testBlock.setDigest(mockDigest);
        byte[] buffer = new byte[1024];

        int length = testBlock.encode(buffer, 0);

        assertTrue(length > 0);
        verify(mockDigest).sign(eq(buffer), eq(0), eq(length), eq(testBlock), any());
    }

    @Test
    @DisplayName("Test decode basic message")

        SecurityBlob blob = new SecurityBlob(data);

        // Assert
        assertSame(data, blob.get(), "get() should expose the same array reference passed in");
        assertEquals(data.length, blob.length(), "length() should match underlying array length");
        assertEquals("deadbeef", blob.toString(), "toString() should reflect underlying content");
        assertEquals(data.hashCode(), blob.hashCode(), "hashCode should equal the array's hashCode");

    checkArgument(
        string.length() >= 2, "input string (%s) must have at least 2 characters", string);
    checkArgument(
        string.length() % 2 == 0,
        "input string (%s) must have an even number of characters",
        string);

    byte[] bytes = new byte[string.length() / 2];
    for (int i = 0; i < string.length(); i += 2) {
      int ch1 = decode(string.charAt(i)) << 4;

    return (T[]) Arrays.copyOfRange(array, 0, array.length);
  }

  // TODO: Consolidate different copies in one single place.
  static String format(String template, Object... args) {
    // start substituting the arguments into the '%s' placeholders
    StringBuilder builder = new StringBuilder(template.length() + 16 * args.length);
    int templateStart = 0;
    int i = 0;
    while (i < args.length) {

        String[] titleValues = data.getValues("title");
        assertNotNull(titleValues);
        assertEquals(1, titleValues.length);
        assertEquals("Test Title", titleValues[0]);

        String[] authorValues = data.getValues("author");
        assertNotNull(authorValues);
        assertEquals(1, authorValues.length);
        assertEquals("John Doe", authorValues[0]);
    }

    public void test_putValues() {

        firstInstance.decode(originalBuffer, 0, originalBuffer.length);

        // Encode from first instance
        byte[] encodedBuffer = new byte[8];
        firstInstance.encode(encodedBuffer, 0);

        // Decode into second instance
        FileInternalInfo secondInstance = new FileInternalInfo();
        secondInstance.decode(encodedBuffer, 0, encodedBuffer.length);

        // Verify both instances have same values

            System.arraycopy(commentBytes, 0, buffer, commentOffset, commentBytes.length);
            buffer[commentOffset + commentBytes.length] = 0;
            commentOffset += commentBytes.length + 1;
        }

        // Read the data
        int bytesRead = response.readDataWireFormat(buffer, 0, buffer.length);

        // Verify results
        assertTrue(bytesRead > 0);

    void testReadLengthMaximum() {
        byte[] src = { (byte) 0x00, (byte) 0x01, (byte) 0xFF, (byte) 0xFF };
        int length = SessionServicePacket.readLength(src, 0);

        assertEquals(0x01FFFF, length);
    }

    @Test
    @DisplayName("readLength should handle zero length")
    void testReadLengthZero() {
        byte[] src = { (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00 };

   */
  public static long[] concat(long[]... arrays) {
    long length = 0;
    for (long[] array : arrays) {
      length += array.length;
    }
    long[] result = new long[checkNoOverflow(length)];
    int pos = 0;
    for (long[] array : arrays) {
      System.arraycopy(array, 0, result, pos, array.length);
      pos += array.length;
    }
    return result;
  }

            final int code = bytesReader.readVInt();
            final int count = code >>> 1;
            for (int i = 0; i < count; i++) {
                synonymMap.words.get(bytesReader.readVInt(), scratchBytes);
                if (scratchChars.chars.length < scratchBytes.length) {
                    scratchChars.chars = new char[scratchBytes.length];
                }