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<?php

/*
 * This file is part of Twig.
 *
 * (c) Fabien Potencier
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

require_once dirname(dirname(__FILE__)).'/FilesystemHelper.php';

class Twig_Tests_Cache_FilesystemTest extends \PHPUnit\Framework\TestCase
{
    private $classname;
    private $directory;
    private $cache;

protected function setUp()
    {
        $nonce = hash('sha256', uniqid(mt_rand(), true));
        $this->classname = '__Twig_Tests_Cache_FilesystemTest_Template_'.$nonce;
        $this->directory = sys_get_temp_dir().'/twig-test';
        $this->cache = new Twig_Cache_Filesystem($this->directory);
    }

protected function tearDown()
    {
        if (file_exists($this->directory)) {
            Twig_Tests_FilesystemHelper::removeDir($this->directory);
        }
    }

public function testLoad()
    {
        $key = $this->directory.'/cache/cachefile.php';

$dir = dirname($key);
        @mkdir($dir, 0777, true);
        $this->assertTrue(is_dir($dir));
        $this->assertFalse(class_exists($this->classname, false));

$content = $this->generateSource();
        file_put_contents($key, $content);

$this->cache->load($key);

$this->assertTrue(class_exists($this->classname, false));
    }

public function testLoadMissing()
    {
        $key = $this->directory.'/cache/cachefile.php';

$this->assertFalse(class_exists($this->classname, false));

$this->cache->load($key);

$this->assertFalse(class_exists($this->classname, false));
    }

public function testWrite()
    {
        $key = $this->directory.'/cache/cachefile.php';
        $content = $this->generateSource();

$this->assertFileNotExists($key);
        $this->assertFileNotExists($this->directory);

$this->cache->write($key, $content);

$this->assertFileExists($this->directory);
        $this->assertFileExists($key);
        $this->assertSame(file_get_contents($key), $content);
    }

/**
     * @expectedException RuntimeException
     * @expectedExceptionMessage Unable to create the cache directory
     */
    public function testWriteFailMkdir()
    {
        if (defined('PHP_WINDOWS_VERSION_BUILD')) {
            $this->markTestSkipped('Read-only directories not possible on Windows.');
        }

$key = $this->directory.'/cache/cachefile.php';
        $content = $this->generateSource();

$this->assertFileNotExists($key);

// Create read-only root directory.
        @mkdir($this->directory, 0555, true);
        $this->assertTrue(is_dir($this->directory));

$this->cache->write($key, $content);
    }

/**
     * @expectedException RuntimeException
     * @expectedExceptionMessage Unable to write in the cache directory
     */
    public function testWriteFailDirWritable()
    {
        if (defined('PHP_WINDOWS_VERSION_BUILD')) {
            $this->markTestSkipped('Read-only directories not possible on Windows.');
        }

$key = $this->directory.'/cache/cachefile.php';
        $content = $this->generateSource();

$this->assertFileNotExists($key);

// Create root directory.
        @mkdir($this->directory, 0777, true);
        // Create read-only subdirectory.
        @mkdir($this->directory.'/cache', 0555);
        $this->assertTrue(is_dir($this->directory.'/cache'));

$this->cache->write($key, $content);
    }

/**
     * @expectedException RuntimeException
     * @expectedExceptionMessage Failed to write cache file
     */
    public function testWriteFailWriteFile()
    {
        $key = $this->directory.'/cache/cachefile.php';
        $content = $this->generateSource();

$this->assertFileNotExists($key);

// Create a directory in the place of the cache file.
        @mkdir($key, 0777, true);
        $this->assertTrue(is_dir($key));

$this->cache->write($key, $content);
    }

public function testGetTimestamp()
    {
        $key = $this->directory.'/cache/cachefile.php';

$dir = dirname($key);
        @mkdir($dir, 0777, true);
        $this->assertTrue(is_dir($dir));

// Create the file with a specific modification time.
        touch($key, 1234567890);

$this->assertSame(1234567890, $this->cache->getTimestamp($key));
    }

public function testGetTimestampMissingFile()
    {
        $key = $this->directory.'/cache/cachefile.php';
        $this->assertSame(0, $this->cache->getTimestamp($key));
    }

/**
     * Test file cache is tolerant towards trailing (back)slashes on the configured cache directory.
     *
     * @dataProvider provideDirectories
     */
    public function testGenerateKey($expected, $input)
    {
        $cache = new Twig_Cache_Filesystem($input);
        $this->assertRegExp($expected, $cache->generateKey('_test_', get_class($this)));
    }

public function provideDirectories()
    {
        $pattern = '#a/b/[a-zA-Z0-9]+/[a-zA-Z0-9]+.php$#';

return array(
            array($pattern, 'a/b'),
            array($pattern, 'a/b/'),
            array($pattern, 'a/b\\'),
            array($pattern, 'a/b\\/'),
            array($pattern, 'a/b\\//'),
            array('#/'.substr($pattern, 1), '/a/b'),
        );
    }

private function generateSource()
    {
        return strtr('<?php class {{classname}} {}', array(
            '{{classname}}' => $this->classname,
        ));
    }
}