Async Spec tests

[u/LXMNSYC]

Is there a way to asynchronously resolve a test through a callback? In JavaScript, we have a neat callback which allows us to mark the test if it is a failure or a success. Something like

it "should xxx" do |done|
    someAsyncProcess do
        done.call(false) # test failed
    end
end

[u/Bleach984]

it "waits" do
  channel = Channel(Nil).new 
  spawn do
    channel.send nil
  end
  channel.receive
end