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[英]Unit Test Failing with Moq and xUnit - InvalidOperationException
[英]XUnit Test Moq failing
我是 XUnit 和 Moq 的新手。 我正在嘗試一個簡單的測試,但無法讓它工作。
我有 7 條測試記錄,想為我的測試添加第 8 條。
我的測試總是以原來的 7 條測試記錄而不是 8 條失敗。
我已經按照以下設置了我的測試..
public class CreateHandlerTests
{
private readonly Mock<IUnitOfWork> _mockUnitOfWork;
private readonly Mock<IGenericRepository<ServerAccess>> _mockRepo;
public CreateHandlerTests()
{
_mockUnitOfWork = new Mock<IUnitOfWork>();
_mockRepo = new Mock<IGenericRepository<ServerAccess>>();
}
[Fact]
public async Task ServerAccess_Created()
{
var list = MockData.GetServerAccessList(); // 7 test records
_mockRepo.Setup(x => x.CountAsync()).ReturnsAsync(list.Count);
_mockRepo.Setup(x => x.Add(It.IsAny<ServerAccess>())).Callback<ServerAccess>(item => list.Add(item));
_mockUnitOfWork.Setup(x => x.Repository<ServerAccess>()).Returns(_mockRepo.Object);
var before = await _mockRepo.Object.CountAsync();
var sut = new CreateHandler(_mockUnitOfWork.Object);
await sut.Execute(new CreateCommand()
{
AccessMethod = "New server access method",
Description = "New description"
});
var after = await _mockRepo.Object.CountAsync();
// Assert
Assert.True(after==8);
}
...
}
看來,當我的命令處理程序添加記錄時,我的 Mock IGenericRepository 中的 Add 方法沒有被調用。
下面是我的 IUnitOfWork 界面
public interface IUnitOfWork
{
IGenericRepository<TEntity> Repository<TEntity>() where TEntity : BaseEntity;
Task<int> Complete();
}
這是我的命令處理程序實現
public class CreateHandler : ICommandHandler<CreateCommand>
{
private readonly IUnitOfWork _unitOfWork;
public CreateHandler(IUnitOfWork unitOfWork)
{
_unitOfWork = Guard.Against.Null(unitOfWork, nameof(unitOfWork));
}
public async Task Execute(CreateCommand command)
{
var serverAccess = new ServerAccess()
{
AccessMethod = command.AccessMethod,
Description = command.Description
};
_unitOfWork.Repository<ServerAccess>().Add(serverAccess);
await _unitOfWork.Complete();
}
}
我在模擬設置中錯過了什么嗎?
任何幫助表示贊賞。
問題是因為您返回的是固定值
_mockRepo.Setup(x => x.CountAsync()).ReturnsAsync(list.Count);
上面是一樣的
_mockRepo.Setup(x => x.CountAsync()).ReturnsAsync(7);
因為它是用固定值設置的,所以每次都會返回 7。
使用每次調用預期成員時都會調用的函數/委托。
[Fact]
public async Task ServerAccess_Created() {
var list = MockData.GetServerAccessList(); // 7 test records
_mockRepo
.Setup(x => x.CountAsync())
.ReturnsAsync(() => list.Count); //delegate invoked each time
_mockRepo
.Setup(x => x.Add(It.IsAny<ServerAccess>()))
.Callback(ServerAccess item => list.Add(item)); //delegate invoked each time
_mockUnitOfWork
.Setup(x => x.Repository<ServerAccess>())
.Returns(_mockRepo.Object); //fixed value
int before = await _mockRepo.Object.CountAsync();
CreateHandler sut = new CreateHandler(_mockUnitOfWork.Object);
await sut.Execute(new CreateCommand() {
AccessMethod = "New server access method",
Description = "New description"
});
int after = await _mockRepo.Object.CountAsync();
// Assert
Assert.True(after == 8);
}
但是,上述測試應該被簡化,以根據被測對象斷言實際的預期行為
[Fact]
public async Task ServerAccess_Created() {
//Arrange
_mockUnitOfWork
.Setup(x => x.Repository<ServerAccess>())
.Returns(_mockRepo.Object);
CreateHandler sut = new CreateHandler(_mockUnitOfWork.Object);
//Act
await sut.Execute(new CreateCommand() {
AccessMethod = "New server access method",
Description = "New description"
});
// Assert
_mockRepo.Verify(x => x.Add(It.IsAny<ServerAccess>());
}
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