Test Quality Auditor

I have audited src/auth/service.spec.ts and the associated CI configuration. While the coverage is technically 92%, the suite has significant structural weaknesses that would allow authentication bypasses to reach production.

Test Quality Review — src/auth/service.spec.ts

Summary

The current suite provides false confidence. Most tests assert that the mock functions were called rather than verifying the resulting state or token validity, meaning the logic could be completely broken while the tests remain green.

False confidence

[src/auth/service.spec.ts:45] Mocking the verifyPassword function to always return true within the test setup. This would still pass if the actual database comparison logic was deleted.
Fix: Use a test database instance or a narrower mock that requires a valid hash match.

[src/auth/service.spec.ts:89] Tautological assertion: expect(result).toBeDefined(). This passes even if the service returns an error object instead of a valid session.
Fix: Assert on specific properties of the session object, such as result.userId and a valid JWT structure.

Flaky / Blind spot

[src/auth/service.spec.ts:112] Blind spot: No tests exist for the account lockout mechanism after five failed attempts. A regression in the rate-limiter would not be caught.

[src/auth/service.spec.ts:150] Flaky: Test uses new Date() to check token expiration. This will fail intermittently in CI depending on execution lag.
Fix: Use a fixed seed or mock the system clock.

Not enforced

[.github/workflows/ci.yml:22] The auth test job uses continue-on-error: true. Failures in this specific suite do not currently block the merge pipeline.

Next steps

1. Remove continue-on-error from the CI workflow to ensure failures are blockers.
2. Refactor the verifyPassword mock to validate input against a set of known test hashes.
3. Replace generic toBeDefined() checks with schema-based assertions for the session response.