Support debugging Flutter widget tests

It’d be nice to get https://github.com/flutter/flutter/blob/master/packages/flutter_tools/lib/src/commands/ide_config.dart to set up tasks.json such that when in a file that uses testWidgets from import package:flutter_test/flutter_test.dart, it could automatically invoke flutter test against that file and debug with breakpoints on cmd-shift-T.

[DanTup]

Ok, the way this works for now is:

When you hit F5 in a flutter project, if there is no program specified in your launch.json (or you don’t have one) and the active file is in the test folder, then it will be launched via flutter test. So, if you have a test file open and hit F5 it’ll run that, otherwise it’ll launch your app as usual.

I’m going to create a beta release of v2.11 in the next few days and would really appreciate some testing/feedback of this as there have been some significant changes to make it work (we now control which debug adapter is used and launch it in-process, whereas it used to be controlled by Code and launched in its own process).

[vogella]

Thanks @DanTup for this, every useful.