PrimitiveIterator.OfLong longIterator =
        (PrimitiveIterator.OfLong) ImmutableLongArray.of(1, 2, 3).asList().iterator();
    assertThat(longIterator.nextLong()).isEqualTo(1);
    assertThat(longIterator.nextLong()).isEqualTo(2);
    assertThat(longIterator.nextLong()).isEqualTo(3);
    assertThat(longIterator.hasNext()).isFalse();
  }

  public void testCopyOf_array_empty() {
    /*

                }

                final long minSleep = retryInterval + retryCount * 1000L;
                final long maxSleep = retryInterval + retryCount * 2000L;
                ThreadUtil.sleep(RandomUtils.nextLong(minSleep, maxSleep));
                retryCount++;
            }
        }
    }

    /**
     * Destroys the client and closes connections.
     */
    @PreDestroy
    public void destroy() {