flutter-test

Run Flutter tests using `flutter test` to execute all tests in your project, or target specific files with `flutter test test/models/unit_test.dart`. The command validates your code and reports pass/fail status with detailed error messages for failures.

Test failure analysis extracts error messages and traces root causes from test output. Review the expanded error details to pinpoint which assertion failed, then propose fixes based on the stack trace and expected vs. actual values.

Yes, run `flutter test --coverage` to generate test coverage reports that identify which lines of code are exercised by your tests. Coverage reports highlight gaps in your test suite and guide you toward areas needing additional test cases.

Flutter test execution supports targeted test runs by file or pattern. Run specific test files directly with `flutter test path/to/test.dart` or use pattern matching to execute tests for modified components, reducing feedback time during iterative development.

Yes, Flutter testing is applicable to Flutter and Dart projects. The `flutter test` command with `--reporter=expanded` works across Dart codebases, whether they're mobile apps, packages, or backend services using the Dart language.

The `--reporter=expanded` flag provides detailed, line-by-line test output that makes failures easier to diagnose. Expanded reporting shows full context for each assertion, reducing debugging time compared to compact summary formats.