ConnectionTimeoutException exception = new ConnectionTimeoutException();
        assertNull(exception.getMessage(), "Message should be null for no-arg constructor");
        assertNull(exception.getCause(), "Cause should be null for no-arg constructor");
    }

    @Test
    void testStringConstructor() {
        // Test the constructor with a message
        String message = "Connection timed out.";

        RequestTimeoutException exception = new RequestTimeoutException();
        assertNull(exception.getMessage(), "Message should be null for no-arg constructor");
        assertNull(exception.getCause(), "Cause should be null for no-arg constructor");
    }

    @Test
    void testMessageConstructor() {
        // Test the constructor with a message argument
        String message = "Test message";

        assertEquals(SmbException.getMessageByCode(errCode), ex.getMessage(), "message should reflect error code mapping");
        assertEquals(expectedStatus, ex.getNtStatus(), "status should map based on code");
        assertNull(ex.getCause(), "cause must be null for int constructor");
        assertNull(ex.getRootCause(), "rootCause must be null for int constructor");
    }

    /**
     * Validate message-only constructor with both null and empty messages.

        try {
            return parseArgs(Options.SOURCE_CLI, args);
        } catch (ParseException e) {
            throw new IllegalArgumentException("Failed to parse CLI arguments: " + e.getMessage(), e.getCause());
        }
    }

    protected MavenOptions parseMavenAtFileOptions(Path atFile) {
        try (Stream<String> lines = Files.lines(atFile, StandardCharsets.UTF_8)) {
            List<String> args =

        assertEquals(message, exception.getMessage(), "Message should match the input.");
        assertEquals(cause, exception.getCause(), "Cause should match the input.");
        assertEquals(cause, exception.getRootCause(), "getRootCause() should return the same cause as getCause().");
    }

    /**
     * Test getErrorCode() method.
     */
    @Test
    void testGetErrorCode() {

        assertThat(clIllegalStateException.getMessage(), is("hoge"));
        assertThat(clIllegalStateException.getCause(), instanceOf(NullPointerException.class));
    }

    /**
     * Test method for
     * {@link org.codelibs.core.exception.ClIllegalStateException#SIllegalStateException(java.lang.Throwable)}
     * .
     */

      throw e;
    } catch (ExecutionException e) {
      wrapAndThrowRuntimeExecutionExceptionOrError(e.getCause());
      throw new AssertionError();
    }
  }

  private static Exception throwCause(Exception e, boolean combineStackTraces) throws Exception {
    Throwable cause = e.getCause();
    if (cause == null) {
      throw e;
    }
    if (combineStackTraces) {

            logger.error(message);

            if (e != null) {
                logger.error(e.getMessage());

                for (Throwable cause = e.getCause();
                        cause != null && cause != cause.getCause();
                        cause = cause.getCause()) {
                    logger.error("Caused by: {}", cause.getMessage());
                }
            }
        }
    }

                    next.getSQLState())).append("], [");
            next = next.getNextException();
        }
        Throwable t = cause.getCause();
        while (t != null) {
            buf.append(t.getMessage()).append("], [");
            t = t.getCause();
        }
        buf.setLength(buf.length() - 4);
        return new String(buf);
    }

        } catch (Exception e) {
            // Find the root cause - it should be related to unregistered class
            Throwable rootCause = e;
            while (rootCause.getCause() != null && rootCause.getCause() != rootCause) {
                rootCause = rootCause.getCause();
            }
            String message = rootCause.getMessage();
            assertTrue("Exception message should mention unregistered class: " + message,