
Seems like each test had its own way of doing this. Extracted from https://github.com/flutter/flutter/pull/160443
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 running
subprocesses, should go in permeable/
.
The ../../tool/coverage_tool.dart
script (which is used to collect
coverage for the tool) runs only the tests in the hermetic
directory
when collecting coverage.