Flutter Tester

This is a comprehensive testing guide for Flutter projects that covers the full stack: unit tests, widget tests, integration tests, and Riverpod provider testing. It pushes a clear architecture where you test each layer in isolation using Given-When-Then structure, mock dependencies but never providers (override them instead), and always reset GetIt in tearDown. The reference tables are genuinely useful, especially the quick lookup for what to mock at each layer and common mistakes like forgetting to set screen size in widget tests or using Future.delayed instead of pumpAndSettle. If your Flutter codebase uses Riverpod and GetIt, this will save you from rewriting the same test setup patterns.