assertNotNull(exception);
        assertNull(exception.getCause());
        assertNull(exception.getMessage());
    }

    /**
     * Test constructor with various cause types
     */
    public void test_constructor_withVariousCauseTypes() {
        // With Exception cause
        Exception exceptionCause = new Exception("Exception cause");

        @DisplayName("Should handle deeply nested exceptions")
        void testToStringWithNestedExceptions() {
            Exception innermost = new IOException("Innermost exception");
            Exception middle = new RuntimeException("Middle exception", innermost);
            Exception rootCause = new IllegalStateException("Outer exception", middle);
            TransportException exception = new TransportException("Transport failed", rootCause);

         * @param request the request data
         * @param exceptionList the list of exceptions that occurred during retries
         */
        void onRequestEnd(FaultTolerantClient client, RequestData request, List<Exception> exceptionList);

        /**
         * Called when an exception occurs during a request attempt.
         *
         * @param client the fault-tolerant client

        void testGetSessionKey_ThrowsCIFSException() throws Exception {
            DcerpcPipeHandle handle = createMockedDcerpcPipeHandle();
            CIFSException exception = new CIFSException("Test exception");
            when(mockSmbPipeHandleInternal.getSessionKey()).thenThrow(exception);
            assertThrows(CIFSException.class, handle::getSessionKey);
        }
    }

        executor.shutdown();

        // Then - No unexpected exceptions
        assertTrue(exceptions.isEmpty(), "No unexpected exceptions should occur");
    }

    /**
     * Test that CopyOnWriteArrayList prevents ConcurrentModificationException.
     */
    @Test
    public void testNoConcurrentModificationException() throws Exception {
        // Given

        Exception exception = assertThrows(Exception.class, () -> {
            new KerberosRelevantAuthData(emptyToken, keys);
        }, "An exception should be thrown for an empty token.");

        // The exception could be PACDecodingException or NullPointerException
        assertTrue(exception instanceof PACDecodingException || exception instanceof NullPointerException,

    }

    // Error case: disconnect throws IOException
    @Test
    @DisplayName("disconnect throws IOException when underlying close fails")
    void disconnect_throwsIOException() throws Exception {
        doThrow(new java.io.IOException("close error")).when(transport).disconnect(true, true);
        java.io.IOException ex = assertThrows(java.io.IOException.class, () -> transport.disconnect(true, true));

 */
package jcifs;

import java.io.IOException;

/**
 * Base for all checked exceptions used by this library
 *
 * @author mbechler
 *
 */
public class CIFSException extends IOException {

    /**
     *
     */
    private static final long serialVersionUID = 7806460518865806784L;

    /**
     * Constructs a CIFS exception with no detail message.
     */
    public CIFSException() {

This diagram shows `HTTPException`, but you could also raise any other exception that you catch in a dependency with `yield` or with a [Custom Exception Handler](../handling-errors.md#install-custom-exception-handlers){.internal-link target=_blank}.

        }, "Should throw UnknownHostException for non-existent NetBIOS name with type");

        // Verify the exception message indicates name resolution failure
        assertTrue(exception.getMessage().contains("NONEXISTENT") || exception.getMessage().contains("unknown")
                || exception.getMessage().contains("not found"), "Exception message should indicate name resolution failure");
    }

    @Test