### What needs to get done Add support for the testing service in Charmcraft. Determine the best strategy to test multi-platform artefacts: this is different from snapcraft where a single artifact is tested in multiple systems, in Charmcraft each artefact is tested on a single system and possibly a single testing run must happen after all artefacts are generated. This task may involve refactoring of the testing infrastructure in craft-application to accomodate special needs of multi-platform testing. ### Why it needs to get done Charmcraft testing support is long overdue. Previous testing experiments were not approved and must be replaced with this new design.