@SuppressWarnings("IdentityHashMapBoxing") // explicitly testing IdentityHashMap
  public void testIdentityKeySetIteratorRemove() {
    BiMap<Integer, String> bimap =
        new AbstractBiMap<Integer, String>(
            new IdentityHashMap<Integer, String>(), new IdentityHashMap<String, Integer>()) {};
    bimap.put(1, "one");
    bimap.put(2, "two");
    bimap.put(3, "three");
    Iterator<Integer> iterator = bimap.keySet().iterator();

    return new RegularImmutableMap<K, V>(entryOf(k1, v1), entryOf(k2, v2));
  }

  public static <K, V> ImmutableMap<K, V> of(K k1, V v1, K k2, V v2, K k3, V v3) {
    return new RegularImmutableMap<K, V>(entryOf(k1, v1), entryOf(k2, v2), entryOf(k3, v3));
  }

  public static <K, V> ImmutableMap<K, V> of(K k1, V v1, K k2, V v2, K k3, V v3, K k4, V v4) {
    return new RegularImmutableMap<K, V>(

     */
    @Test
    public void testIsAncestor() throws Exception {
        final ClassLoader cl1 = new URLClassLoader(new URL[] { new URL("file:/foo") }, null);
        final ClassLoader cl2 = new URLClassLoader(new URL[] { new URL("file:/bar") }, cl1);
        final ClassLoader cl3 = new URLClassLoader(new URL[] { new URL("file:/baz") }, cl2);

        assertThat(ClassLoaderUtil.isAncestor(cl3, cl2), is(true));

    TestSuite suite = new TestSuite();
    suite.addTestSuite(SafeTreeMapTest.class);
    suite.addTest(
        NavigableMapTestSuiteBuilder.using(
                new TestStringSortedMapGenerator() {
                  @Override
                  protected SortedMap<String, String> create(Entry<String, String>[] entries) {
                    NavigableMap<String, String> map = new SafeTreeMap<>(Ordering.natural());

    assertEquals(6, (int) future.get());
  }

  public void testSameThreadScheduledExecutorWithException() throws InterruptedException {
    Runnable runnable =
        new Runnable() {
          @Override
          public void run() {
            throw new RuntimeException("Oh no!");
          }
        };

    Future<?> future = TestingExecutors.sameThreadScheduledExecutor().submit(runnable);

    assertEquals(6, (int) future.get());
  }

  public void testSameThreadScheduledExecutorWithException() throws InterruptedException {
    Runnable runnable =
        new Runnable() {
          @Override
          public void run() {
            throw new RuntimeException("Oh no!");
          }
        };

    Future<?> future = TestingExecutors.sameThreadScheduledExecutor().submit(runnable);

        SmbComCreateDirectory smbCom = new SmbComCreateDirectory(mockConfig, "testDir");
        byte[] buffer = new byte[10];
        int result = smbCom.readParameterWordsWireFormat(buffer, 0);
        assertEquals(0, result);
    }

    @Test
    void testReadBytesWireFormat() {
        // This method is empty, so it should return 0
        SmbComCreateDirectory smbCom = new SmbComCreateDirectory(mockConfig, "testDir");

        assertArgumentNotNull("statement", statement);
        assertArgumentNotEmpty("sql", sql);

        try {
            return statement.execute(sql);
        } catch (final SQLException ex) {
            throw new SQLRuntimeException(ex);
        }
    }

    /**
     * Sets the fetch size.
     *
     * @param statement
     *            {@link Statement}. Must not be {@literal null}.
     * @param fetchSize

                    propField.setAccessible(true);
                    propField.set(this, new org.dbflute.helper.jprop.ObjectiveProperties("test"));
                } catch (Exception e) {
                    throw new RuntimeException("Failed to initialize prop field", e);
                }
            }

            @Override
            public String getIndexFieldTitle() {

    testAddAndRemove(new ConcurrentHashMap<String, AtomicInteger>());
  }

  public void testAddAndRemove_concurrentSkipListMap() throws Exception {
    testAddAndRemove(new ConcurrentSkipListMap<String, AtomicInteger>());
  }

  public void testAddAndRemove_mapMakerMap() throws Exception {
    MapMaker mapMaker = new MapMaker();
    // force MapMaker to use its own MapMakerInternalMap