Test‑Driven Development and Behavior‑Driven Development
Test‑Driven Development and Behavior‑Driven Development Test‑Driven Development (TDD) and Behavior‑Driven Development (BDD) help teams build reliable software. In TDD, a developer writes a failing unit test first, then writes the minimum code to pass, and finally refactors. In BDD, the team writes scenarios in plain language to describe how the software should behave, helping both developers and non‑technical stakeholders stay aligned. Key differences include focus and scope. TDD targets internal behavior and code design, while BDD targets external behavior and user value. TDD tests are small, fast, and isolated. BDD tests read like stories and emphasize outcomes, such as features and user goals. Both methods encourage small, verifiable steps and clear expectations. ...