public class CollectionRemoveIfTester<E> extends AbstractCollectionTester<E> {
  @CollectionFeature.Require(SUPPORTS_ITERATOR_REMOVE)
  public void testRemoveIf_alwaysFalse() {
    assertFalse("removeIf(x -> false) should return false", collection.removeIf(x -> false));
    expectUnchanged();
  }

  @CollectionFeature.Require(SUPPORTS_ITERATOR_REMOVE)

    Map<String, Integer> unfiltered = createUnfiltered();
    unfiltered.put("cat", 3);
    unfiltered.put("dog", 2);
    unfiltered.put("horse", 5);
    Predicate<Object> predicate = Predicates.alwaysFalse();
    Map<String, Integer> filtered = Maps.filterEntries(unfiltered, predicate);
    assertTrue(filtered.isEmpty());
  }

  public void testFilteredEntriesWildCardEntryPredicate() {

    Map<String, Integer> unfiltered = createUnfiltered();
    unfiltered.put("cat", 3);
    unfiltered.put("dog", 2);
    unfiltered.put("horse", 5);
    Predicate<Object> predicate = Predicates.alwaysFalse();
    Map<String, Integer> filtered = Maps.filterEntries(unfiltered, predicate);
    assertTrue(filtered.isEmpty());
  }

  public void testFilteredEntriesWildCardEntryPredicate() {