iterator.next();
        });
  }

  @CollectionFeature.Require(absent = SUPPORTS_ADD)
  @CollectionSize.Require(absent = ZERO)
  public void testAddAll_unsupportedAllPresent() {
    try {
      assertFalse(
          "addAll(allPresent) should return false or throw",
          collection.addAll(MinimalCollection.of(e0())));
    } catch (UnsupportedOperationException tolerated) {