@Test(expected = ro.isdc.wro.WroRuntimeException.class)
public void testDestroy() throws Exception {

    CacheKey key = new CacheKey("groupName", ResourceType.CSS);
    CacheValue value = CacheValue.valueOf("rawContent", "hash");
    DiskbackedCache cache = new DiskbackedCache(100);
    cache.put(key, value);
    cache.destroy();
    cache.get(key);
}