ByteSource checker =
        new ByteSource() {
          @Override
          public InputStream openStream() throws IOException {
            if (counter[0]++ != 0) {
              throw new IllegalStateException("More than one source open");
            }
            return new FilterInputStream(source.openStream()) {
              @Override
              public void close() throws IOException {
                super.close();

        }
    }

    @Test
    void causeConstructor_setsCause_andDerivesMessageFromCauseToString() {
        // Arrange - use a real cause so message is derived from cause.toString()
        Throwable cause = new IllegalStateException("proto mismatch");
        String expectedMessage = cause.toString();

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

    Lock lockA = factory.newReentrantLock(OtherOrder.FIRST);
    Lock lockB = factory.newReentrantReadWriteLock(OtherOrder.FIRST).readLock();

    lockA.lock();
    assertThrows(IllegalStateException.class, () -> lockB.lock());

    lockA.unlock();
    lockB.lock();
  }

  public void testReadLock_deadlock() {
    readLockA.lock(); // Establish an ordering from readLockA -> lockB.

    Lock lockA = factory.newReentrantLock(OtherOrder.FIRST);
    Lock lockB = factory.newReentrantReadWriteLock(OtherOrder.FIRST).readLock();

    lockA.lock();
    assertThrows(IllegalStateException.class, () -> lockB.lock());

    lockA.unlock();
    lockB.lock();
  }

  public void testReadLock_deadlock() {
    readLockA.lock(); // Establish an ordering from readLockA -> lockB.

        assertNull(exception.getCause());
    }

    public void test_constructor_withNestedCause() {
        // Test constructor with nested exception causes
        Exception rootCause = new IllegalStateException("Root cause");
        Exception middleCause = new RuntimeException("Middle cause", rootCause);
        String message = "Top level dictionary error";

        // Note: isTarget requires FessConfig which needs container
        // We can only verify the method handles missing container gracefully
        try {
            generator.isTarget(docMap);
        } catch (IllegalStateException e) {
            // Expected when container is not initialized
            assertTrue(e.getMessage().contains("Not initialized"));
        }
    }

    public void test_addCondition() {

    sizesToTest.retainAll(asList(CollectionSize.ZERO, CollectionSize.ONE, CollectionSize.SEVERAL));

    logger.fine("   Sizes: " + formatFeatureSet(sizesToTest));

    if (sizesToTest.isEmpty()) {
      throw new IllegalStateException(
          name
              + ": no CollectionSizes specified (check the argument to "
              + "FeatureSpecificTestSuiteBuilder.withFeatures().)");
    }

    TestSuite suite = new TestSuite(name);

    // System.setProperty("jdk.tls.client.enableSessionTicketExtension", "true")
    // System.setProperty("jdk.tls.server.enableSessionTicketExtension", "true")

    // IllegalStateException: Cannot resume session and session creation is disabled
    platform.assumeNotBouncyCastle()
  }

  @ParameterizedTest(name = "{displayName}({arguments})")
  @ValueSource(strings = ["TLSv1.2", "TLSv1.3"])
  @Flaky

    }

    public void test_nestedExceptionChain() {
        // Test nested exception chain
        Throwable rootCause = new IllegalArgumentException("Root cause");
        Throwable middleCause = new IllegalStateException("Middle cause", rootCause);
        ScheduledJobException exception = new ScheduledJobException("Top level error", middleCause);

        assertEquals("Top level error", exception.getMessage());

    public void test_throwAndCatchExceptionWithCause() {
        // Test throwing and catching the exception with cause
        String expectedMessage = "Storage write error";
        Exception expectedCause = new IllegalStateException("Invalid state");

        try {
            throw new StorageException(expectedMessage, expectedCause);
        } catch (StorageException e) {
            assertEquals(expectedMessage, e.getMessage());