This directory contains tests for specific `flutter` commands.Tests that are self-contained unit tests should go in `hermetic/`.Tests that are more end-to-end, e.g. that involve actually runningsubprocesses, should go in `permeable/`.The `../../tool/coverage_tool.dart` script (which is used to collectcoverage for the tool) runs only the tests in the `hermetic` directorywhen collecting coverage.