A helper method to save Symfony Client content to an html file and immediately open the page on your browser

WebTestCase.php

<?php

namespace MyNamespace\CoreBundle\Test;

use Symfony\Bundle\FrameworkBundle\Client;
use Symfony\Bundle\FrameworkBundle\Test\WebTestCase as SymfonyWebTestCase;
use Symfony\Component\Process\Process;

abstract class WebTestCase extends SymfonyWebTestCase
{
    public function saveOutput(Client $client, $path = null, $domain = null, $browser = 'firefox')
    {
        if (is_null($path)) {
            $path = "/../../../../web/test_out.html";
        }

        file_put_contents(__DIR__ . $path, $client->getResponse()->getContent());

        if (!is_null($domain)) {
            $process = new Process($browser . ' "'.$domain.'/test_out.html"');
            $process->run();
        }
    }
}

WebTestCase2.php

<?php

namespace MyNamespace\CoreBundle\Test;

use Symfony\Bundle\FrameworkBundle\Client;
use Symfony\Bundle\FrameworkBundle\Test\WebTestCase as SymfonyWebTestCase;
use Symfony\Component\Process\Process;

abstract class WebTestCase extends SymfonyWebTestCase
{
    public function saveOutput(Client $client, $path = null, $domain = null, $delete = true, $browser = 'firefox')
    {
        if (is_null($path) || '' == $path) {
            $path = "/../../../../web/test_out.html";
        }

        file_put_contents(__DIR__ . $path, $client->getResponse()->getContent());

        if (!is_null($domain)) {
            $process = new Process($browser . ' "'.$domain.'/test_out.html"');
            $process->start();
            sleep(1);

            if ($delete) {
                unlink(__DIR__ . $path);
            }
        }
    }
}

WebTestCase3.php

<?php

namespace MyNamespace\CoreBundle\Test;

use Symfony\Bundle\FrameworkBundle\Client;
use Symfony\Bundle\FrameworkBundle\Test\WebTestCase as SymfonyWebTestCase;
use Symfony\Component\Process\Process;

abstract class WebTestCase extends SymfonyWebTestCase
{
    public function saveOutput(Client $client, $path = null, $domain = null, $delete = true, $browser = 'firefox')
    {
        if (is_null($path) || '' == $path) {
            $path = "/../../../../web/test_out.html";
        }

        file_put_contents(__DIR__ . $path, $client->getResponse()->getContent());

        if (!is_null($domain)) {
            $process = new Process($browser . ' "'.$domain.'/test_out.html"');
            $process->run(function() use($path, $delete) {
                if ($delete) {
                    unlink(__DIR__ . $path);
                }
            });
        }
    }
}