Improve unit testing

[villChurch]

Currently only some endpoints have adequate unit testing.

Ideally each controller etc should have its own unit tests testing each of the endpoints.

Outstanding endpoints are

• [ ] AcnhEventsController
• [ ] AllController
• [ ] ArtworkController
• [ ] ConstructionController
• [ ] FencingController
• [ ] FishController
• [ ] FishPunController
• [ ] FossilController
• [ ] FurnitureController
• [ ] InsectController
• [ ] InsectPunController
• [ ] NhSeasonalController
• [ ] OutfitController
• [ ] ReactionController
• [ ] RedController - This controller will probably be deleted and replaced by ArtworkController though
• [ ] ShSeasonalController
• [ ] StatusController