Tag
All Nuvika Blog posts tagged “Testing”.
Engineering
A test suite that passed, then failed, then passed — because OneDrive kept syncing node_modules mid-import. How to tell environmental flakes from real bugs, and the vitest flags that fixed it.
Engineering
One line — sys.modules['boto3'] = MagicMock() — at module level poisoned 3,000 tests across the whole pytest session. Why order-dependent failures are haunted, not flaky.
Engineering
A query that worked on PostgreSQL detonated on SQLite with 'str' object has no attribute 'hex'. Why the strict test database did us a favor, and converting types at the boundary.
AI
How we used Claude Code to implement, review, and verify a complete feature end-to-end — TDD, subagent-driven development, two-stage code review. What worked, what surprised us.