Making sure directory "4" and "2" becomes non-full so that they are
     * reused for future getRelativePathForLocalization() calls in the order
     * they are freed.
Making sure directory "4" and "2" becomes non-full so that they are
     * reused for future getRelativePathForLocalization() calls in the order
     * they are freed. | TestLocalCacheDirectoryManager.java