Writing this is part of my own process in learning how to TDD a flask app, I haven't done more than just play with the framework until this point and am in no way an expert. The lack of decent information out there on how to do this is stagering, so hopefully my documenting this learning process will help others starting out.
Secondly, while this is supposed to be about TDD, this first article has no tests what-so-ever! There is a reason for that however, this is the very basic of basic Flask, getting the basic layout in place. Part 2 will jump into Users & Authentication -- with tests! or so is my hope. Comments, suggestions, and contributions are welcome.
My Blog posts relating to this project: http://waynesimmerson.ca/Article/learn-test-driven-development-flask-part-1