@Before
  public void setup() {
    StringBuilder builder = new StringBuilder();
    for (int i = 0; i < MemcachedClientIF.MAX_KEY_LENGTH+1; i++) {
      builder.append("k");
    }
    tooLongKey = builder.toString();
  }
A dummy key which is longer than allowed.
src/test/java/net/spy/memcached/util/StringUtilsTest.java