Moq框架Func< T，T> [英] Moq framework Func<T,T>

问题描述

我是Moq和TDD的新手，我想做的是在存储库接口上设置方法.

I am new with Moq and TDD and what I am trying to do is to set up method on repository interface.

这是全文.

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

I have a domain entity class called Tenant with property BusinessIdentificationNumber

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

下一步，我有这个实体的存储库，其接口就像

Next I have repository for this entity which interface is like

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

问题出在哪里，我使用的域服务包含创建租户的规则，就像

where the problem is, I use a domain service which holds the rules for creating a tenant and is like

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:

And in unit testing where I am testing the TenantCreationService I mock the repository passed to constructor, but I would like to test the feature :

• 当具有BusinessIdentificationNumber的租户已存在于存储或会话中时，应将其返回.

所以我试图做到这一点

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

，但无法编译.你知道我想做什么吗?

but it does not compile. You know what I want to do?

当我尝试编译下面的代码段

when i try to compile the snippet below

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)

推荐答案

我认为您要达到的目的是这样的(删除了一些无关紧要的东西，并创建了ITenent，以便可以对其进行动态模拟):

I think what you are trying the acheive is this (removed some things that were extraneous for example and created ITenent so it can be mocked dynamically):

[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);
}

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