ImmutableListMultimap.Builder<String, String> builder = ImmutableListMultimap.builder();
    assertThrows(IllegalArgumentException.class, () -> builder.expectedValuesPerKey(-1));
  }

  public void testBuilderWithExpectedValuesPerKeyZero() {
    ImmutableListMultimap.Builder<String, String> builder =
        ImmutableListMultimap.<String, String>builder().expectedValuesPerKey(0);
    builder.put("key", "value");