模拟实现IIndex<TKey, TValue>

Question

我使用 IIndex 作为工厂，决定要使用哪个服务。当我尝试对 CommunicationJob 类进行单元测试时，我遇到了对 IIndex 进行模拟的困难。

public class CommunicationJob : BaseJob
{
    private readonly IRepo<Notification> _nr;
    private readonly IIndex<string, IService> _cs;

    public CommunicationJob
    (
        IRepo<Notification> nr,
        IIndex<string, IService> cs
    )
    {
        _nr= nr;
        _cs= cs;
    }

    public void Do(DateTime date)
    {
        foreach (var n in _nr.GetList())
        {
            _cs[n.GetType().Name].Send(n);

            nr.Sent = DateTime.Now;
            nr.Update(n, true);
        }
    }
}

问题在于_cs [n.GetType().Name]为空。有人有解决我的问题的方法吗？一个解决方案可能是在测试之前启动Autofac，但我不知道如何在测试上下文中加载AutoFac。

我的测试看起来像这样：

[Theory]
[InlineData(0)]
[InlineData(1)]
[InlineData(2)]
[InlineData(3)]
public void WithNotifications(int numberOfNotifications)
{
    var fixture = new TestCommunicationJobFixture();

    var sut = fixture.WithNotifications(numberOfNotifications).GetSut();
    sut.Do(new DateTime());

    fixture.MockCommunicationService.Verify(x => x["EmailNotification"].Send(It.Is<Notification>(z => z.Sent != null)), Times.Exactly(numberOfNotifications));
    fixture.MockNotificationRepo.Verify(x => x.Update(It.Is<Notification>(z => z.Sent != null), true), Times.Exactly(numberOfNotifications));
}

- Rikard

---

你的测试是什么样子？ - Mike Stockdale

它只是使用模拟数据初始化一个新的测试类。 - Rikard

Answer 1

所以我已经重新创建了类似于你的设置的东西

public class Something
{
    private readonly IIndex<string, IService> index;
    public Something(IIndex<string, IService> index)
    {
        this.index = index;
    }

    public void DoStuff()
    {
        this.index["someString"].Send();
    }
}

public interface IIndex<TKey, TValue>
{
    TValue this[TKey index] {get;set;}
}

public interface IService
{
    void Send();
}

然后像这样进行测试（使用Moq）：

// Arrange
var serviceMock = new Mock<IService>();

var indexMock = new Mock<IIndex<string, IService>>();
indexMock.Setup(x => x[It.IsAny<string>()]).Returns(serviceMock.Object);

var something = new Something(indexMock.Object);

// Act
something.DoStuff();

// Assert
serviceMock.Verify(x => x.Send());

希望这能为您指明正确的方向。显然，您需要模拟IRepo<Notification>。

- dav_i