ImmutableSetMultimap.<String, String>builder().orderValuesBy(Ordering.natural());
    assertThrows(IllegalArgumentException.class, () -> builder.expectedValuesPerKey(-1));
  }

  public void testBuilderWithExpectedValuesPerKeyZeroOrderValuesBy() {
    ImmutableSetMultimap.Builder<String, String> builder =
        ImmutableSetMultimap.<String, String>builder()
            .orderValuesBy(Ordering.natural())
            .expectedValuesPerKey(0);