waiting for all subtasks?

[emiltin]

How can I wait for a task and all it's subtasks? It sems calling wait() doesn't wait for subtasks:

Async do |t1|
  t1.async do |t2|
    t2.async do |t3|
      t3.sleep 1
      p :a
    end
  end.wait
  p :b
end

=>
:b
:a

[ioquatix]

#89

However it may be risky as you don't control all sub-tasks.

[emiltin]

Thanks. Since my need for this is in an RSpec testing context, the risk is minimal, so I don't mind simply iterating subtasks and waiting for them in turn.

[emiltin]

Task#stop seems to kill all sub tasks?

[ioquatix]

Yes that's correct. This is used by async-rspec gem if you want an example:

https://github.com/socketry/async-rspec/blob/66f0ac85218d087b7cc4a60736f2bf8d761acc76/lib/async/rspec/reactor.rb#L63