final Throwable[] causes = mcae.getCauses();
                if (causes.length > 0) {
                    t = causes[causes.length - 1];
                }
            }

            String errorName;
            final Throwable cause = t.getCause();
            if (cause != null) {
                errorName = cause.getClass().getCanonicalName();

   *
   * <p>Prefer this method instead of manually casting an exception's cause. For example, {@code
   * (IOException) e.getCause()} throws a {@link ClassCastException} that discards the original
   * exception {@code e} if the cause is not an {@link IOException}, but {@code
   * Throwables.getCauseAs(e, IOException.class)} keeps {@code e} as the {@link
   * ClassCastException}'s cause.
   *

        assertEquals(level1, topLevel.getCause());
        assertEquals("Level 1: Authentication service error", topLevel.getCause().getMessage());
        assertEquals(level2, topLevel.getCause().getCause());
        assertEquals("Level 2: User lookup failed", topLevel.getCause().getCause().getMessage());
        assertEquals(level3, topLevel.getCause().getCause().getCause());

        assertEquals("Top level error", exception.getMessage());
        assertEquals(intermediateCause, exception.getCause());
        assertEquals("Intermediate cause", exception.getCause().getMessage());
        assertEquals(rootCause, exception.getCause().getCause());
        assertEquals("Root cause", exception.getCause().getCause().getMessage());
    }

    public void test_withLongMessage() {
        // Test with a very long message

        assertEquals("Theme operation failed", exception.getMessage());
        assertNotNull(exception.getCause());
        assertEquals(middleCause, exception.getCause());
        assertEquals("Processing failed", exception.getCause().getMessage());

        // Check nested cause
        Throwable nestedCause = exception.getCause().getCause();
        assertNotNull(nestedCause);
        assertEquals(innerCause, nestedCause);

        assertEquals("LDAP operation failed", exception.getMessage());
        assertEquals(middleCause, exception.getCause());
        assertEquals("LDAP configuration error", exception.getCause().getMessage());
        assertEquals(innerCause, exception.getCause().getCause());
        assertEquals("Invalid LDAP parameter", exception.getCause().getCause().getMessage());
    }

    public void test_throwAndCatch() {

        assertNotNull(exception);
        assertEquals(message, exception.getMessage());
        assertEquals(intermediateCause, exception.getCause());
        assertEquals(rootCause, exception.getCause().getCause());
    }

    public void test_constructor_withSpecialCharactersInMessage() {
        // Test constructor with special characters in message

        assertEquals("Top level", topException.getMessage());
        assertEquals(middleCause, topException.getCause());
        assertEquals(rootCause, topException.getCause().getCause());
    }

    public void test_serialVersionUID() {
        // Test that serialVersionUID is properly defined

        assertNull(nullCauseException.getCause());

        // Test with both null
        TransportException bothNullException = new TransportException(null, null);
        assertNull(bothNullException.getMessage());
        assertNull(bothNullException.getCause());
    }

    @Test
    @DisplayName("Test deprecated getRootCause method returns the same as getCause")
    @SuppressWarnings("deprecation")

        assertEquals(message, exception.getMessage());
        assertEquals(middleCause, exception.getCause());
        assertEquals(rootCause, exception.getCause().getCause());
    }

    public void test_exceptionSerialization() {
        // Test that the exception is serializable
        String message = "Serialization test";
        Exception cause = new Exception("Test cause");