Bundle testing with container setUp - not mine

ContainerTestCase.php

<?php

require_once __DIR__.'/../../../../../../../app/AppKernel.php';

class ContainerTestCase extends WebTestCase {

    private $container;

    public function setUp() {
        $this->app = new \AppKernel('test', true);
        $this->app->boot();
        $this->container = $this->app->getContainer();
    }

}