// Arrange: filter delegates to isDirectory which may throw SmbException
        SmbFileFilter filter = f -> f.isDirectory();
        SmbException boom = new SmbException("io error");
        when(smbFile.isDirectory()).thenThrow(boom);

        // Act + Assert
        SmbException thrown = assertThrows(SmbException.class, () -> filter.accept(smbFile));
        assertEquals("io error", thrown.getMessage());

    TestApplication application = new TestApplication();
    ExecutorService service = mock(ExecutorService.class);
    application.addDelayedShutdownHook(service, 2, SECONDS);
    when(service.awaitTermination(2, SECONDS)).thenThrow(new InterruptedException());
    application.shutdown();
    verify(service).shutdown();
  }

  public void testGetExitingExecutorService_executorSetToUseDaemonThreads() {

        when(locator.getType()).thenReturn(SmbConstants.TYPE_WORKGROUP);
        when(locator.getURL()).thenReturn(createSmbURL("smb://"));
        when(nameFilter.accept(any(SmbResource.class), anyString())).thenThrow(new CIFSException("Filter error"));

        // Mock response
        when(treeHandle.send(any(), any(), (RequestParam[]) any())).thenAnswer(invocation -> {
            return invocation.getArgument(1);
        });

    }

    @Test
    void testFailureWithNoAlternativeChannels() throws Exception {
        failedChannel.addPendingOperation(mockOperation);

        when(mockLoadBalancer.selectChannel(mockOperation)).thenThrow(new ChannelLoadBalancer.NoAvailableChannelException("No channels"));

        IOException error = new IOException("Connection failed");

        // Should not throw exception even if no alternative channels

        assertSame(a3, l3.getNextAddress());
        assertFalse(l3.hasNextAddress());

        // UnknownHostException yields CIFSException
        when(nsc.getAllByName("badhost", true)).thenThrow(new UnknownHostException("nope"));
        SmbResourceLocatorImpl bad = locator("smb://badhost/");
        CIFSException ex = assertThrows(CIFSException.class, bad::getAddress);

        List<FileEntry> entries = Arrays.asList(entry("bad", SmbConstants.TYPE_SHARE), entry("good", SmbConstants.TYPE_SHARE));

        // First call throws, second accepts
        when(filter.accept(any())).thenThrow(new CIFSException("boom")).thenReturn(true);

        ShareEnumIterator it = new ShareEnumIterator(parent, entries.iterator(), filter);

        assertTrue(it.hasNext());
        SmbResource res = it.next();

     * @throws IOException
     */
    @Test
    void testHandshakeThrowsRuntimeExceptionOnFailure() throws Exception {
        // Arrange
        when(mockConnection.getHeaderField(0)).thenThrow(new RuntimeException("Connection failed"));
        doNothing().when(mockConnection).connect();

        // Act & Assert
        assertThrows(RuntimeCIFSException.class, () -> {

    void testReauthenticatePropagates() throws Exception {
        SmbSessionImpl session = newSession();
        // Cause the inner reauthenticate to fail at first transport call
        when(transport.getNegotiateResponse()).thenThrow(new SmbException("fail"));
        assertThrows(CIFSException.class, session::reauthenticate);
    }

            when(mockStrategies.get(0).isApplicable(context)).thenReturn(true);
            when(mockStrategies.get(0).apply(Mockito.eq(context), Mockito.any()))
                    .thenThrow(new RuntimeException("Strategy failed"));

            when(mockStrategies.get(1).isApplicable(context)).thenReturn(false);
            when(mockStrategies.get(2).isApplicable(context)).thenReturn(false);

    TestApplication application = new TestApplication();
    ExecutorService service = mock(ExecutorService.class);
    application.addDelayedShutdownHook(service, 2, SECONDS);
    when(service.awaitTermination(2, SECONDS)).thenThrow(new InterruptedException());
    application.shutdown();
    verify(service).shutdown();
  }

  public void testGetExitingExecutorService_executorSetToUseDaemonThreads() {