get; set; }
        public string Message { get; set; }
    }
Test:
    [TestMethod]
    public void AddNewImage_Returns_Error_On_No_File()
    {
        // Arrange
        ExtendedBuilding bld = repo.GetBuildings()[0];
        string ID = bld.Id;
        var fakeContext = new Mock<HttpContextBase>();
        var fakeRequest = new Mock<HttpRequestBase>();
        fakeContext.Setup(cont => cont.Request).Returns(fakeRequest.Object);
        fakeRequest.Setup(req => req.Files.Count).Returns(0);
        BuildingController noFileController = new BuildingController(repo);
        noFileController.ControllerContext = new ControllerContext(fakeContext.Object, new System.Web.Routing.RouteData(), noFileController);
        // Act
        var result = noFileController.AddNewImage(ID, "empty");
        ReturnArgs data = (ReturnArgs)(result as JsonResult).Data;
        // Assert
        Assert.IsTrue(data.Status == 102);
    }

在您的示例中,在我看来问题出在这里:

var resultData = (dynamic)jsonResult.Data;
var returnedHistories = resultData.GetType().GetProperty("batchHistories").GetValue(resultData, null);

resultData 对象将是您在操作中返回的对象的确切类型。因此,如果您执行以下操作:

List<String> list = repo.GetList();
return Json(list);

那么结果数据的类型将是:

List<String>

尝试确保使用 Json(obj) 函数返回对象。

您可以将 Json 反序列化为动态对象,然后请求所需的属性

例:

dynamic obj = Newtonsoft.Json.JsonConvert.DeserializeObject(json);
var propertyValue = obj.MyProperty; //Ask for the right property

可以从 Nuget Json.Net 包中添加 Json 序列化程序。