Guidance on client-side intereception

I'm trying to test a component based on `ChannelFactory` and I'm having difficulties on finding my way into the client pipeline so that I can return a value before hitting the wire.

I tried with a `IClientMessageInterceptor` but the only way to stop the communication is closing/aborting the passed channel factory.

Is there any other suggested approach?

Other than testing, this could be useful to create client-side caching (I couldn't find a way to achieve it either).

Some guidance would be appreciated.

Thanks!