End-to-end Testing Is Hard - But It Doesn't Have to Be
summary
Cypress.io is an open-source MIT end-to-end runner that runs inside an iframe so tests execute in the browser next to the app, exposing a time‑traveling debugger and the app's globals. Every command has command retries with per-command timeouts to eliminate flake. Tests call back into Node via site tasks to inspect databases or start services. The execution model is a queued reactive stream which is why there is no async/await.
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