Behavior Driven Development
In plain terms
Defining behavior in plain language before implementation.
Going deeper
BDD writes expected behavior as human-readable scenarios shared by developers, testers, and business, then automates them as tests. It aligns understanding before coding.
Under the hood
Given-When-Then (Gherkin) scenarios become executable specs; extends TDD toward collaboration.
Examples
Cucumber, Gherkin, given-when-then, executable specs, SpecFlow.
Think of it like...
Like agreeing on a detailed story of what should happen before building it.