// Should either throw exception or fail gracefully after close
            try {
                digest.sign(data, 0, data.length, request, response);
                // If no exception is thrown, the operation should have been no-op or handled gracefully
                assertTrue(true, "Sign operation after close should either throw exception or handle gracefully");

        CIFSException thrown = assertThrows(CIFSException.class, () -> {
            watchHandle.close();
        });

        assertEquals("Failed to close handle", thrown.getMessage());
        verify(watchHandle, times(1)).close();
    }

    /**
     * Test AutoCloseable behavior with try-with-resources
     */
    @Test
    void testAutoCloseable() throws CIFSException {

  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: "

   * performance for unescaped strings (as measured by {@code CharEscapersBenchmark}).
   *
   * @param string the literal string to be escaped
   * @return the escaped form of {@code string}
   * @throws NullPointerException if {@code string} is null
   * @throws IllegalArgumentException if invalid surrogate characters are encountered
   */
  @Override
  public String escape(String string) {
    checkNotNull(string);
    int end = string.length();

    @Test
    void testDfsImplConstructor() {
        // The constructor is called in setUp(), so if no exception is thrown, this test passes.
        assertNotNull(dfsImpl);
    }

    // Tests for isTrustedDomain
    @Test
    void testIsTrustedDomain_DfsDisabled() throws SmbAuthException {
        // Scenario: DFS is disabled in the configuration.
        when(mockConfig.isDfsDisabled()).thenReturn(true);

        void testGetTransportContext() throws Exception {
            DcerpcPipeHandle handle = createMockedDcerpcPipeHandle();
            assertEquals(mockContext, handle.getTransportContext());
        }

        @Test
        @DisplayName("Should return correct server name")
        void testGetServer() throws Exception {
            DcerpcPipeHandle handle = createMockedDcerpcPipeHandle();

     * any one time. If this method throws an exception or the connect timeout
     * expires an encapsulating TransportException will be thrown from connect
     * and the transport will be in error.
     */

    /**
     * Establishes a connection to the remote endpoint.
     *
     * @throws Exception if the connection fails
     */
    protected abstract void doConnect() throws Exception;

        when(dest.getAttributes()).thenReturn(SmbConstants.ATTR_ARCHIVE); // no READONLY bit

        // Act + Assert
        SmbAuthException thrown =
                assertThrows(SmbAuthException.class, () -> SmbCopyUtil.openCopyTargetFile(dest, SmbConstants.ATTR_NORMAL, false));
        assertSame(authEx, thrown, "Should rethrow the same SmbAuthException instance");
        verify(dest, times(1)).getAttributes();

        // When/Then: Should throw last exception
        IOException thrown = assertThrows(IOException.class, () -> poolSpy.getSmbTransport(ctx, "failing.server", 445, false, false));
        assertSame(secondException, thrown);

        // Verify fail counts incremented
        assertEquals(1, pool.failCounts.get("10.0.0.1"));

  @Override
  public final void tearDown() {
    try {
      sloppyTearDown();
    } catch (Throwable t) {
      logger.log(Level.INFO, "exception thrown during tearDown: " + t.getMessage(), t);
    }
  }

  public abstract void sloppyTearDown() throws Exception;