Remembering a TDD exercise from years ago and how just doing TDD was key to it becoming ingrained into my workflow, I thought it might be good to run a variation of it this year. Especially since other developers at PhoneBurner seemed interested.

If the 12 TDDs have started, take a look at the day directories in this branch. To participate simply fork the repository and create your own branch. When a new challenge is released a git rebase 2021 should get your local copy all up to date.

Each day will have a README documenting the exercise, and may include test input / expected output. You should be able to complete the exercise using any language and testing framework, the exercise resources will be language agnostic.

There will be a new challenge every weekday starting December 6th and ending December 21st (12 days, right?). The first week will focus on what may seem like simple code challenges. The second week will focus on refactoring using TDD.

Not many, that's for sure. Since these are TDD exercises you should start the solution by writing a test, then writing the code that makes the test pass. And then maybe a refactor or two to improve the solution, leveraging the tests to ensure the refactoring doesn't change the behavior.

And once you have a solution, share it! Tweet a link to your solution using #12TDDs, or share it with someone else you know participating. Each day will have a discussion thread in 'General', but feel free to start threads about your solution in 'Show and Tell'.

And that's it. No pressure, just an excuse to take some time and improve your TDD process.

• Dec 6th (Day 1)
• Dec 7th (Day 2)
• Dec 8th (Day 3)
• Dec 9th (Day 4)
• Dec 10th (Day 5)
• Dec 13th (Day 6)
• Dec 14th (Day 7)
• Dec 15th (Day 8)
• Dec 16th (Day 9)
• Dec 17th (Day 10)
• Dec 21st (Day 11)
• Dec 22nd (Day 11)