Posts tagged TDD

Applying BDD & TDD in legacy



As I described in Introducing BDD & TDD, understanding the common goals of Behavior & Test Driven Development and defining your specific needs is the first and most critical step to start using this essential discipline.
Whenever the goal is to use new tools, it is simple: purchase them, shop for some hands-on training, and you are done.

Our ambition is different: we want to become Agile and Lean.
Then, it depends on the starting point too. B&TDD in greenfield development is relatively simple: start writing your tests and code!

However, starting with B&TDD in (Modern) Embedded Software can be more challenging due to the existing and often extensive codebase that was developed before the emergence of B&TDD.
Then, the question ‘How to start?’ is more like ’How to get out of the waterfall?’

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Introducing BDD & TDD



Is Behavior & Test Driven Development an essential aspect of professional software engineering? Leaders such as #UncleBob compare it to ‘double entry bookkeeping’: a crucial discipline. He claims that when our industry doesn’t professionalize quickly, we have the risk that B&TDD will be enforced by law (too).
So, it can be wise to learn to practice it quickly.

It is not easy to start when writing (long-lasting) embedded systems. We have other demands, codebases with a lot of history. Still, we can (& should).
And we have an advantage, our Typically engineers are clever: When they understand the objectives, they will find a solution; that is their job!

Updated on 2020/07/15

This old article was never really published. As it fits my new MESS blogs, I reworked and posted it again. This is part-I; I expect other parts coming weeks.

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dPID: A Python ‘homework’ exercise


1 hour

This is an optional exercise for the python-3 workshops: program a discrete PID-controller.

A basic class definition is given; which has to be tested and implemented. By starting with the test-part, which is advisable anyhow (the TDD approach), the exercise starts simple.

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