if (initialBytes == null) {
        return checkNotNull(bytes);
      } else {
        byte[] result = new byte[initialBytes.length + bytes.length];
        System.arraycopy(initialBytes, 0, result, 0, initialBytes.length);
        System.arraycopy(bytes, 0, result, initialBytes.length, bytes.length);
        return result;
      }
    }

    @Override
    public byte[] getSinkContents() throws IOException {

            // Combine IV and ciphertext
            byte[] result = new byte[GCM_IV_SIZE + ciphertext.length];
            System.arraycopy(iv, 0, result, 0, GCM_IV_SIZE);
            System.arraycopy(ciphertext, 0, result, GCM_IV_SIZE, ciphertext.length);

            return result;

        } finally {
            // Securely wipe plaintext bytes - guaranteed by try-finally

                counter[0]--;
              }
            };
          }
        };
    Reader joinedReader = CharSource.concat(reader, reader, reader).openStream();
    String result = CharStreams.toString(joinedReader);
    assertEquals(testString.length() * 3, result.length());
  }

  public void testReady() throws Exception {
    CharSource source = newCharSource("a");
    Iterable<? extends CharSource> list = ImmutableList.of(source, source);

    }

    @Test
    void testHelpExecuteReturnsZero() throws Exception {
        UpgradeContext context = createMockContext();

        int result = help.execute(context);

        assertEquals(0, result, "Help goal should return 0 (success)");
    }

    @Test
    void testHelpExecuteDoesNotThrow() throws Exception {
        UpgradeContext context = createMockContext();

  /**
   * Override to return a chaining listenableFuture that returns the result of getSuccessfulResult()
   * when inputFuture returns VALID_INPUT_DATA, and sets the exception to EXCEPTION in all other
   * cases.
   */
  protected abstract ListenableFuture<T> buildChainingFuture(ListenableFuture<Integer> inputFuture);

  /**
   * Override to return the result when VALID_INPUT_DATA is passed in to the chaining
   * listenableFuture
   */

    }

    @Override
    public String next() {
        if (!hasNext()) {
            throw new NoSuchElementException();
        }
        final String result = line;
        line = EMPTY;
        return result;
    }

    @Override
    public void remove() {
        throw new ClUnsupportedOperationException("remove");
    }

      val result = mutableListOf<String>()
      for (subjectAltName in subjectAltNames) {
        if (subjectAltName == null || subjectAltName.size < 2) continue
        if (subjectAltName[0] != type) continue
        val altName = subjectAltName[1] ?: continue
        result.add(altName as String)
      }
      return result
    } catch (_: CertificateParsingException) {

     */
    fun concatLengthPrefixed(protocols: List<Protocol>): ByteArray {
      val result = Buffer()
      for (protocol in alpnProtocolNames(protocols)) {
        result.writeByte(protocol.length)
        result.writeUtf8(protocol)
      }
      return result.readByteArray()
    }
  }

     */
    String getParent();

    /**
     * Returns the full uncanonicalized URL of this SMB resource. An
     * <code>SmbFile</code> constructed with the result of this method will
     * result in an <code>SmbFile</code> that is equal to the original.
     *
     * @return The uncanonicalized full URL of this SMB resource.
     */

    String getPath();

    /**

        // Act
        String result = trans.toString();

        // Assert
        assertNotNull(result);
        assertTrue(result.contains("TransTransactNamedPipe"));
        assertTrue(result.contains("pipeFid=" + TEST_FID));
    }

    @Test
    @DisplayName("Test with null data array")
    void testWithNullData() {