use realpath() to ensure that test passes on Max OS X where sys_get_t…

…emp_dir() and realpath(sys_get_temp_dir()) are two different things.

test/Storage/Adapter/FilesystemTest.php

@@ -89,7 +89,7 @@ protected function _removeRecursive($dir)
 
     public function testNormalizeCacheDir()
     {
-        $cacheDir = $cacheDirExpected = sys_get_temp_dir();
+        $cacheDir = $cacheDirExpected = realpath(sys_get_temp_dir());
 
         if (DIRECTORY_SEPARATOR != '/') {
             $cacheDir = str_replace(DIRECTORY_SEPARATOR, '/', $cacheDir);