The integration tests (testcontainers + mongo:7) exposed three real bugs:
1. deleteAllUserData filtered with bson.ObjectID on collections that store
user_id as a plain string (Account, Goal, Property, etc.) — none of them
were actually deleted. Fixed by using the original string userID for those
collections; only finance_sessions (AuthSession.UserID is ObjectID) keeps
the ObjectID filter.
2. consumeInvite correctly sets used_at, but the test was calling
getInviteByToken afterwards and expecting the invite back — that query
intentionally excludes used invites ($exists: false). Fixed the assertion
to check that the token is no longer redeemable (nil return = correct).
3. createEvent stored GoalItems as null when the slice was nil; subsequent
$push on a null field fails in MongoDB. Fixed by initialising GoalItems
to []EventGoal{} before insert so the field is always an array.
Combined unit + integration coverage: 64.7% → 79.8%
Co-authored-by: Gonçalo Rodrigues <guga@Goncalos-MacBook-Pro.local>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
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