[英]Moq: Mocking an interface of abstract base class of a controller
My problem: I want to unittest a controller. This controller has a constructor that includes a repository.我的问题:我想对 controller 进行单元测试。这个 controller 有一个包含存储库的构造函数。 Repositories are named like SomethingRepository
.存储库的名称类似于SomethingRepository
。 SomethingRepository
inherits from abstract class BaseRepository<ReadModel, Dto, Filter>
. SomethingRepository
继承自抽象 class BaseRepository<ReadModel, Dto, Filter>
。 BaseRepository
inherits from interface IRepository<ReadModel, Dto, Filter>
. BaseRepository
继承自接口IRepository<ReadModel, Dto, Filter>
。
When I want to mock SomethingRepository
using Moq, I will need to mock the interface, as far as I understand, since mocking a class will demand an empty constructor which SomethingRepository
and BaseRepository
don't have.当我想使用 Moq 模拟SomethingRepository
时,我需要模拟接口,据我所知,因为 mocking 和 class 将需要一个SomethingRepository
和BaseRepository
没有的空构造函数。 (I don't want to add one) (我不想加一个)
So, I have tried所以,我试过了
Mock.Of<
IRepository<
SomeReadModel,
SomeDto,
SomeFilter>
>();
However, when I try to assign this mock (with a cast) to a variable of type SomethingRepository
, I get an InvalidCastException
:但是,当我尝试将此模拟(带有强制转换)分配给SomethingRepository
类型的变量时,我得到一个InvalidCastException
:
System.InvalidCastException: Unable to cast object of type 'Castle.Proxies.IRepository`3Proxy' to type 'Repositories.SomeRepository'. System.InvalidCastException:无法将类型为“Castle.Proxies.IRepository`3Proxy”的 object 转换为类型“Repositories.SomeRepository”。
How do I fix this?我该如何解决?
Every SomeRepository
is a IRepository<SomeReadModel, SomeDto, SomeFilter>
, but not every IRepository<SomeReadModel, SomeDto, SomeFilter>
is a SomeRepository
.每个SomeRepository
都是IRepository<SomeReadModel, SomeDto, SomeFilter>
,但不是每个IRepository<SomeReadModel, SomeDto, SomeFilter>
都是SomeRepository
。 If your controller injects a SomeRepository
, you have to provide something which is (or inherits from) the SomeRepository
class.如果你的 controller 注入了一个SomeRepository
,你必须提供一些是(或继承自) SomeRepository
class 的东西。
The solution is to change your controller so that it injects a IRepository<SomeReadModel, SomeDto, SomeFilter>
instead.解决方案是更改您的 controller 以便它注入IRepository<SomeReadModel, SomeDto, SomeFilter>
。
The constructor of SomeController
has the following signature which takes in an IRepository
: SomeController
的构造函数具有以下接受IRepository
的签名:
public SomeController(IRepository<ReadModel, Dto, Filter> repository)
: base(repository)
In my test, I was trying to do cast this to the concrete repository:在我的测试中,我试图将其转换为具体的存储库:
SomeRepository repository = (SomeRepository) Mock.of<IRepository<ReadModel, Dto, Filter>>;
new SomeController(repository);
Instead, I need to pass the repository interface into the controller, not the concrete class:相反,我需要将存储库接口传递到 controller,而不是具体的 class:
IRepository<Something> repository = Mock.of<IRepository<ReadModel, Dto, Filter>>;
new SomeController(repository);
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