A Jenga tower with some blocks labeled 'Tests' being pulled out
Test-Driven Development (TDD) doesn’t make sense to me, especially when requirements change frequently.

In TDD, the idea is to write tests before the actual code, allowing for a cycle of development where the tests guide implementation. But when requirements are always shifting, I never find a point in the development cycle where TDD feels useful.

When I develop a feature, I usually follow these steps:

  1. Make it work: a mandatory, crappy implementation that gets the job done.
  2. Make it right: a nice-to-have step, improving code maintainability and reusability.
  3. Make it fast: by this point, I’m already moving on to the next class or method, driven by the need for speed.

When it’s time to re-assess my work, that’s when I optimize for speed and write tests.

At each of these stages, TDD creates friction. And I don’t like friction. While tests add a valuable layer of assurance, they can also slow you down. The smoother the workflow, the happier we are.

In theory, you should write tests that don’t depend on your implementation, allowing you to write the test once and change your implementation as needed.

That’s supposed to reduce friction, right?

However, in my practice, this is challenging. You end up thinking about abstractions instead of being productive and pushing out more customer-facing code. Instead of focusing on delivering features, I find myself entangled in a web of test cases and mock objects.

So, this leads to more friction instead.

I’ve tried TDD and have tested my code religiously before. Yet, I discovered that I spent more time in the _test or _spec files than in the files that actually implement a feature. It feels like running a marathon, only to find you’ve been looping around the same track.

What many TDD proponents overlook is that tests can contribute to technical debt as well. The more tests you write, the more code you need to maintain.

If you feel compelled to write a test every time you change a line, you could end up managing an Everest of tests - mountains of code that require as much care and attention as the features themselves.

Ultimately, while TDD might work in stable environments, I prefer a more flexible approach to keep my workflow agile and responsive.

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