invalidateCaches(self::$testCacheDir);
foreach (self::$pages as $page) {
$this->assertFileNotExists(self::$testCacheDir.'/'.$page.'.cache');
invalidateCaches(self::$testCacheDir);
foreach (self::$pages as $page) {
$this->assertFileNotExists(self::$testCacheDir.'/'.$page.'.cache');