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Testing cheat sheet & developer notes

Testing cheat sheet and 2 curated developer notes — core concepts, patterns, and interview prep. Maintained by the DevRecall team.

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01 · Testing

Testing Fundamentals & TDD

Testing Fundamentals & TDD. Test Pyramid. /\ / \ E2E Tests (few, slow, brittle) /----\ → Playwright, Cypress / \ → full user flows, critical paths /--------\ / \ Integration Tests (some) /------------\ → API routes, DB q…

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02 · Testing

Testing Interview Questions

Testing Interview Questions. What's the difference between unit, integration, and E2E tests? Unit: isolated functions/components with mocked deps. Integration: multiple units/layers together (API + DB). E2E: full user fl…

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Notes from developers

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Reactfrontend

Zustand

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Apr 2, 2026
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Concepts to know for Testing

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The Production Readiness ChecklistWhat a well-built app has in place, from a domain glossary to feature flags, error tracking and a changelog, and how it shifts by stage and for B2B vs B2C.Intermediate·15 min

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