String ts = ex.toString();
        assertTrue(ts.contains("SMBProtocolDecodingException"), "toString should include class name");
        if (message != null && !message.isEmpty()) {
            assertTrue(ts.contains(message), "toString should include non-empty message");
        }
    }

    @Test

        assertEquals(BooleanQuery.class, query.getClass());
        clauses = ((BooleanQuery) query).clauses();
        assertEquals(TermQuery.class, clauses.get(0).query().getClass());
        assertEquals("_default:fess", clauses.get(0).query().toString());
        assertEquals(Occur.MUST, clauses.get(0).occur());
        assertEquals(TermQuery.class, clauses.get(1).query().getClass());
        assertEquals("_default:codelibs", clauses.get(1).query().toString());

    }

    @Test
    public void test_constructorWithCause() {
        // Test constructor with cause only
        Exception cause = new NullPointerException("Query object is null");

        SearchQueryException exception = new SearchQueryException(cause);

        assertEquals(cause, exception.getCause());
        assertEquals("java.lang.NullPointerException: Query object is null", exception.getMessage());

        Throwable cause = new IllegalStateException("proto mismatch");
        String expectedMessage = cause.toString();

        // Act
        SMBProtocolDowngradeException ex = new SMBProtocolDowngradeException(cause);

        // Assert - cause preserved, message derived from cause
        assertSame(cause, ex.getCause());
        assertEquals(expectedMessage, ex.getMessage());

        // toString should include the derived message

        // Expect the message to be set correctly and cause to be null
        assertEquals(errorMessage, e.getMessage());
        assertNull(e.getCause());
    }

    /**
     * Test the constructor with a cause.
     */
    @Test
    void testCauseConstructor() {
        Throwable cause = new RuntimeException("Root cause");
        PACDecodingException e = new PACDecodingException(cause);

    super(message, cause);
  }

  /**
   * Creates a new instance with {@code null} as its detail message and the given cause. Prefer to
   * provide a non-nullable {@code cause}, as many users expect to find one.
   */
  public UncheckedExecutionException(@Nullable Throwable cause) {
    super(cause);
  }

        // Test constructor with message and cause
        String message = "Test error message";
        Throwable cause = new RuntimeException("Underlying cause");
        SearchEngineClientException exception = new SearchEngineClientException(message, cause);

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

    @Test

    /**
     * Constructs a new SuggestIndexException with the specified cause.
     * @param cause The cause.
     */
    public SuggestIndexException(final Throwable cause) {
        super(cause);
    }

    /**
     * Constructs a new SuggestIndexException with the specified detail message and cause.
     * @param msg The detail message.
     * @param cause The cause.
     */

    }

    /**
     * Returns the <code>SQL</code>.
     *
     * @param cause the underlying exception
     * @return the <code>SQL</code>
     */
    protected static String getSql(final SQLException cause) {
        if (cause instanceof ClSQLException) {
            return ((ClSQLException) cause).getSql();
        }
        return "";
    }

    /**
     * Returns the real message.

     *            Message code
     * @param args
     *            Array of arguments
     * @param cause
     *            The cause of the exception
     */
    public ClSQLException(final String messageCode, final Object[] args, final Throwable cause) {
        this(messageCode, args, null, 0, cause, null);
    }

    /**
     * Creates a {@link ClSQLException}.
     *
     * @param messageCode