
https://github.com/flutter/flutter/pull/150645 tries to shut down Chrome by sending a browser close command through a debug protocol. The webkit_inspection_protocol library used to send the command may throw a SocketException if Chrome has already been shut down.
Web integration tests
These tests are not hermetic, and use the actual Flutter SDK. While
they don't require actual devices, they run flutter_tester
to test
Dart web debug services (dwds) and Flutter integration.
Use this command to run (from the flutter_tools
directory):
../../bin/cache/dart-sdk/bin/dart run test test/web.shard
These tests are expensive to run and do not give meaningful coverage information for the flutter tool (since they are black-box tests that run the tool as a subprocess, rather than being unit tests). For this reason, they are in a separate shard when running on continuous integration and are not run when calculating coverage.