### Question:
NamedCache { synchronized LRUCacheEntry get(final Bytes key) { if (key == null) { return null; } final LRUNode node = getInternal(key); if (node == null) { return null; } updateLRU(node); return node.entry; } NamedCache(final String name, final StreamsMetrics metrics); long size();  }### Answer:
@Test public void shouldReturnNullIfKeyIsNull() throws Exception { assertNull(cache.get(null)); }