### Question:
LocalCacheHandler extends SimpleCacheHandler { @Override public void delete(String key) { cache.remove(key); } LocalCacheHandler();  LocalCacheHandler(Ticker ticker); Object get(String key); Map<String, Object> getBulk(Set<String> keys); @Override Object get(String key, Type type); @Override Map<String, Object> getBulk(Set<String> keys, Type type); @Override void set(String key, Object value, int exptimeSeconds); @Override void delete(String key); @Override void add(String key, Object value, int exptimeSeconds);  }### Answer:
@Test public void testDelete() throws Exception { Ticker4Test t = new Ticker4Test(); LocalCacheHandler cache = new LocalCacheHandler(t); int seconds = 100; String key = "key"; String value = "value"; cache.set(key, value, seconds); assertThat((String) cache.get(key), equalTo(value)); cache.delete(key); assertThat(cache.get(key), nullValue()); }