* WIP on web plugin registry
* WIP on registering plugins
* WIP on web plugin registration
* Only generate `package:flutter_web_plugins` imports if plugins are
defined
* Add parsing test
* Add documentation
* Fix analyzer warnings
* add license headers
* Add tests for package:flutter_web_plugins
* Run `flutter update-packages --force-upgrade`
* Fix analyzer errors
* Fix analyzer error in test
* Update copyright and remove flutter SDK constraints
* Enable tests since engine has rolled
* add flutter_web_plugins tests to bots
* Create an empty .packages file for WebFs test
Flutter widget tests assert if a test completes with timers still
pending. However, it can be hard to diagnose where a pending timer
came from. For example, a widget might consume a third-party library
that internally uses a timer.
I added a FakeAsync.pendingTimersDebugInfo getter to quiver
(https://github.com/google/quiver-dart/pull/500). Make flutter_test
use it.
Additionally modify Flutter's debugPrintStack to take an optional
StackTrace argument instead of always printing StackTrace.current.
Fixes#4237.
In another change (#37646), I want to test that a test fails and
prints expected output. I didn't see an existing way to do that, so
I modified `_runFlutterTest` and `runCommand` to allow capturing the
output. Currently capturing and printing output are mutually
exclusive since we don't need both.
Some awkward bits:
* There already exists a `runAndGetStdout` function that is very
similar to `runCommand`, and this change makes the conceptual
distinction more confusing.
* `runFlutterTest` has multiple code paths for different
configurations. I don't understand what the different paths are
for, and I added output checking only along one of them.