public function testShell()
{
$jobby = new Jobby();
$jobby->add('HelloWorldShell', ['command' => 'php ' . __DIR__ . '/_files/helloworld.php', 'schedule' => '* * * * *', 'output' => $this->logFile]);
$jobby->run();
// Job runs asynchronously, so wait a bit
sleep($this->getSleepTime());
$this->assertEquals('Hello World!', $this->getLogContent());
}