public function testExecute()
{
$command = $this->getApplication()->find('list');
$commandTester = new CommandTester($command);
$commandTester->execute(array('command' => 'list'));
$this->assertContains(sprintf('n98-magerun version %s by netz98 GmbH', $this->getApplication()->getVersion()), $commandTester->getDisplay());
}