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Test automation is about preventing bugs, sure. And TDD is about software design. I don't disagree.

However, unit testing is also a nice way to find bugs. In any case, "trapping" a bug like I did in this article is often an effective way of introducing newcomers to what a unit test is.

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It was a good article. And using automated tests to trap and isolate problems is an important technique.

I didn't mean my nit-picking to come across as harsh and dismissive. I just get hung up on people talking about writing tests to find bugs, because if that's all it is about, manual testing is generally faster in the short-run.

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