What is Test-Driven Development?

Test-driven development (TDD) is a software development process that follows a short, repetitive, and continuous cycle of creating unique test cases for what companies want in their web or mobile application, then writing code to actually produce it with quality. Test-driven development differs from traditional QA testing because very specific test cases are written first based on what companies want to see in their application, then, the engineers write code with the goal of making that initial test pass.