import java.nio.ByteBuffer;
import java.nio.charset.Charset;
import org.jspecify.annotations.Nullable;

/**
 * A hash function is a collision-averse pure function that maps an arbitrary block of data to a
 * number called a <i>hash code</i>.
 *
 * <h3>Definition</h3>
 *
 * <p>Unpacking this definition:
 *
 * <ul>
 *   <li><b>block of data:</b> the input for a hash function is always, in concept, an ordered byte

            assertEquals(4, buffer.size()); // 2 bytes for level + 2 bytes for null terminator
        }

        @Test
        @DisplayName("Should create buffer with null path")
        void testConstructorWithNullPath() {
            String path = null;
            int maxReferralLevel = 2;

            // The implementation doesn't check for null in constructor
            buffer = new DfsReferralRequestBuffer(path, maxReferralLevel);

    }

    @Test
    @DisplayName("Test with null buffer in read methods")
    void testReadMethodsWithNullBuffer() {
        trans2SetFileInfo = new Trans2SetFileInformation(config, TEST_FID, mockFileInfo);

        // All read methods should handle null buffer gracefully
        assertEquals(0, trans2SetFileInfo.readSetupWireFormat(null, 0, 0));

	// If set to nil, it will not be called.

	// agreed is called if all disks agreed.
	agreed func(entry metaCacheEntry)

	// partial will be called when there is disagreement between disks.
	// if disk did not return any result, but also haven't errored
	// the entry will be empty and errs will
	partial func(entries metaCacheEntries, errs []error)

	// finished will be called when all streams have finished and

    check(this.connection == null)
    this.connection = connection
    connection.calls.add(CallReference(this, callStackTrace))
  }

  /**
   * Releases resources held with the request or response of [exchange]. This should be called when
   * the request completes normally or when it fails due to an exception, in which case [e] should
   * be non-null.
   *

//
// Any NULL and non-NULL value combinations for (`run_options`,
// `run_metadata`) are valid.
//
//    - `run_options` may be NULL, in which case it will be ignored; or
//      non-NULL, in which case it must point to a `TF_Buffer` containing the
//      serialized representation of a `RunOptions` protocol buffer.
//    - `run_metadata` may be NULL, in which case it will be ignored; or

      try {
        close();
      } finally {
        if (memory == null) {
          memory = new MemoryOutput();
        } else {
          memory.reset();
        }
        out = memory;
        if (file != null) {
          File deleteMe = file;
          file = null;
          if (!deleteMe.delete()) {
            throw new IOException("Could not delete: " + deleteMe);

        return complete(v, null, COMPLETED);
      }

      /** Transition to the COMPLETED state and set the exception. */
      boolean setException(Throwable t) {
        return complete(null, t, COMPLETED);
      }

      /** Transition to the CANCELLED or INTERRUPTED state. */
      boolean cancel(boolean interrupt) {
        return complete(null, null, interrupt ? INTERRUPTED : CANCELLED);
      }

  public void testSubmit() throws Exception {
    /*
     * Mostly just tests that TrustedListenableFutureTask are created and run; tests for
     * TrustedListenableFutureTask should ensure that listeners are called correctly.
     */

    TestListeningExecutorService e = new TestListeningExecutorService();

    TestRunnable runnable = new TestRunnable();
    ListenableFuture<?> runnableFuture = e.submit(runnable);

  public void testSubmit() throws Exception {
    /*
     * Mostly just tests that TrustedListenableFutureTask are created and run; tests for
     * TrustedListenableFutureTask should ensure that listeners are called correctly.
     */

    TestListeningExecutorService e = new TestListeningExecutorService();

    TestRunnable runnable = new TestRunnable();
    ListenableFuture<?> runnableFuture = e.submit(runnable);