*
     * @return the NTLM challenge from the domain controller
     * @throws SmbException if an SMB error occurs
     * @throws UnknownHostException if the domain controller cannot be resolved
     */
    public static NtlmChallenge getChallengeForDomain() throws SmbException, UnknownHostException {
        if (DOMAIN == null) {
            throw new SmbException("A domain was not specified");
        }
        synchronized (DOMAIN) {

   * may execute concurrently, and listeners may execute in an order different from the one in which
   * they were registered.
   *
   * <p>RuntimeExceptions thrown by a listener will be caught and logged. Any exception thrown
   * during {@code Executor.execute} (e.g., a {@code RejectedExecutionException}) will be caught and
   * logged.
   *

    /** Constructor for use by subclasses. */
    public StandardKeySet() {
      super(ForwardingSortedMap.this);
    }
  }

  // unsafe, but worst case is a CCE or NPE is thrown, which callers will be expecting
  @SuppressWarnings({"unchecked", "nullness"})
  static int unsafeCompare(
      @Nullable Comparator<?> comparator, @Nullable Object o1, @Nullable Object o2) {
    if (comparator == null) {

   * null will be returned.
   *
   * @throws ParameterNotInstantiableException if the static methods cannot be invoked because the
   *     default value of a parameter cannot be determined.
   * @throws IllegalAccessException if the class isn't public or is nested inside a non-public
   *     class, preventing its methods from being accessible.
   * @throws InvocationTargetException if a static method threw exception.
   */

        // Execute and verify exception is thrown
        assertThrows(SmbException.class, () -> tree.send(request, response));
        // After network name deleted error, tree should be disconnected
        assertEquals(0, tree.connectionState);
    }

    @Test
    void testSendInvalidOperationForNonDiskService() throws SmbException {
        SmbTree tree = new SmbTree(session, "testShare", "PRINT");

    @Test
    public void test_initializeProbes() {
        // Test that initializeProbes doesn't throw exception
        try {
            ThumbnailGenerator.initializeProbes();
            // If no exception thrown, test passes
            assertTrue(true);
        } catch (Exception e) {
            fail("initializeProbes should not throw exception: " + e.getMessage());
        }
    }

    @Test

  public void testToString_misbehaving() throws Exception {
    assertThat(
            new AbstractFuture<Object>() {
              @Override
              public String pendingToString() {
                throw new RuntimeException("I'm a misbehaving implementation");
              }
            }.toString())
        .matches(
            "[^\\[]+\\[status=PENDING, info=\\[Exception thrown from implementation: "

            assertNotNull(exception.getStackTrace());
            assertTrue(exception.getStackTrace().length > 0);

            // Test that it can be thrown as IOException
            assertThrows(IOException.class, () -> {
                throw exception;
            });
        }
    }

    @Nested
    @DisplayName("Edge Cases")
    class EdgeCaseTests {

        @Test

     * @return selected channel
     * @throws NoAvailableChannelException if no healthy channels available
     */
    public ChannelInfo selectChannel(CommonServerMessageBlock message) throws NoAvailableChannelException {
        Collection<ChannelInfo> availableChannels = manager.getHealthyChannels();

        if (availableChannels.isEmpty()) {
            throw new NoAvailableChannelException("No healthy channels available");

   * sees an Error?
   */
  @AndroidIncompatible
  public void testTaskThrowsError() throws Exception {
    class MyError extends Error {}
    CyclicBarrier barrier = new CyclicBarrier(2);
    // we need to make sure the error gets thrown on a different thread.
    ExecutorService service = newSingleThreadExecutor();
    try {