我正在尝试在异步调用上使用Moq(4.10),但我无法掌握它。
搜索操作方法,找到我尝试过的答案,但我无法使其正常工作。
这是我的考验
public class Test
{
[Fact]
public void Test_Create()
{
var repositoryMock = new Mock<IRepository>();
repositoryMock
.Setup(repo => repo.CreateAsync(It.IsAny<Aggregate >()))
.Returns(Task.CompletedTask);
/// also tried this
/// => .Returns(Task.FromResult(default(object)))
/// and
/// => .Returns(Task.FromResult(false)));
var useCase = new CreateUseCase(repositoryMock.Object);
Task.Run(async () => { await useCase.HandleAsync(new CreateRequest()); });
repositoryMock.VerifyAll();
}
}
资源
How can I tell Moq to return a Task?
获取此异常
Moq.MockException:'以下关于模拟的设置 'Mock <.Repository.IRepository:00000001>'不匹配:IRepository repo => repo.CreateAsync(It.IsAny
())
回购看起来像这样
public interface IRepository
{
Task CreateAsync(Aggregate aggregate);
}
UseCase
public class CreateUseCase : IUseCaseHandler<CreatRequest>
{
private IRepository _repository;
public CreateUseCase (IRepository repository)
{
_repository= repository?? throw new System.ArgumentNullException(nameof(repository));
}
public async Task HandleAsync(CreateRequest request, CancellationToken? cancellationToken = null)
{
Aggregate aggregate = new Aggregate();
aggregate.Create();
await _repository.CreateAsync(aggregate);
}
}
存储库
public sealed class OrderRepository : ProxyRepository<OrderAggregate>, IOrderRepository
{
public OrderRepository(IUnitOfWork unitOfWork, INotificationDispatcher eventHandler)
: base(unitOfWork, eventHandler)
{
}
async Task IRepository.CreateAsync(Aggregate aggregate)
{
await base.AddAsync(aggregate);
}
}
我做错了什么或想念什么?
答案 0 :(得分:1)
我们通常不必模拟接口方法,除非我在您的问题中遗漏某些东西,否则该方法不会返回任何方法。
public class CreateUseCaseTests
{
[Fact]
public async Task HandleAsync_ShouldCreateRequest()
{
// Arrange
var repositoryMock = new Mock<IRepository>();
var sut = new CreateUseCase(repositoryMock.Object);
// Act
await sut.HandleAsync(new CreateRequest());
// Assert
repositoryMock.Verify(x => x.CreateAsync(It.IsAny<Aggregate>()), Times.Once);
}
}
答案 1 :(得分:1)
我不认为您的问题根本与Moq设置无关。问题在于单元测试使用Task.Run()
运行有意义的代码,这产生了一个新线程。然后回到原始线程,立即测试Moq设置是否已完成。由于被测代码是在不同的线程上启动的,因此很有可能在执行被测代码之前进行成功测试。
您应该更改单元测试以使用async&await运行测试方法,而不是剥离新线程。请注意,测试用例的签名从void
变为async Task
,并且我们await
正在测试的代码。
public class Test
{
[Fact]
public async Task Test_Create()
{
var repositoryMock = new Mock<IRepository>();
repositoryMock
.Setup(repo => repo.CreateAsync(It.IsAny<Aggregate >()))
.Returns(Task.CompletedTask);
var useCase = new CreateUseCase(repositoryMock.Object);
await useCase.HandleAsync(new CreateRequest());
repositoryMock.VerifyAll();
}
}