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Adam Kennedy > Test-POE-Stopping-1.09 > Test::POE::Stopping



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Test::POE::Stopping - Test if a POE process has nothing left to do


POE is a curious beast, as most asynchronous environments are.

But in regards to testing, one of the more interesting (and when it's not working properly, annoying) situations is how to tell if the POE-controlled process will, or has, stopped.

The obvious solution is to just say something like

  pass( "POE stopped" );

But this isn't really useful to us, because this test never fails, it just deadlocks forever if some event generator is left around.

Test::POE::Stopped takes an introspective method in determining this.

In your test script, a top level controlling session should be set up.

In this session, you should set a delayed alarm, that SHOULD fire after everything is finished, and POE should have naturally stopped.

The delayed alarm will keep POE from returning, but it should make the alarm the very last event called.

In this event you call the poe_stopping function, which will examine the running POE::Kernel to see if it displays the characteristics of one with the last event in progress (no other sessions, empty queue, no event generators, etc).

If POE is not stopping, then the poe_stopping function will emit a fail result and then do a hard-stop of the POE kernel so that at least your test script ends.



The poe_stopping test checks the kernel to see if, after the current event, the POE kernel will have nothing else left to do and so will stop.


All bugs should be filed via the bug tracker at

For other issues, or commercial enhancement and support, contact the author


Adam Kennedy <>




Copyright 2006 - 2011 Adam Kennedy.

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

The full text of the license can be found in the LICENSE file included with this module.

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