Testing & Debugging

Test generation and debugging utilities

Testing tools speed up the writing-tests-for-existing-code phase that everyone tries to skip: Jest snapshot generators from sample data, Playwright selector explainers, mock-data generators that respect a TS type, regex-tester for the patterns inside your test assertions, faker.js seed generators. Plus debugging helpers — stack-trace deobfuscators that read sourcemaps, JSON diff visualizers that highlight the field that changed, latency calculators for retry-with-backoff strategies. Useful both when you're ramping coverage on an existing codebase and when you're hunting down a flaky test's root cause.