public function onFirstRun(FirstRunEvent $event)
{
$units = $event->getUnits();
$this->output->writeln(sprintf(" %d tests executed (%d assertions)", sizeof($units->all()), $units->getNumOfAssertions()));
if ($units->getNumOfFailures() || $units->getNumOfErrors()) {
$this->output->writeln(sprintf('<error> Be careful, some tests fails ! There was %d failures and %d errors</error>', $units->getNumOfFailures(), $units->getNumOfErrors()));
} else {
$this->output->writeln(' <info>OK</info>');
}
}