// Test backward compatibility - verify RuntimeException still works
        String message = "SSO runtime error";
        RuntimeException runtimeException = new RuntimeException("SSO processing failed");
        SsoProcessException exception = new SsoProcessException(message, runtimeException);

        assertEquals(message, exception.getMessage());

      immediateFailedFuture(CHECKED_EXCEPTION);
  static final RuntimeException UNCHECKED_EXCEPTION = new RuntimeException("mymessage");
  static final Future<String> FAILED_FUTURE_UNCHECKED_EXCEPTION =
      immediateFailedFuture(UNCHECKED_EXCEPTION);
  static final RuntimeException RUNTIME_EXCEPTION = new RuntimeException();
  static final OtherThrowable OTHER_THROWABLE = new OtherThrowable();

        for (int i = 0; i < 3; i++) {
            final int index = i;
            try {
                circuitBreaker.executeWithCircuitBreaker(() -> {
                    throw new RuntimeException("Test failure " + index);
                });
                fail("Should have thrown exception");
            } catch (CIFSException e) {
                // Expected
            }
        }

        // Test that it can be caught as RuntimeException
        try {
            throw new DictionaryExpiredException();
        } catch (RuntimeException e) {
            assertNotNull(e);
            assertTrue(e instanceof DictionaryExpiredException);
        } catch (Exception e) {
            fail("Should have caught as RuntimeException");
        }
    }

    @Test

        // Test with null message
        RuntimeException nullMessageEx = new RuntimeException();
        assertNull(nullMessageEx.getMessage());

        // Test with empty message
        RuntimeException emptyMessageEx = new RuntimeException("");
        assertEquals("", emptyMessageEx.getMessage());
    }

    // Test JSON response creation helper
    @Test

    }

    @Test
    public void test_constructor_withMessageAndCause() {
        // Test constructor with message and cause
        String message = "Plugin initialization failed";
        Throwable cause = new RuntimeException("Underlying error");
        PluginException exception = new PluginException(message, cause);

        assertNotNull(exception);
        assertEquals(message, exception.getMessage());

    checkNotNull(throwable);
    if (throwable instanceof RuntimeException) {
      throw (RuntimeException) throwable;
    }
    if (throwable instanceof Error) {
      throw (Error) throwable;
    }
  }

  /**
   * Propagates {@code throwable} exactly as-is, if and only if it is an instance of {@link
   * RuntimeException} or {@link Error}.
   *

        assertEquals(message, exception.getMessage());
        assertNull(exception.getCause());

        // Test that suppression is enabled
        RuntimeException suppressed = new RuntimeException("Suppressed exception");
        exception.addSuppressed(suppressed);
        assertEquals(1, exception.getSuppressed().length);
        assertEquals(suppressed, exception.getSuppressed()[0]);
    }

    try {
      CountDownLatch latch = new CountDownLatch(1);
      RuntimeException expected =
          assertThrows(RuntimeException.class, () -> GcFinalization.await(latch));
      assertWrapsInterruptedException(expected);
    } finally {
      interruptenator.shutdown();
      Thread.interrupted();
    }
  }

        // Create a root cause exception
        RuntimeException rootCause = new RuntimeException("Root cause error");
        TransportException exception = new TransportException(rootCause);

        // Verify the exception has the correct cause
        assertNotNull(exception);
        assertEquals(rootCause, exception.getCause());
        assertEquals("java.lang.RuntimeException: Root cause error", exception.getMessage());