To allow tests to begin migrating to null safety, sound null safety needs to be disabled. Also removes the experiment flag that is unnecessary since the framework is on the SDK allowlist.
Like Android/iOS, only enable --null-assertions if asked. Previously this was enabled by default for web, but in general this has proved to be too breaking to enable by default.
#61042
There are some occasional difficult to repro flakes on the tool integration tests. Try running only a single isolate to simplify the environment a bit.
Enable null safety asserts for web debug mode. This induces runtime asserts at the boundaries between null safe and non-null safe libraries. Adds integration test that validates assertion error is thrown.
#61042
Use tester (disclaimer, written by me) to unit test the flutter tools general shard. Since these tests are designed to be hermetic, the single compilation/single isolate model offers a tremendous speedup over the default pub run test workflow. On previous linux shard, test execution alone took 10:30, while now it takes only 1:30.
Ensure that the language version of the test/web generated entrypoint matches the language version of the test file to run, or the overall package language version if no annotation is provided.
Also combines experiments into extraGenSnapshot/ExtraFrontEndOptions. Allows providing --no-sound-null-safety to allow out of order migration and running.
Ensure iOS and android builds can be correctly cached. Use the performance-measurement-file to verify that all targets were skipped on the second invocation. This is only run on the flutter_gallery build.
* Fix web test flakiness; enable web golden tests
The fix is three-part:
- Only allow one test to load _and_ test at any point in time.
- Use a fresh Chrome instance for each test file.
- Increase Cirrus resources.
The first two changes only fix the "Unknown error loading" error, but not hanging tests. The resource increase also prevents hanging tests.
Other minor changes:
- Remove test batching (it's no longer necessary)
- Fix the Chrome class, which was using the wrong Completer.
Move Flutter Gallery to dev/integration_tests/ as it is an older copy used only for testing. The current version of the Flutter Gallery now lives in https://github.com/flutter/gallery.
