Testing Stochastic Simulations: Bayesian Fuzzy Checking in Python
Abraham Flaxman
A hands-on guide to catching simulations bugs with automated tests
What you’ll learn: Write rigorous tests for randomized algorithms without arbitrary thresholds.
What you’ll get: A failing test that catches a subtle directional bias bug with Bayes factor = 10⁷⁹ (decisive evidence).
The approach: Run simulations many times, count outcomes, validate proportions using Bayesian hypothesis testing. The heart of this Fuzzy Checking Pattern is this...