public function testExecute()
{
$application = $this->getApplication();
$application->add(new ListCommand());
$command = $this->getApplication()->find('dev:module:observer:list');
$commandTester = new CommandTester($command);
$commandTester->execute(array('command' => $command->getName(), 'type' => 'global'));
$this->assertContains('controller_front_init_routers', $commandTester->getDisplay());
}