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If Swift Package Manager is enabled, the tool generates a Swift package at `<ios/macos>/Flutter/ephemeral/Packages/FlutterGeneratedPluginSwiftPackage/`. This Swift package is how the tool adds plugins to the Flutter project. SwiftPM is strictly enforces platform versions: you cannot depend on a Swift package if its supported version is higher than your own. On iOS, we use the project's minimum deployment version for the generated Swift package. If a plugin has a higher requirement, you'll need to update your project's minimum deployment version. The generated Swift package is automatically updated the next time you run the tool. This updates macOS to do the same thing. Fixes https://github.com/flutter/flutter/issues/146204
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 VM and Flutter integration.
Use this command to run (from the flutter_tools directory):
../../bin/cache/dart-sdk/bin/dart run test test/integration.shard
You need to have downloaded the Dart SDK in your Flutter clone for this
to work. Running ../../bin/flutter will automatically download it.
Coverage exclusion
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.
Adding new test files
When adding a new test file make sure that it ends with _test.dart, or else it will not be run.