*/
    public int getErrorCode() {
        return this.error;
    }

    /**
     *
     * @return the root cause
     * @deprecated use {@link #getCause()}
     */
    @Deprecated
    public Throwable getRootCause() {
        return getCause();
    }

        assertEquals(message, exception.getMessage());
        assertEquals(middleCause, exception.getCause());
        assertEquals("Middle cause", exception.getCause().getMessage());
        assertEquals(rootCause, exception.getCause().getCause());
        assertEquals("Root cause", exception.getCause().getCause().getMessage());
    }

    @Test
    public void test_serialVersionUID() {

        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());
    }

    @Test
    public void test_withLongMessage() {

        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());
    }

    @Test
    public void test_throwAndCatch() {

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

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

import org.jspecify.annotations.Nullable;

/**
 * {@link Error} variant of {@link java.util.concurrent.ExecutionException}. As with {@code
 * ExecutionException}, the error's {@linkplain #getCause() cause} comes from a failed task,
 * possibly run in another thread. That cause should itself be an {@code Error}; if not, use {@code
 * ExecutionException} or {@link UncheckedExecutionException}. This allows the client code to

        assertEquals("Final message", exception.getMessage());
        assertSame(intermediateCause, exception.getCause());
        assertSame(rootCause, exception.getCause().getCause());
    }

    @Test
    public void testToString() {
        String message = "Test error message";
        CurlException exception = new CurlException(message);

        /*
         * Cast to ExecutionException to satisfy our nullness checker, which (unsoundly but
         * *usually* safely) assumes that getCause() returns non-null on an ExecutionException.
         */
        CombinedFuture.this.setException(((ExecutionException) error).getCause());
      } else if (error instanceof CancellationException) {
        cancel(false);
      } else {
        CombinedFuture.this.setException(error);

        final LlmException exception = new LlmException("Top level error", middleCause);

        assertEquals("Top level error", exception.getMessage());
        assertSame(middleCause, exception.getCause());
        assertSame(rootCause, exception.getCause().getCause());
    }

    @Test
    public void test_nullMessage() {
        final LlmException exception = new LlmException(null);
        assertNull(exception.getMessage());
    }

        QueryParseException queryParseException = new QueryParseException(parseException);

        assertEquals(parseException, queryParseException.getCause());
        assertEquals(rootCause, queryParseException.getCause().getCause());
    }

    @Test
    public void test_toString() {
        // Test toString method
        String errorMessage = "ToString test error";