Moq框架Func <T,T>

Question

我是Moq和TDD的新手,我想要做的是在存储库接口上设置方法.

这是全文.

我有一个名为Tenant的域实体类,其属性为BusinessIdentificationNumber

public class Tenant:EntityBase<Tenant>,IAggregateRoot
{
 ...
 public string BusinessIdentificationNumber {get;set;}
 ...
}

接下来我有这个实体的存储库,接口就像

public interface IRepository<T>
{
 ...
 T FindBy(Func<T,bool> func);
 ...
}

问题所在,我使用的域名服务包含创建租户的规则,就像

public class TenantCreationService:ITenantCreationService
{
    public TenantCreationService(IRepository<Tenant> tenantRepository){...}

    public void CreateTenant(Tenant tenant)
    {
        //from here there is call to IRepository<Tenant>.FindBy(funcMethod);
    }
}

在我测试TenantCreationService的单元测试中,我模拟了传递给构造函数的存储库,但我想测试该功能:

• 当具有BusinessIdentificationNumber的租户已经存在于存储或会话中时,应该返回它.

所以我试着这样做

repositoryMock.Setup(x=>x.FindBy(It.Is<Tenant>(t=>t.BusinessIdentificationNumber
   == _tenantInTest.BusinessIdentificationNumber))).Returns(_tenantInTest) 

但它没有编译.你知道我想做什么吗？

编辑:当我尝试编译下面的代码片段

repositoryMock.Setup(e => e.FindBy(t => t.BusinessNumber == _validTenant.BusinessNumber)).Returns(
                _validTenant);

我得到例外

Unsupported expression: t => (t.BusinessNumber == value(DP.IPagac.UnitTests.DP.IPagac.Module.TenantManagement.TenantDomainServiceTests)._validTenant.BusinessNumber)

Answer 1

我认为你正在尝试的是这个(删除了一些无关的东西,例如创建了ITenent,因此可以动态模拟):

[TestFixture]
public class Test
{
    [Test]
    public void CreateTenentAlreadyExistsTest()
    {
        var tenentMock = new Mock<ITenant>();
        var repoMock = new Mock<IRepository<ITenant>>();

        tenentMock.Setup(t => t.BusinessIdentificationNumber).Returns("aNumber");

        repoMock.Setup(r => r.FindBy(It.Is<System.Func<ITenant, bool>>(func1 => func1.Invoke(tenentMock.Object)))).Returns(tenentMock.Object);

        var tenantCreationService = new TenantCreationService(repoMock.Object);

        tenantCreationService.CreateTenant(tenentMock.Object);

        tenentMock.VerifyAll();
        repoMock.VerifyAll();
    }
}

public interface ITenant
{
    string BusinessIdentificationNumber { get; set; }
}

public class Tenant : ITenant
{
    public string BusinessIdentificationNumber { get; set; }
}

public interface IRepository<T>
{
    T FindBy(System.Func<T, bool> func);
}

public class TenantCreationService : ITenantCreationService
{
    private readonly IRepository<ITenant> _tenantRepository;

    public TenantCreationService(IRepository<ITenant> tenantRepository)
    {
        _tenantRepository = tenantRepository;
    }

    public void CreateTenant(ITenant tenant)
    {
        var existingTenant =
            _tenantRepository.FindBy(t => t.BusinessIdentificationNumber == tenant.BusinessIdentificationNumber);

        if (existingTenant == null)
        {
            //do stuff
        }
    }
}

public interface ITenantCreationService
{
    void CreateTenant(ITenant tenant);
}