Is Agile different from TDD If so what are the main differences

Question

Is Agile really different from TDD ? If so what are the main differences ?

Answer 1

Yes, I'm going to be the devil's advocate and say. TDD and Agile are the same idea, albeit on a much smaller scale.

Please bear with me on this.

First and foremost, TDD pushes you to make a plan for what you want to accomplish before you do so. You don't consider how you're going to accomplish it. You simply consider how to show that what you're about to write is valuable, and you figure out how you know. In Agile techniques, this is quite similar to how projects are ideally sourced and requirements are gathered.

Then you do the bare minimum to gain feedback on your job. This is represented as a red or green bar in TDD. Agile techniques allow you to show off your work and obtain feedback from stakeholders, or (better yet) release it to production and see if it works and is used.

Then you figure out what the next task is and write the next section of the plan.

Estimation and prioritisation are used in agile approaches, although they are largely for allocating resources and determining whether the task is worth doing in the first place, which devs do naturally on a small scale.