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As we learned in the previous article, we can implement simple checking directly in our exercise if we don't want to build a check.
However, Self Checking is rather un-flexible in that you can only hook in to the verify/run process at one particular point, immediately after all other checks have run.
We also described the events features in previous chapters Events & Creating Listener Checks. Well, as it goes, any events you can listen to in Listener Checks, you can listen to directly in your exercises!
Check it out:
<?php
class MyExercise extends AbstractExercise implements ExerciseInterface
{
...snip
/**
* @param ExerciseDispatcher $dispatcher
*/
public function configure(ExerciseDispatcher $dispatcher)
{
$dispatcher->requireCheck(ComposerCheck::class);
$dispatcher->getEventDispatcher()->listen('verify.start', function (Event $e) {
//do something
});
}
}
You can grab the EventDispatcher from ExerciseDispatcher and listen to any events and
insert verifiers just like we did in
Creating Listener Checks when we inserted a verifier
function which verifies the state of a Couch DB database.
You can listen to any of the events listed on Events.