What is TDD? “Test-driven development” refers to a style of programming in which three activities are tightly interwoven: coding, testing (in the form of writing unit tests), and design (in the form of refactoring).

TDD, or Test-Driven Development, is the process of writing and executing automated tests before writing code. Insights from the tests help the developer improve the code. TDD reflects the spirit of continuous feedback, resulting in faster bug identification and debugging.

Test-Driven Development (TDD) is a methodology in software development that focuses on an iterative development cycle where the emphasis is placed on writing test cases before the actual feature or function is written. TDD utilizes repetition of short development cycles. It combines building and testing.

Test-driven development (TDD), also called test-driven design, is a method of implementing software programming that interlaces unit testing, programming and refactoring on source code.

Test-driven development is the practice of writing tests prior to the code they will be testing. But not all developers agree with the method. Here, TDD practitioners discuss how they make it work for them.