Set<V> expectedValues = copyToSet(values);

      assertFalse(multimap().put(k, v));
      assertEquals(expectedValues, values);
      assertGet(k, expectedValues);
    }
  }

  @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_VALUES})
  @CollectionSize.Require(absent = ZERO)
  public void testPutDuplicateValue_null() {
    initMultimapWithNullValue();
    assertFalse(multimap().put(getKeyForNullValue(), null));

        for (Integer i : unfiltered) {
          if (EVEN.apply(i)) {
            assertTrue(filteredItr.hasNext());
            assertEquals(i, filteredItr.next());
          }
        }
        assertFalse(filteredItr.hasNext());
      }
    }

    public void testForEach() {
      for (List<Integer> contents : SAMPLE_INPUTS) {
        C unfiltered = createUnfiltered(contents);

    List<Integer> source = new LinkedList<>(asList(1, 2, 3));
    List<List<Integer>> partitions = partition(source, 2);
    assertFalse(partitions instanceof RandomAccess);
    assertFalse(partitions.get(0) instanceof RandomAccess);
    assertFalse(partitions.get(1) instanceof RandomAccess);
  }

  // TODO: use the ListTestSuiteBuilder

  public void testPartition_view() {

        queryContext = new QueryContext("test", false);
        queryContext.addSorts();

        assertFalse(queryContext.hasSorts());
        assertTrue(queryContext.sortBuilders().isEmpty());
    }

    // Test hasSorts
    public void test_hasSorts() {
        queryContext = new QueryContext("test", false);
        assertFalse(queryContext.hasSorts());

        queryContext.addSorts(SortBuilders.fieldSort("field"));

            @Override
            public QueryBuilder execute(QueryContext context, Query query, float boost, FilterChain chain) {
                calledSecond.set(true);
                assertFalse(called.get());
                assertFalse(calledFirst.get());
                QueryBuilder builder = chain.execute(context, query, boost);
                assertTrue(called.get());
                assertTrue(calledFirst.get());

      errorNotThrown = true;
    } catch (AssertionFailedError error) {
      // expected
      assertContains("must be Object#equals to", error.getMessage());
    }
    assertFalse(errorNotThrown);
  }

  public void testClassWhichIsAlwaysEqualButHasDifferentHashcodes() {
    ClassWhichIsAlwaysEqualButHasDifferentHashcodes orig =
        new ClassWhichIsAlwaysEqualButHasDifferentHashcodes();

    barrier.await(1, SECONDS);
    assertFalse(executor.isShutdown());
    assertFalse(executor.isTerminated());

    executor.shutdown();
    assertTrue(executor.isShutdown());
    assertThrows(RejectedExecutionException.class, () -> executor.submit(doNothingRunnable));
    assertFalse(executor.isTerminated());

    // WAIT #2
    barrier.await(1, SECONDS);
    assertFalse(executor.awaitTermination(20, MILLISECONDS));

        final SitemapSet sitemapSet = sitemapsHelper.parse(in);
        final Sitemap[] sitemaps = sitemapSet.getSitemaps();
        assertEquals(5, sitemaps.length);
        assertTrue(sitemapSet.isUrlSet());
        assertFalse(sitemapSet.isIndex());

        assertEquals("2005-01-01", sitemaps[0].getLastmod());
        assertEquals("http://www.example.com/", sitemaps[0].getLoc());

    @Override
    public void onSuccess(String result) {
      synchronized (monitor) {
        assertFalse(wasCalled);
        wasCalled = true;
        assertEquals(value, result);
      }
    }

    @Override
    public synchronized void onFailure(Throwable t) {
      synchronized (monitor) {
        assertFalse(wasCalled);
        wasCalled = true;
        assertEquals(failure, t);
      }
    }
  }

    // noinspection ObjectEqualsNull
    assertFalse("An object should not be equal to null.", collection.equals(null));
  }

  // A collection should essentially never be equal to a non-collection.
  @SuppressWarnings("UndefinedEquals")
  public void testEquals_notACollection() {
    // noinspection EqualsBetweenInconvertibleTypes
    assertFalse(