}
    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();
    }

     * @return A new {@code UnaryOperator<String>} that caches the results of the original function.
     *         If the original function returns null for a given input, null will be cached and returned for subsequent calls with the same input.
     *
     * @see Function
     * @see Optional
     * @see HashMap#computeIfAbsent(Object, Function)
     */
    static UnaryOperator<String> memoize(UnaryOperator<String> callback) {

        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) {

    client =
      client
        .newBuilder()
        // Since this test knowingly leaks a connection, avoid using the default shared connection
        // pool, which should remain clean for subsequent tests.
        .connectionPool(ConnectionPool())
        .addNetworkInterceptor(
          Interceptor { chain: Interceptor.Chain? ->
            val response =
              chain!!.proceed(

   */
  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

        }

        // 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();

since MinIO will attempt to migrate any existing IAM data - the boot process may
take slightly longer, but may not be visibly noticeable. Once the migration has

        @DisplayName("read after close throws 'Bad file descriptor'")
        void readAfterCloseThrows() throws Exception {
            SmbFileInputStream in = newStream();
            // closing should null tmp; subsequent readDirect should fail
            in.close();
            IOException ex = assertThrows(IOException.class, () -> in.readDirect(new byte[8], 0, 4));
            assertTrue(ex.getMessage().contains("Bad file descriptor"));

   * 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();
  }

  /**