public function testIsFreshConfigExpire()
 {
     touch(TMP . '/libs.js');
     $data = parse_ini_file($this->testConfig, true);
     $constants = array('TEST_FILES' => $this->_testFiles);
     $config = new AssetConfig($data, $constants, strtotime('-1 minute'));
     $config->cachePath('js', TMP);
     $config->set('js.timestamp', false);
     $cache = new AssetCache($config);
     $this->assertTrue($cache->isFresh('libs.js'));
     $config = new AssetConfig($data, $constants, strtotime('+1 minute'));
     $config->cachePath('js', TMP);
     $config->set('js.timestamp', false);
     $cache = new AssetCache($config);
     $this->assertFalse($cache->isFresh('libs.js'));
     unlink(TMP . '/libs.js');
 }