如何设置 mockRepository 返回方法以返回 IEnumerable<T>？

Question

我是MOQ的新手，我之前已经做过一些编码，但这次我需要在我创建的任务列表中返回2个对象。我尝试使用mockRepository.SetReturnsDefault((命令，但不知何故，它只是不能按照我编程的方式工作。我正在使用这个测试来创建两个不同的任务，我只需要更新我创建的第一个任务(taskPrev(。

我创建了一个处理程序来设置异常，以便我无法创建与其他任务和其他业务规则重叠的任务，并且该测试我正在尝试更新上一个任务并应返回 Sucess，但是当我运行测试时，它返回我添加到列表任务的所有任务，即使我使用函数来过滤这些任务。

我用来过滤的部分是var tasks = 等待_repository。FindBy(x => x.Id ！= 命令。同上(;但它只是返回所有两个任务而不过滤它。

我想知道我是否以错误的方式使用最小起订量还是其他事情，因为我已经搜索了许多 forun，但没有找到任何可以帮助我的东西。

这是我配置 moq 以返回列表的方法：

//Criar 1ª Task
Task taskPrev = new Task(taskTypeId, projectId, costCenterId, Convert.ToDateTime(date), 
startHour, startMinute, endHour, endMinute, workItem, timeSheetId, description);
taskPrev.Id = taskId;
//Criar 2ª Task
Task taskCurr = new Task(taskTypeId, projectId, costCenterId, Convert.ToDateTime(date), 
endHour, startMinute, Convert.ToByte(endHour + 1), endMinute, workItem, timeSheetId, description);
taskCurr.Id = taskId + 1;
List<Task> tasks = new List<Task>();
tasks.Add(taskPrev);
tasks.Add(taskCurr);
// mockRepository.SetReturnsDefault(System.Threading.Tasks.Task.FromResult((IEnumerable<Task>)tasks));
mockRepository.Setup(x => x.FindBy(x => It.IsAny<IAsyncRepository<Task>>())).Returns(System.Threading.Tasks.Task.FromResult((IEnumerable<Task>)tasks.Where(x => x.Id == taskCurr.Id)));

使用mockRepository.SetReturnsDefault((返回两个任务并且不过滤; 使用 mockRepository.SetReturnsDefault(( 和mockRepository.Setup((与仅使用SetReturnsDefault((相同; 并且只使用mockRepository.Setup((返回空。

我正在使用的测试代码：

[Theory]
[InlineData(1,1,1,"2020-03-25",9,0,10,0,"",1,"valor",1,5)]
[InlineData(2,2,2,"2020-03-28",11,0,12,0,"Valor",2,"valor",3,6)]
[InlineData(3,4,5,"2020-03-04",13,0,14,0,"",6,"valor",7,7)]
//Deve permitir editar uma task criada anteriormente a nova task
//EX: 1ª task finaliza as 10:00 e a nova inicia as 10:00, deve permitir uma alteração da 1ª task
public async void Update_PreviousTask_Return_Success_When_CurrentTask_HasStartHour_Equals_PreviousTask_EndHour(
int taskTypeId, int projectId, int costCenterId, string date, byte startHour, byte startMinute,
byte endHour, byte endMinute, string workItem, int timeSheetId, string description, int employeeId, int taskId)
{
//São necessários apenas para criação do handler
var mockRepository = new  Mock<IAsyncRepository<Task>>();
var mockRepositoryTimeSheet = new  Mock<IAsyncRepository<TimeSheet>>();
var mockRepositoryProject = new  Mock<IAsyncRepository<Project>>();            
//Cria handler
TaskHandler handler = new TaskHandler(mockRepository.Object, 
mockRepositoryTimeSheet.Object, mockRepositoryProject.Object);
//Cria Project
Project project = new Project("nameProject", 1, true, 1);
project.Id = projectId;
// List<Project> projects =new List<Project>();
// projects.Add(project);
mockRepositoryProject.SetReturnsDefault(System.Threading.Tasks.Task.FromResult(project));   
//Cria timeSheet 
TimeSheet timeSheet = new TimeSheet(1, Convert.ToDateTime(date).AddDays(-30), Convert.ToDateTime(date).AddDays(30), employeeId);
timeSheet.Id = timeSheetId;
List<TimeSheet> timeSheets = new List<TimeSheet>();
timeSheets.Add(timeSheet);
mockRepositoryTimeSheet.SetReturnsDefault(System.Threading.Tasks.Task.FromResult((IEnumerable<TimeSheet>)timeSheets));
//Criar 1ª Task
Task taskPrev = new Task(taskTypeId, projectId, costCenterId, Convert.ToDateTime(date), 
startHour, startMinute, endHour, endMinute, workItem, timeSheetId, description);
taskPrev.Id = taskId;
//Criar 2ª Task
Task taskCurr = new Task(taskTypeId, projectId, costCenterId, Convert.ToDateTime(date), 
endHour, startMinute, Convert.ToByte(endHour + 1), endMinute, workItem, timeSheetId, description);
taskCurr.Id = taskId + 1;
List<Task> tasks = new List<Task>();
tasks.Add(taskPrev);
tasks.Add(taskCurr);
// mockRepository.SetReturnsDefault(System.Threading.Tasks.Task.FromResult((IEnumerable<Task>)tasks));
mockRepository.Setup(x => x.FindBy(x => It.IsAny<IAsyncRepository<Task>>())).Returns(System.Threading.Tasks.Task.FromResult((IEnumerable<Task>)tasks.Where(x => x.Id == taskCurr.Id)));
//Command para criar a task
UpdateTaskCommand command = new UpdateTaskCommand(taskTypeId, projectId, costCenterId, Convert.ToDateTime(date),
startHour, startMinute, endHour, endMinute, workItem, "descrição Teste", taskId, employeeId);
//Act
var retorno = (CommandResult)await handler.Handle(command);
//Assert
Assert.True(retorno.Sucess);
}

以及无法正常工作的处理程序部分：

var tasks = await _repository.FindBy(x => x.Id != command.Id);
var retorno = tasks.FirstOrDefault(x => (x.TimeSheetId == command.TimeSheetId && x.Date.Date == command.Date.Date)
&&
(
(
(new TimeSpan(x.StartHour, x.StartMinute, 0) <= new TimeSpan(command.StartHour, command.StartMinute, 0))
&& (new TimeSpan(x.EndHour, x.EndMinute, 0) > new TimeSpan(command.StartHour, command.StartMinute, 0))
)
||
(
(new TimeSpan(x.EndHour, x.EndMinute, 0) >= new TimeSpan(command.EndHour, command.EndMinute, 0))
&& (new TimeSpan(x.StartHour, x.StartMinute, 0) < new TimeSpan(command.EndHour, command.EndMinute, 0))
)
||
(
(new TimeSpan(x.StartHour, x.StartMinute, 0) >= new TimeSpan(command.StartHour, command.StartMinute, 0))
&& (new TimeSpan(x.EndHour, x.EndMinute, 0) <= new TimeSpan(command.EndHour, command.EndMinute, 0))
)
));
if (retorno != null)
throw new BusinessException("Não é permitido criar novos registros que se sobreponham a outros existentes", 
nameof(command.StartHour) + ", " + nameof(command.StartMinute) + ", " +
nameof(command.EndHour) + ", " + nameof(command.EndMinute), ErrorsEnum.ResourceInvalidField);

Answer 1

我认为您对如何在 Setup 方法中定义预期参数有些困惑。

为了说明这个问题，让我们看一个不涉及 lambda 的设置：

var myMock = new Mock<IMyThing>();
myMock.Setup(m => m.GetById(7)).Returns(new Thing());

这是对 GetById 的调用的设置，其中参数正好为 7。 如果你正在测试的代码调用 GetById(7(，它将得到一个 Thing 对象。 如果调用代码传递 7 以外的任何内容，则设置将不匹配，并且返回将为 null。

您可以使用 It.IsAny(( 使您的设置更加灵活：

var myMock = new Mock<IMyThing>();
myMock.Setup(m => m.GetById(It.IsAny<int>())).Returns(new Thing());

现在，调用代码传递给 GetById(( 的整数并不重要 - 设置将始终匹配，并且您将始终获得非空 Thing。

有了这些理解，让我们看看您的设置：

mockRepository.Setup(x => x.FindBy(x => It.IsAny<IAsyncRepository<Task>>())).Returns(//stuff);

FindBy 方法采用类型Func<Task,bool>的谓词，这里你提供了一个特定的谓词：x => It.IsAny<IAsyncRepository<Task>>()。 由于你提供了特定的参数值，因此调用代码必须与该特定参数完全匹配，否则设置将不匹配。 调用代码传递给 FindBy 的谓词不匹配，因为(x => x.Id != command.Id)！=(x => It.IsAny<IAsyncRepository<Task>>())，并且由于设置不匹配，因此返回 null(或者如果已调用 SetReturnsDefault，它将返回默认返回的任何内容(。

如果您希望您的设置与调用代码可能发送的任何 lambda 匹配，它应如下所示：

mockRepository.Setup(x => x.FindBy(It.IsAny<Func<Task,bool>>())).Returns(//stuff);