Hypothesis Works

Hypothesis is the property-based testing library for Python. With Hypothesis, you write tests which should pass for all inputs in whatever range you describe, and let Hypothesis randomly choose which of those inputs to check - including edge cases you might not have thought about. For example:

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What is property-based testing? (2016)

2021106 points68 commentscited by 4Software Engineering details

I get asked this a lot, and I write property based testing tools for a living, so you'd think I have a good answer to this, but historically I haven't. This is my attempt to fix that.