Property-Based Testing
summary
Introduces property-based testing with concrete results: uses FSCheck (and Fast-check for JS) to run ~100 generated cases, finds real bugs and then shrinking reduces failures to minimal inputs. Shows specific properties like reverse twice equals original, tests randomness by reassembling removed items, verifies sort order pairwise, and checks serializer ↔ deserializer roundtrips. Reports corporate adoption (search found 74 then 129 references), notes tests run ~10–50x slower but still milliseconds, and demonstrates catching issues standard examples miss.
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chapters (5)
- 0:00Start
- 1:46Conclusion
- 24:29You have forward and reverse functions
- 28:03Property-based testing in the wild
- 37:23Are there any performance implications?
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