flutter-testing

Overview

Per flutter-testing-doc:

"Flutter uses a testing pyramid approach with three main categories":

1. Unit Tests - single function / method / class; mocked dependencies; quick.
2. Widget Tests - single widget; UI + lifecycle + interactions; quick.
3. Integration Tests - full app or large sections; on real devices/emulators; highest confidence; slowest.

The framework ships first-party tooling for all three layers.