Symfony2 Command Testing

So in the [symfony2 docs](http://symfony.com/doc/master/cookbook/console/console_command.html#testing-commands) it says how to test a command, but never says how to get mock or create a kernel. Here’s the code you that may help you out.

use Symfony\Component\Console\Tester\CommandTester;
use Symfony\Bundle\FrameworkBundle\Console\Application;
use Symfony\Bundle\FrameworkBundle\Test\WebTestCase;
use Acme\DemoBundle\Command\GreetCommand;

class ListCommandTest extends WebTestCase
{
public function testExecute()
{
$kernel = self::createKernel();
$kernel->boot();

$application = new Application($kernel);
$application->add(new GreetCommand());

$command = $application->find(‘demo:greet’);
$commandTester = new CommandTester($command);
$commandTester->execute(array(‘command’ => $command->getName()));

$this->assertRegExp(‘/…/’, $commandTester->getDisplay());

// …
}
}

Take note that we are now extending `Symfony\Bundle\FrameworkBundle\Test\WebTestCase` and added two lines of code to set the `$kernel` variable.

### References and Resources

* https://github.com/symfony/FrameworkBundle
* http://symfony.com/doc/current/cookbook/console/console_command.html#testing-commands