Are internal methods supported?

[baynezy]

I have a bug raised on NSubstitute nsubstitute/NSubstitute#866 which after some debugging looks like it makes more sense to be here.

I have a reporoduction case which you can check out here https://github.com/baynezy/NSubstituteIssue

Essentially, this interface can be mocked:

public interface IExample
{
    bool Check();
}

and this one

public interface IExampleWithInternal
{
    internal bool Check();
}

throws a System.TypeLoadException.

Let me know if you need more detail.

Thanks.

[304NotModified]

In addition, this will also give the same exception in Moq. So it's unclear is this a bug, a limitation or NSubstitute and Moq doing incorrect calls.

The full exception stacktrace, with the message from Castle Core "method .. does not have an implementation":

System.TypeLoadException
Method 'Check' in type 'Castle.Proxies.IExampleWithInternalProxy' from assembly 'DynamicProxyGenAssembly2, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' does not have an implementation.
   at System.Reflection.Emit.RuntimeTypeBuilder.CreateTypeNoLock()
   at System.Reflection.Emit.RuntimeTypeBuilder.CreateTypeInfoImpl()
   at System.Reflection.Emit.TypeBuilder.CreateTypeInfo()
   at Castle.DynamicProxy.Generators.Emitters.AbstractTypeEmitter.CreateType(TypeBuilder type)
   at Castle.DynamicProxy.Generators.Emitters.AbstractTypeEmitter.BuildType()
   at Castle.DynamicProxy.Generators.BaseInterfaceProxyGenerator.GenerateType(String typeName, INamingScope namingScope)
   at Castle.DynamicProxy.Generators.BaseProxyGenerator.<>c__DisplayClass13_0.<GetProxyType>b__0(CacheKey cacheKey)
   at Castle.Core.Internal.SynchronizedDictionary`2.GetOrAdd(TKey key, Func`2 valueFactory)
   at Castle.DynamicProxy.Generators.BaseProxyGenerator.GetProxyType()
   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 Moq.CastleProxyFactory.CreateProxy(Type mockType, IInterceptor interceptor, Type[] interfaces, Object[] arguments) in /_/src/Moq/Interception/CastleProxyFactory.cs:line 50
   at Moq.Mock`1.InitializeInstance() in /_/src/Moq/Mock`1.cs:line 309
   at Moq.Mock`1.OnGetObject() in /_/src/Moq/Mock`1.cs:line 323
   at Moq.Mock.get_Object() in /_/src/Moq/Mock.cs:line 181
   at Moq.Mock`1.get_Object() in /_/src/Moq/Mock`1.cs:line 281
   at Target.UnitTests.ReproductionCase.Moq_IExampleWithInternal() 

Tested with version 5.1.1