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Discussion on: Tell us about a time when your tests saved you

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Avalander

We were using a statistics library developed by another team in the company. Since that other team couldn't be bothered to write tests, we had an extensive integration test suite on that library (that's about all the tests we had, our project manager and architect thought we shouldn't bother to test our own code, but that is a story for another time). Every time they released an update on that library, we would discover half a dozen breaking changes thanks to our integration tests.