File watcher with robo

robo_watcher.php

<?php

require_once './vendor/autoload.php';

/**
 * This is project's console commands configuration for Robo task runner.
 *
 * @see http://robo.li/
 */
class RoboFile extends \Robo\Tasks
{
    /**
     * Watch specific project files.
     * @return \Robo\Result
     */
    public function watchProject()
    {
        return $this->taskWatch()
            ->monitor(
                'src',
                function (\Lurker\Event\FilesystemEvent $fse) {
                    $this->io()->note((string)$fse->getResource());
                    $this->taskPhpUnit()->run();
                },
                \Lurker\Event\FilesystemEvent::DELETE
            )->run();
    }
}