This might be the first time I disagree with him. But as someone who did automated testing for years- this I can't get behind. Tests are code and thoughtlessly accumulating tests can create huge burdens. Which ironically usually leads to people ignoring tests.https://twitter.com/fchollet/status/1273714126645161985 …
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You have to be careful to test the underlying behavior that you really care about, not just some detail about how it's implemented now. Otherwise it'll be harder to refactor later because you'll break tests without breaking functionality
