UnitTest for https://github.com/symfony/symfony/issues/6498

gistfile1.php

<?php

/*
 * This file is part of the Symfony package. (c) Fabien Potencier <fabien@symfony.com> For the full copyright and license information, please view the LICENSE file that was distributed with this source code.
 */
namespace Symfony\Component\Yaml\Tests;

use Symfony\Component\Yaml\Yaml;
use Symfony\Component\Yaml\Parser;
use Symfony\Component\Yaml\Dumper;
use Symfony\Component\Yaml\Inline;

class Issue6498ConfirmationTest extends \PHPUnit_Framework_TestCase
{

    /**
     *
     * @var Parser
     */
    protected $parser;

    /**
     *
     * @var Dumper
     */
    protected $dumper;

    protected $path;

    protected function setUp()
    {
        $this->parser = new Parser();
        $this->dumper = new Dumper();
        $this->path = __DIR__ . '/Fixtures';
    }

    protected function tearDown()
    {
        $this->parser = null;
        $this->dumper = null;
        $this->path = null;
        $this->array = null;
    }
    
    /**
     * Create pairs of PHP variables and their YAML dumping with the Dumper
     */
    public function dataSourceAndDumper() {
        $source = array(
            'foo' => new C(),
            'bar' => 1
        );
        $this->dumper = new Dumper();
        $dumped = $this->dumper->dump($source, 0, 0, false, true);
        
        return array(
        	array('source' => $source, 'dumped' => $dumped)
        );
    }

    /**
     * @dataProvider dataSourceAndDumper
     */
    public function testConsistencyBetweenDumperAndParser($source, $dumped) {
        $parsed = $this->parser->parse($dumped, true, true);
        $this->assertEquals($source, $parsed, 'Dumping and Parsing is not restoring the original code');
    }
    
    /**
     * @dataProvider dataSourceAndDumper
     */
    public function testConfirmationIssue6498($source, $dumped)
    {
        try {
            $parsed = $this->parser->parse($dumped, true, true);
        } catch (\Exception $e) {
            error_log($e->getTraceAsString());
            throw $e;
        }
        
        $this->assertEquals($source, $parsed, 'Dumping and Parsing is not restoring the original code');
    }
    
}

class C
{
    public $a = 'foo';
}