在单元测试中访问具有相同类型对象的两个不同列表

Posted 2023-04-13

【中文标题】在单元测试中访问具有相同类型对象的两个不同列表

【英文标题】：Acess two different lists with the same type of objects in unit testing

【发布时间】：2021-11-23 07:46:12

【问题描述】：

如果我能解释我的问题，这是两个方法，一个测试方法和它的目标：

测试方法

[Fact]
public async Task Create_Post_Valid_Id_Valid_Name()

#region Arrange
    var model = new FixedShippingScheduleEditViewModelId = 10, Name = "Schedule";
    var schedules = new List<Hyper360FixedShippingScheduleSummaryModel>()
    new Hyper360FixedShippingScheduleSummaryModelId = 11, Name = "AnotherSchedule";
    var refreshedSchedules = new List<Hyper360FixedShippingScheduleSummaryModel>()
    new Hyper360FixedShippingScheduleSummaryModelId = 10, Name = "Schedule";
    _shippingApiClient.Setup(x => x.GetAllFixedSchedules(CancellationToken.None)).Returns(Task.FromResult((IList<Hyper360FixedShippingScheduleSummaryModel>)schedules));
    _shippingApiClient.Setup(x => x.CreateFixedSchedule(It.Is<FixedShippingScheduleEditModel>(s => s.Name == "Schedule"), CancellationToken.None)).Returns(Task.CompletedTask);
    _shippingApiClient.Setup(x => x.GetAllFixedSchedules(CancellationToken.None)).Returns(Task.FromResult((IList<Hyper360FixedShippingScheduleSummaryModel>)refreshedSchedules));
    _localizationService.Setup(x => x.GetResource("Bizay.Logistic.Admin.Schedules.Notification.Create.Error")).Returns("Success");
    _notificationService.Setup(x => x.SuccessNotification("Success", true));
#endregion
#region Act
    var result = await _scheduleController.Create(model, true, CancellationToken.None);
#endregion
#region Assert
    result.Should().BeOfType<ViewResult>();
    ((ViewResult)result).Model.Should().BeOfType<FixedShippingScheduleEditViewModel>();
    ((FixedShippingScheduleEditViewModel)((ViewResult)result).Model).Name.Should().Be("AnotherSchedule");
    ((FixedShippingScheduleEditViewModel)((ViewResult)result).Model).Id.Should().Be(11);
#endregion

测试方法

[HttpPost]
[ValidateAntiForgeryToken]
[HttpPost, ParameterBasedOnFormName("save-continue", "continueEditing")]
public async Task<ActionResult> Create(FixedShippingScheduleEditViewModel model, bool continueEditing, CancellationToken cancellationToken)

    var schedules = await _shippingApiClient.GetAllFixedSchedules(cancellationToken);
    if (schedules.Any(s => s.Name.Equals(model.Name, StringComparison.InvariantCultureIgnoreCase)))
    
        ModelState.AddModelError(nameof(model.Name), _localizationService.GetResource("Bizay.Logistic.Admin.Schedules.Error.Name.Repeated"));
    
    if (ModelState.IsValid)
    
        await _shippingApiClient.CreateFixedSchedule(new FixedShippingScheduleEditModel  Name = model.Name , cancellationToken);

        var refreshedSchedules = await _shippingApiClient.GetAllFixedSchedules(cancellationToken);
        var schedule = refreshedSchedules?.FirstOrDefault(s => s.Name == model.Name);

        if (schedule == null)
        
            _notificationService.ErrorNotification(_localizationService.GetResource("Bizay.Logistic.Admin.Schedules.Notification.Create.Error"));
            return View(model);
        
        _notificationService.SuccessNotification(_localizationService.GetResource("Bizay.Logistic.Admin.Schedules.Notification.Create.Success"));
        if (continueEditing)
        
            return RedirectToAction("Edit", new  id = schedule.Id );
        
        else
        
            return RedirectToAction("List");
        
    
    return View(model);

这里发生的情况是 schedules.Any(s => s.Name.Equals(model.Name, StringComparison.InvariantCultureIgnoreCase)) 应该在 schedules 列表上工作，而 refreshedSchedules?.FirstOrDefault(s => s.Name == model.Name) 应该在 refreshedSchedules 列表上工作，问题是两个 lambda 都在作用于 schedules清单，知道我该如何完成这项工作吗？

【问题讨论】：

您的minimal reproducible example 缺少ToIList 方法...

尝试在 GetAllFixedSchedules 的设置中使用 It.Is<...>(...)。

@AlexeiLevenkov public IList<T> ToIList<T>(List<T> t) return t;

@AlexeiLevenkov 我用演员替换了ToIlist。

我自己也去过那里。有时在我们寻求简化的过程中，它删除了太多的上下文。通过练习找到平衡。

【参考方案1】：

假设_shippingApiClient 是最小起订量Mock<ShippingApiClient>，您想设置一个Callback 填充一个列表，稍后调用GetAllFixedSchedules() 将完成：

//Arrnge
int id = 10;
string expectedName = "Schedule";
var viewModel = new FixedShippingScheduleEditViewModel  Name = expectedName ;
var scheduleList = new List<Hyper360FixedShippingScheduleSummaryModel>() 
 
    new Hyper360FixedShippingScheduleSummaryModel  Id = id++, Name = "AnotherSchedule"  //Id = 10
;

_shippingApiClient
    .Setup(x => x.CreateFixedSchedule(It.IsAny<FixedShippingScheduleEditModel>(), It.IsAny<CancellationToken>()))
    .Callback((FixedShippingScheduleEditModel model, CancellationToken token) => 
        // TODO: perhaps some asserts here
        model.Id = id; //Since id is being asserted
        scheduleList.Add(new Hyper360FixedShippingScheduleSummaryModel
        
            Id = model.Id,
            Name = model.Name
        );
    )
    .Returns(Task.CompletedTask);

_shippingApiClient
    .Setup(x => x.GetAllFixedSchedules(It.IsAny<CancellationToken>()))
    .ReturnsAsync(() => scheduleList);

//...code omitted for brevity

//Act
var result = await _scheduleController.Create(viewModel, true, CancellationToken.None);


//Assert
result.Should().BeOfType<RedirectToActionResult>();
RedirectToActionResult redirect = (RedirectToActionResult) result;
redirect.ActionName.Should().Be("Edit");
redirect.RouteValues["id"].Should().Be(id);

通过回调，您可以设置具有某种（本地保存）状态的模拟。

或者，设置顺序调用，请参阅Different return values the first and second time with Moq，您首先返回初始列表，然后返回添加项目的列表，但这很脆弱 - 如果您在中间添加另一个调用，结果将关闭。