Property Based Testing for the Browser with Bombadil
summary
Open-source Bombadil runs property-based tests written in TypeScript/JavaScript against a real browser tests session, generating weighted random actions, capturing every DOM/console state and saving reproducible step logs (ran successfully against the conference agenda site). It detects violations like negative cart totals, lingering notifications and uncaught JS exceptions via extractors and actions, shows failures in Bombadil inspect, and promises shrinking to minimize repro steps; current limits: poor docs, no login handling, limited Windows binary.
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chapters (10)
- 0:00Bombadil and property testing intro
- 3:39Why traditional testing fails
- 7:47What is property-based testing
- 9:11Shopping cart example
- 11:38Live demo of Bombadil
- 16:20Installing Bombadil
- 19:51Extractors and actions in specs
- 21:38Adding Bombadil tests
- 23:26Bombadil roadmap and limits
- 25:54Q&A
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