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TESTS ENABLE CHANGE!
Unit tests are about facilitating change! Yes, tests find errors in the code, and it is nice to know that your code is working when you have delivered. But that is just a fraction of the benefits you get from tests. The biggie is that you can change your code and still be certain that it does what it’s supposed to do. Code is always evolving. From the first line you write, and never stops. And I don’t just mean that you refactor your functions. That too, obviously, but all the way up to really changing the code, breaking it up and repurposing it totally by reusing what you have,…
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ARE INTEGRATION TESTS REALLY THE BEST WAY?
Do you write integration tests? Do you enjoy doing it? No? Thought so, me neither. Integration tests are inherently more complex than unit tests. They have to be, they test so much more than just that single piece of functionality that a unit test does. Setup is more demanding because there are more execution paths to consider reaching the goal of the test. And that is also one of the major problems with them. To have confidence that they don’t let bugs through you need coverage. And that takes effort. As soon as you start combining things complexity rise and that means more tests. The thing is, combining objects gives…
