iOS Application Testing Strategies at Shopify
Article Summary
Shopify's iOS team ships hundreds of commits weekly to a monorepo. Their testing strategy keeps quality high without slowing down velocity.
Uzziah Eyee from Shopify's engineering team breaks down their comprehensive iOS testing approach. The article uses a car-building analogy to explain how different test types work together across the application stack.
Key Takeaways
- Unit tests verify Models and ViewModels handle business logic correctly
- Snapshot tests catch visual regressions in Views and ViewControllers
- XCUITest automation validates complete user workflows like login and checkout
- Test pyramid principle: many fast unit tests, fewer slower UI tests
- UI automation tests improve accessibility by requiring proper labels
Critical Insight
Testing at every layer (Models, Views, ViewModels, ViewControllers, Flows) enables frequent releases while maintaining quality in a fast-paced monorepo environment.
