nuzlocke-tracker/.beans/nuzlocke-tracker-iam7--unit-tests-for-services-layer.md

title, status, type, created_at, updated_at, parent

title	status	type	created_at	updated_at	parent
Unit tests for services layer	draft	task	2026-02-10T09:33:08Z	2026-02-10T09:33:08Z	nuzlocke-tracker-yzpb

Write unit tests for the business logic in backend/src/app/services/. Currently this is the families.py service which handles Pokemon evolution family resolution.

Checklist

• Test family resolution with simple linear evolution chains (e.g. A → B → C)
• Test family resolution with branching evolutions (e.g. Eevee)
• Test family resolution with region-specific evolutions
• Test edge cases: single-stage Pokemon, circular references (if possible), missing data

Notes

• services/families.py contains the core logic for resolving Pokemon evolution families
• These tests may need mock database sessions or in-memory data depending on how the service queries data
• If the service methods take a DB session, mock it; if they operate on data objects, pass test data directly