This guidepost aims to describe different testing methods or practices like Behavioral Driven Development (BDD), Test-Driven Development (TDD), and Acceptance Test-Driven Development (ATDD). It will also help clarify the key differences between these techniques. By the end of this article, one is expected to understand how each method works, its key differences, and its particular roles in the development process. First, let’s start with the difference between TDD and BDD and then move on to ATDD. www.browserstack.com/guide/tdd-vs-bdd-vs-atdd