[2.x] Support for panther

[Martin Århof]

Describe the solution you'd like
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Have two classes you can extend

use Liip\FunctionalTestBundle\Test\WebTestCase;
use Liip\FunctionalTestBundle\Test\PantherTestCase;

Where PantherTestCase extends Symfony\Component\Panther\PantherTestCase

Another possible solution could be

Make a static::createPantherClient();

Which have the same funcionality as https://github.com/liip/LiipFunctionalTestBundle/blob/master/Test/WebTestCase.php#L776

Though, as of symfony 4.1 you should use self::$container instead of $client->getContainer() (https://symfony.com/doc/current/testing.html#accessing-the-container)

[Alexis Lefebvre]

Panther provides a trait for using it with this bundle: https://github.com/symfony/panther#usage-with-other-testing-tools

Does it fit your needs?

[Martin Århof]

Sure it works as expected with the trait, sorry about that.