Quickstrom: Specifying and Testing Web Applications

on YouTube ↗36m

" summary

Quickstrom is a browser-testing engine that explores the DOM via WebDriver, running PureScript-like specs with LTL operators next always until and DOM queries query/queryAll to record traces of states and actions. It finds invalid behaviors in TodoMVC: 37 apps pass, 12 fail, 4 are untestable. Implementation uses a Haskell interpreter, supports Chrome/Firefox, records trailing state changes for async flows, and offers optional shrinking (disabled when nondeterminism makes repros unreliable).

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" chapters (6)

1. 0:00Start
2. 15:15THE TODOMVC SHOWDOWN
3. 16:51SPECIFICATION LANGUAGE
4. 22:28SPECIFICATION STRUCTURE
5. 24:57TEST FAILURES
6. 25:54TRAILING STATE CHANGES

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