[Config] Added tests for the ConfigCache.

src/Symfony/Component/Config/Tests/ConfigCacheTest.php

@@ -0,0 +1,138 @@
+<?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\Config\Tests;
+
+use Symfony\Component\Config\ConfigCache;
+use Symfony\Component\Config\Resource\FileResource;
+
+class ConfigTest extends \PHPUnit_Framework_TestCase
+{
+    private $resourceFile = null;
+
+    private $cacheFile = null;
+
+    private $metaFile = null;
+
+    public function setUp()
+    {
+        $this->resourceFile = tempnam(sys_get_temp_dir(), '_resource');
+        $this->cacheFile = tempnam(sys_get_temp_dir(), 'config_');
+        $this->metaFile = $this->cacheFile.'.meta';
+
+        $this->makeCacheFresh();
+        $this->generateMetaFile();
+    }
+
+    public function tearDown()
+    {
+        $files = array($this->cacheFile, $this->metaFile, $this->resourceFile);
+
+        foreach ($files as $file) {
+            if (file_exists($file)) {
+                unlink($file);
+            }
+        }
+    }
+
+    public function testToString()
+    {
+        $cache = new ConfigCache($this->cacheFile, true);
+
+        $this->assertSame($this->cacheFile, (string) $cache);
+    }
+
+    public function testCacheIsNotFreshIfFileDoesNotExist()
+    {
+        unlink($this->cacheFile);
+
+        $cache = new ConfigCache($this->cacheFile, false);
+
+        $this->assertFalse($cache->isFresh());
+    }
+
+    public function testCacheIsAlwaysFreshIfFileExistsWithDebugDisabled()
+    {
+        $this->makeCacheStale();
+
+        $cache = new ConfigCache($this->cacheFile, false);
+
+        $this->assertTrue($cache->isFresh());
+    }
+
+    public function testCacheIsNotFreshWithoutMetaFile()
+    {
+        unlink($this->metaFile);
+
+        $cache = new ConfigCache($this->cacheFile, true);
+
+        $this->assertFalse($cache->isFresh());
+    }
+
+    public function testCacheIsFreshIfResourceIsFresh()
+    {
+        $cache = new ConfigCache($this->cacheFile, true);
+
+        $this->assertTrue($cache->isFresh());
+    }
+
+    public function testCacheIsNotFreshIfOneOfTheResourcesIsNotFresh()
+    {
+        $this->makeCacheStale();
+
+        $cache = new ConfigCache($this->cacheFile, true);
+
+        $this->assertFalse($cache->isFresh());
+    }
+
+    public function testWriteDumpsFile()
+    {
+        unlink($this->cacheFile);
+        unlink($this->metaFile);
+
+        $cache = new ConfigCache($this->cacheFile, false);
+        $cache->write('FOOBAR');
+
+        $this->assertFileExists($this->cacheFile, 'Cache file is created');
+        $this->assertSame('FOOBAR', file_get_contents($this->cacheFile));
+        $this->assertFileNotExists($this->metaFile, 'Meta file is not created');
+    }
+
+    public function testWriteDumpsMetaFileWithDebugEnabled()
+    {
+        unlink($this->cacheFile);
+        unlink($this->metaFile);
+
+        $metadata = array(new FileResource($this->resourceFile));
+
+        $cache = new ConfigCache($this->cacheFile, true);
+        $cache->write('FOOBAR', $metadata);
+
+        $this->assertFileExists($this->cacheFile, 'Cache file is created');
+        $this->assertFileExists($this->metaFile, 'Meta file is created');
+        $this->assertSame(serialize($metadata), file_get_contents($this->metaFile));
+    }
+
+    private function makeCacheFresh()
+    {
+        touch($this->resourceFile, filemtime($this->cacheFile) - 3600);
+    }
+
+    private function makeCacheStale()
+    {
+        touch($this->cacheFile, time() - 3600);
+    }
+
+    private function generateMetaFile()
+    {
+        file_put_contents($this->metaFile, serialize(array(new FileResource($this->resourceFile))));
+    }
+}