public function testItCanCleanMultipleCaches()
{
$application = $this->getApplication();
$application->add(new CleanCommand());
$command = $this->getApplication()->find('cache:clean');
$commandTester = new CommandTester($command);
$commandTester->execute(array('command' => $command->getName(), 'type' => array('config', 'layout')));
$display = $commandTester->getDisplay();
$this->assertContains('Cache config cleaned', $display);
$this->assertContains('Cache layout cleaned', $display);
}