assertFalse(multimap.containsValue(1));
    assertFalse(multimap.containsEntry("foo", 1));
    assertTrue(multimap.entries().isEmpty());
    assertTrue(multimap.equals(HashMultimap.create()));
    assertEquals(emptySet(), multimap.get("foo"));
    assertEquals(0, multimap.hashCode());
    assertTrue(multimap.isEmpty());
    assertEquals(HashMultiset.create(), multimap.keys());
    assertEquals(emptySet(), multimap.keySet());

                    final Tuple3<String, String, String> task = thumbnailTaskQueue.poll(thumbnailTaskQueueTimeout, TimeUnit.MILLISECONDS);
                    if (task == null) {
                        if (!taskList.isEmpty()) {
                            storeQueue(taskList);
                        }
                    } else if (!taskList.contains(task)) {
                        taskList.add(task);

                return "[]";
            }
        };

        List<Artifact> result = testHelper.loadArtifactsFromRepository("test.yaml");
        assertNotNull(result);
        assertTrue(result.isEmpty());
    }

    public void test_loadArtifactsFromRepository_nullResult() {
        PluginHelper testHelper = new PluginHelper() {
            @Override
            protected String getRepositoryContent(String url) {

     */
    public static Traverser[] getTraversers(final String rootPackage) {
        if (StringUtil.isEmpty(rootPackage)) {
            return EMPTY_ARRAY;
        }

        final String baseName = toDirectoryName(rootPackage);
        final List<Traverser> list = newArrayList();

    }

    /**
     * Returns true if this map contains no key-value mappings.
     *
     * @return true if this map contains no key-value mappings
     */
    @Override
    public boolean isEmpty() {
        return parent.isEmpty();
    }

    /**
     * Returns true if this map contains a mapping for the specified key.
     *
     * @param key the key whose presence in this map is to be tested

    assertThat(TypeToken.of(Types.supertypeOf(String[].class)).getGenericInterfaces()).isEmpty();
  }

  public void testGetGenericInterfaces_wildcard_boundIsClass() {
    assertThat(TypeToken.of(Types.subtypeOf(Object.class)).getGenericInterfaces()).isEmpty();
    assertThat(TypeToken.of(Types.subtypeOf(Object[].class)).getGenericInterfaces()).isEmpty();
  }

        assertNotNull(queryMap);
        assertTrue(queryMap instanceof LinkedHashMap);
        assertTrue(queryMap.isEmpty());
    }

    public void test_addQuery() {
        assertTrue(facetQueryView.getQueryMap().isEmpty());

        facetQueryView.addQuery("key1", "query1");
        assertEquals(1, facetQueryView.getQueryMap().size());

    assertThat(keySet).isEmpty();

    // add 0, 1, 2, 3, 4
    getAll(cache, asList(0, 1, 2, 3, 4));
    CacheTesting.drainRecencyQueues(cache);
    assertThat(keySet).containsExactly(0, 1, 2, 3, 4);

    // invalidate all
    cache.invalidateAll();
    CacheTesting.drainRecencyQueues(cache);
    assertThat(keySet).isEmpty();

    // add 5, 6, 7, 8, 9, 10, 11, 12

                            }
                            return null;
                        }

                        final List<String> errors = auth.getErrors();
                        if (!errors.isEmpty()) {
                            logger.warn("{}", errors.stream().collect(Collectors.joining(", ")));
                            if (auth.isDebugActive() && StringUtil.isNotBlank(auth.getLastErrorReason())) {

        writeShort(0) // answerCount
        writeShort(0) // authorityResourceCount
        writeShort(0) // additional

        val nameBuf = Buffer()
        val labels = host.split('.').dropLastWhile { it.isEmpty() }
        for (label in labels) {
          val utf8ByteCount = label.utf8Size()
          require(utf8ByteCount == label.length.toLong()) { "non-ascii hostname: $host" }
          nameBuf.writeByte(utf8ByteCount.toInt())