Write a comprehensive test suite for a Flutter authentication module that includes unit tests, widget tests, and integration tests. Include error scenarios and edge cases.
Flutter 3.29.2 • channel stable • https://github.com/flutter/flutter.git
Framework • revision c236373904 (7 weeks ago) • 2025-03-13 16:17:06 -0400
Engine • revision 18b71d647a
Tools • Dart 3.7.2 • DevTools 2.42.3