Tag: testing

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Flaky tests are poisoning your productivity

Picture of Trisha's face frowning and the title "Flaky Tests"

I freaking HATE flaky tests.

The first time I worked in an environment that had real Continuous Integration with Actual Automated Tests that Actually Ran, it was like... freedom. We literally got the green light that our new code was working as expected, and that any changes we made hadn't broken anything. And refactoring... before then, I don't think I had ever really refactored anything. Even a simple rename was fraught with danger, you never knew if reflection or some sort of odd log-file parsing was dependent upon specific class or method names. With a comprehensive suite of unit, acceptance and performance tests, we had this blissful safety net that would tell us "Everything Is OK" after we'd done simple or extensive refactoring.

Except.

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Christmas decorations teach me a lesson about troubleshooting

And now, after an absence of several weeks, you get to see how long it takes me to write some of these posts.

I was putting up the Christmas decorations one Saturday when my worst fear was realised1 - one of my three strings of lights was not working.

The first two went up fine. The third lit up when I plugged it in, and in less than a second went out. Curses. This is not what I wanted, this was supposed to be a short exercise in making my tiny little flat look festive.

So I set about the tedious task of starting from the end closest to the plug and replacing every bulb, one by one, with a spare one to see if it magically lit up again. When it doesn't, you take the spare back out and replace it with the original bulb. I remember my parents going through this ritual every Christmas, the tediousness of this activity is more memorable than the fleeting joy of shinies.

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