Behavior Driven Development (BDD)

Behavior-Driven Development (BDD) is an Agile methodology that focuses on describing how a system should behave from the user’s perspective. It builds on Test-Driven Development but emphasizes collaboration between developers, testers, and business stakeholders. Requirements are written as scenarios using the Given–When–Then format, making them both human-readable and executable as automated tests. Tools like Cucumber, SpecFlow, and Behave translate these scenarios into test code. BDD improves communication, reduces misunderstandings, and ensures that features are aligned with real business needs while also serving as living documentation of system behavior.