Software Testing Resources and Guides

Testing is what lets teams ship with confidence. This hub gathers guides on unit, integration, and end-to-end testing, test-driven development, and the tools and practices that catch bugs before users do.

14 articles · Updated March 18, 2026

Test behavior, not implementation. Tests that break every time you refactor are testing the wrong thing.

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What's the difference between unit, integration, and E2E tests?▾

Unit tests check a single function or component in isolation, integration tests verify that pieces work together, and end-to-end tests exercise the whole app like a real user. A healthy suite has many fast unit tests and fewer, higher-level tests.

What is test-driven development (TDD)?▾

TDD is a workflow where you write a failing test first, write just enough code to pass it, then refactor. It keeps code testable and focused, and gives you a safety net as the design evolves.

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