c6dce2318b
The embedder requires that the isolate is unpaused, because the runInView method requires interaction with dart engine APIs that are not thread-safe. These APIs must be run on the same thread that would be blocked by the pause. Simply unpausing is not sufficient, because this does not prevent the isolate from immediately hitting a breakpoint, for example if the breakpoint was placed in a loop or in a frequently called method. Instead, all breakpoints are first disabled and then the isolate resumed.
Flutter Tools
This section of the Flutter repository contains the command line developer tools for building Flutter applications.
Working on Flutter Tools
Be sure to follow the instructions on CONTRIBUTING.md to set up your development environment. Further, familiarize yourself with the style guide, which we follow.
Setting up
First, ensure that the Dart SDK and other necessary artifacts are available by invoking the Flutter Tools wrapper script. In this directory run:
$ ../../bin/flutter --version
Running the Tool
To run Flutter Tools from source, in this directory run:
$ ../../bin/cache/dart-sdk/bin/dart bin/flutter_tools.dart
followed by command-line arguments, as usual.
Running the analyzer
To run the analyzer on Flutter Tools, in this directory run:
$ ../../bin/flutter analyze
Writing tests
As with other parts of the Flutter repository, all changes in behavior must be
tested.
Tests live under the test/ subdirectory.
- Hermetic unit tests of tool internals go under
test/general.shard. - Tests of tool commands go under
test/commands.shard. Hermetic tests go under itshermetic/subdirectory. Non-hermetic tests go under itspermeablesub-directory. - Integration tests (e.g. tests that run the tool in a subprocess) go under
test/integration.shard.
In general, the tests for the code in a file called file.dart should go in a
file called file_test.dart in the subdirectory that matches the behavior of
the test.
We measure test coverage post-submit. A change that deletes code might decrease test coverage, however, most changes that add new code should aim to increase coverage. In particular, the coverage of the diff should be close to the average coverage, and should ideally be better.
Running the tests
To run the tests in the test/ directory, first ensure that there are no
connected devices. Then, in this directory run:
$ ../../bin/cache/dart-sdk/bin/pub run test
The tests in test/integration.shard are slower to run than the tests in
test/general.shard. To run only the tests in test/general.shard, in this
directory run:
$ ../../bin/cache/dart-sdk/bin/pub run test test/general.shard
To run the tests in a specific file, run:
$ ../../bin/cache/dart-sdk/bin/pub run test test/general.shard/utils_test.dart
Forcing snapshot regeneration
To force the Flutter Tools snapshot to be regenerated, delete the following files:
$ rm ../../bin/cache/flutter_tools.stamp ../../bin/cache/flutter_tools.snapshot