Feature: Override existing Modules

Hello everyone,

at the moment i am looking for a nice way to mock my modules and at this point i noticed that it would be nice if i could override single modules in my Container with custom test functions.

That step would not be that far away since the Conatiner has a _specs property with the required path as key and the the cached Module as value.

Thoughts?

Start with the Container implementation, especially its _specs property, which the issue identifies as storing module paths and cached modules. Clarify the override API and expected behavior with maintainers before locating relevant tests; the work is done when the agreed module-mocking behavior is implemented and verified.

Written by the indexing model from the issue text.