Making iOS Accessibility Testing Easy
Article Summary
Cash App's engineering team just open-sourced their solution to one of iOS development's most frustrating problems: testing accessibility without the manual grind.
Traditional accessibility testing on iOS is broken. Unit tests give false positives, UI tests don't reflect real user behavior, and manual testing is inconsistent. Cash App built AccessibilitySnapshot to fix this with snapshot testing principles.
Key Takeaways
- AccessibilitySnapshot generates visual snapshots showing exactly how VoiceOver reads your UI
- Catches accessibility regressions immediately in your existing test suite
- Supports Invert Colors and Dynamic Type, not just VoiceOver
- Open source framework requires just one line of code to implement
Cash App turned accessibility testing from a manual, time-consuming process into automated snapshot tests that catch regressions before they ship.
About This Article
iOS accessibility testing has real problems. Unit tests give false positives because accessibility depends on where views sit in the hierarchy. UI tests also interact with apps differently than actual users do, so they don't reliably measure real accessibility.
Nick Entin's team at Cash App built AccessibilitySnapshot. It applies snapshot testing to accessibility by creating visual snapshots that show accessibility elements and list descriptions in the order VoiceOver reads them.
The framework catches accessibility regressions in existing test suites right away. It speeds up iteration cycles because accessibility APIs can be confusing. Changing properties doesn't always give you the results you expect, and this tool cuts through that confusion.