Dart Test Coverage

Guidelines for running and interpreting test coverage in Dart packages.

When to use this skill

• When asked to "check test coverage" or "improve coverage".
• When you need to identify which parts of a library are untested.

Discovery

To find areas lacking test coverage:

Run Coverage Analysis

Follow the workflow to generate and interpret coverage data:

1. Run Tests with Coverage: dart test --coverage=.dart_tool/coverage
2. Interpret Results: Use the script or format_coverage as described in the Interpreting Results section to identify specific files and missed lines.