Question

所以，使用NUnit和RhinoMocks：

//Defines basic behavior of all persistable domain objects
public interface IDomainObject {...}

//defines domain objects specific to the Security DB
public interface ISecurityDomainObject : IDomainObject {...}

//Defines a basic transactional data Repository; there are multiple implementors
//which each close TRest to the interface that defines their DB's domain classes
public interface IRepository<TRest> : IDisposable where TRest:IDomainObject
{
    IUnitOfWork BeginUnitOfWork();
    void CommitUnitOfWork(IUnitOfWork unitOfWork);
    void RollBackUnitOfWork(IUnitOfWork unitOfWork);        
    void Save<T>(T domainObject, IUnitOfWork unitOfWork) where T : class, TRest;        
    IQueryable<T> QueryFor<T>(IUnitOfWork unitOfWork) where T :class, TRest;
}

public interface ISecurityRepository:IRepository<ISecurityDomainObject> {}

public class SecurityRepository:ISecurityRepository

...

//This line breaks when run in an NUnit test
var securityRepository = MockRepository.GenerateMock<ISecurityRepository>();
...

我得到的错误是：

System.TypeLoadException : Method 'Save' on type 'ISecurityRepositoryProxyb8e21deb3cb04067a01ac5b63f7045af' from assembly 'DynamicProxyGenAssembly2, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' tried to implicitly implement an interface method with weaker type parameter constraints.
at System.Reflection.Emit.TypeBuilder.TermCreateClass(RuntimeModule module, Int32 tk, ObjectHandleOnStack type)
at System.Reflection.Emit.TypeBuilder.CreateTypeNoLock()
at System.Reflection.Emit.TypeBuilder.CreateType()
at Castle.DynamicProxy.Generators.Emitters.AbstractTypeEmitter.BuildType()
at Castle.DynamicProxy.Generators.InterfaceProxyWithTargetGenerator.GenerateCode(Type proxyTargetType, Type[] interfaces, ProxyGenerationOptions options)
at Castle.DynamicProxy.DefaultProxyBuilder.CreateInterfaceProxyTypeWithoutTarget(Type interfaceToProxy, Type[] additionalInterfacesToProxy, ProxyGenerationOptions options)
at Castle.DynamicProxy.ProxyGenerator.CreateInterfaceProxyTypeWithoutTarget(Type interfaceToProxy, Type[] additionalInterfacesToProxy, ProxyGenerationOptions options)
at Castle.DynamicProxy.ProxyGenerator.CreateInterfaceProxyWithoutTarget(Type interfaceToProxy, Type[] additionalInterfacesToProxy, ProxyGenerationOptions options, IInterceptor[] interceptors)
at Rhino.Mocks.MockRepository.MockInterface(CreateMockState mockStateFactory, Type type, Type[] extras)
at Rhino.Mocks.MockRepository.CreateMockObject(Type type, CreateMockState factory, Type[] extras, Object[] argumentsForConstructor)
at Rhino.Mocks.MockRepository.DynamicMock(Object[] argumentsForConstructor)
at Rhino.Mocks.MockRepository.<>c__DisplayClass7`1.<GenerateMock>b__6(MockRepository r)
at Rhino.Mocks.MockRepository.CreateMockInReplay(Func`2 createMock)
at Rhino.Mocks.MockRepository.GenerateMock(Object[] argumentsForConstructor)
at CSHD.Tests.Unit.Presentation.LoginTests.TestAuthenticationFails() in LoginTests.cs: line 138

当尝试针对具体类生成模拟时，我得到了类似的错误，这次是在QueryFor（）方法上。如果我尝试重新定义在ISecurityRepository接口中使用TRest的方法，我会得到一个“System.BadImageFormatException：尝试加载一个格式不正确的程序。（HRESULT异常：0x8007000B）”这看起来像一个倒退

我认为核心问题是RhinoMocks被通用参数作为泛型类型限制而感到困惑。我不知道它在哪里被混淆，因此我不知道如何或如果我不能混淆它。我有足够的集成测试覆盖率，如果我必须，我可以忽略这些失败的单元测试，但显然我宁愿修复它们，如果可以的话。你的想法？

Answer 1

看起来这是由Castle.DynamicProxy导致的已知问题，该问题已在该项目的最新主干中修复，但在最新的Rhino Mocks版本中仍然存在问题：

http://groups.google.com/group/rhinomocks/browse_thread/thread/2c1b53bf66b77b8e/ad09a6cd1e304a93

如果您喜欢冒险，可以使用最新的DynamicProxy构建自己的Rhino Mocks，并且应该修复它。

Answer 2

看起来Castle Dynamic Proxy（Rhino Mocks用于代理生成）不会正确生成代理类，因为您已经定义了通用参数。如果你这样定义你的IRepository，你可以生成一个代理（因此也就是模拟）：

public interface IRepository<T> : IDisposable where T : class, IDomainObject
{
    IUnitOfWork BeginUnitOfWork();
    void CommitUnitOfWork(IUnitOfWork unitOfWork);
    void RollBackUnitOfWork(IUnitOfWork unitOfWork);        
    void Save(T domainObject, IUnitOfWork unitOfWork);        
    IQueryable<T> QueryFor(IUnitOfWork unitOfWork);
}

如果你确实需要另一种方式定义，你必须提交Rhino Mocks的错误。

无法让RhinoMocks发出遵循泛型类型限制规则的模拟

2 个答案: