CacheBuilder.newBuilder().initialCapacity(Integer.MAX_VALUE);
    // that the builder didn't blow up is enough;
    // don't actually create this monster!
  }

  public void testConcurrencyLevel_zero() {
    CacheBuilder<Object, Object> builder = CacheBuilder.newBuilder();
    assertThrows(IllegalArgumentException.class, () -> builder.concurrencyLevel(0));
  }

  public void testConcurrencyLevel_setTwice() {