There has been much hesitation in the community about how PostSharp aspects should be tested and how aspects can consume dependencies from a dependency injection container.
Obviously, we have a lot of experience testing aspects. I finally took the time to write down a set of practices that can be used to create efficient tests of aspects. I also show techniques that allow aspects to consume services from a dependency injection container. Last but not least, I publish and document a test framework for aspect build-time logic, especially logic emitting build-time errors and warnings. The framework is derived from the one we are using internally.
More on our online documentation.