void releaseNullIsNoop() {
        BufferCacheImpl impl = new BufferCacheImpl(1, 4);
        assertDoesNotThrow(() -> impl.releaseBuffer(null));
        // Subsequent get should still work
        assertEquals(4, impl.getBuffer().length);
    }

    // Capacity behavior: when full, additional releases are dropped; only cached buffers are returned
    @Test

        }

        // Third call should return the same cached Subject instance
        Subject third = auth.getSubject();
        assertEquals(second, third, "Subsequent calls should return same cached result");

        // Refresh should clear the cache
        auth.refresh();
        Subject afterRefresh = auth.getSubject();

   *
   * <p>This bug is this: if you create an iterator from a TreeSet and call next() on that iterator
   * when hasNext() is false, so that next() throws a NoSuchElementException, then subsequent calls
   * to remove() will incorrectly throw an IllegalStateException, instead of removing the last
   * element returned.
   *
   * <p>See <a href="https://bugs.openjdk.org/browse/JDK-6529795">JDK-6529795</a>
   */

    }
    filesToDelete.add(tempFile);
    return tempFile;
  }

  /**
   * Gets a temp dir for testing. The returned directory and all contents of it will be deleted in
   * the tear-down for this test. Subsequent invocations of this method will return the same
   * directory.
   */
  protected final File getTempDir() throws IOException {
    if (tempDir == null) {
      tempDir = createTempDir();
    }

   * that this method will return a different number of chars than would be returned by reading all
   * of the chars.
   *
   * <p>Additionally, for mutable sources such as {@code StringBuilder}s, a subsequent read may
   * return a different number of chars if the contents are changed.
   *
   * @since 19.0
   */
  public Optional<Long> lengthIfKnown() {
    return Optional.absent();
  }

  /**

    }

    @Test
    void testOpenConnection_CachedHandler_ReusesExistingHandler() throws Exception {
        // This test verifies that once a handler is cached, subsequent calls reuse it.
        setupMockProtocolHandlers();
        URL url1 = new URL("http://example.com/resource1");
        URL url2 = new URL("http://example.com/resource2");

        response.readDataWireFormat(buffer, 0, buffer.length);

        SecurityDescriptor sd = response.getSecurityDescriptor();
        assertNotNull(sd);

        // Verify it's the same instance on subsequent calls
        SecurityDescriptor sd2 = response.getSecurityDescriptor();
        assertSame(sd, sd2);
    }

    @Test
    @DisplayName("Test readDataWireFormat with zero length buffer")

                throw new IOException("corrupted stream - high tag number < 31 found");
            }

            tagNo = b & 0x7f;

            // X.690-0207 8.1.2.4.2
            // "c) bits 7 to 1 of the first subsequent octet shall not all be zero."
            if (0 == tagNo) {
                throw new IOException("corrupted stream - invalid high tag number found");
            }

            while ((b & 0x80) != 0) {

     */
    Waiter(boolean unused) {}

    Waiter() {
      // avoid volatile write, write is made visible by subsequent CAS on waitersField field
      putThread(this, Thread.currentThread());
    }

    // non-volatile write to the next field. Should be made visible by a subsequent CAS on
    // waitersField.
    void setNext(@Nullable Waiter next) {
      putNext(this, next);
    }

   */
  fun send(bytes: ByteString): Boolean

  /**
   * Attempts to initiate a graceful shutdown of this web socket. Any already-enqueued messages will
   * be transmitted before the close message is sent but subsequent calls to [send] will return
   * false and their messages will not be enqueued.
   *
   * This returns true if a graceful shutdown was initiated by this call. It returns false if