@Test public void testPrune() { Cache<String, String> cache = new LRUCache<String, String>(3); cache.put("1", "1"); cache.put("2", "2"); cache.put("3", "3"); assertEquals(0, cache.prune()); assertEquals(3, cache.size()); cache.put("4", "4"); assertEquals(0, cache.prune()); assertEquals(3, cache.size()); }