Edit: UriSafeTokenGeneratorTest.php

Editing: UriSafeTokenGeneratorTest.php

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<?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\Security\Csrf\Tests\TokenGenerator;

use Symfony\Component\Security\Csrf\TokenGenerator\UriSafeTokenGenerator;

/**
 * @author Bernhard Schussek <bschussek@gmail.com>
 */
class UriSafeTokenGeneratorTest extends \PHPUnit_Framework_TestCase
{
    const ENTROPY = 1000;

/**
     * A non alpha-numeric byte string
     * @var string
     */
    private static $bytes;

/**
     * @var \PHPUnit_Framework_MockObject_MockObject
     */
    private $random;

/**
     * @var UriSafeTokenGenerator
     */
    private $generator;

public static function setUpBeforeClass()
    {
        self::$bytes = base64_decode('aMf+Tct/RLn2WQ==');
    }

protected function setUp()
    {
        $this->random = $this->getMock('Symfony\Component\Security\Core\Util\SecureRandomInterface');
        $this->generator = new UriSafeTokenGenerator($this->random, self::ENTROPY);
    }

protected function tearDown()
    {
        $this->random = null;
        $this->generator = null;
    }

public function testGenerateToken()
    {
        $this->random->expects($this->once())
            ->method('nextBytes')
            ->with(self::ENTROPY/8)
            ->will($this->returnValue(self::$bytes));

$token = $this->generator->generateToken();

$this->assertTrue(ctype_print($token), 'is printable');
        $this->assertStringNotMatchesFormat('%S+%S', $token, 'is URI safe');
        $this->assertStringNotMatchesFormat('%S/%S', $token, 'is URI safe');
        $this->assertStringNotMatchesFormat('%S=%S', $token, 'is URI safe');
    }
}