What is the main difference between BDD and TDD?
If TDD is about designing a thing right, Behavior-Driven Development (BDD) is about designing the right thing. Like TDD, BDD starts with a test, but the key difference is that tests in BDD are scenarios describing how a system responds to user interaction.
While writing a BDD test, developers and testers are not interested in the technical details (how a feature works), rather in behavior (what the feature does). BDD tests are used to test and discover the features that bring the most value to users.
