@GwtIncompatible // Non-UTF-8 Charset
  public void testWhyUsAsciiIsDangerous() {
    byte[] b1 = "朝日新聞".getBytes(Charsets.US_ASCII);
    byte[] b2 = "聞朝日新".getBytes(Charsets.US_ASCII);
    byte[] b3 = "????".getBytes(Charsets.US_ASCII);
    byte[] b4 = "ニュース".getBytes(Charsets.US_ASCII);
    byte[] b5 = "スューー".getBytes(Charsets.US_ASCII);
    // Assert they are all equal (using the transitive property)
    assertThat(b1).isEqualTo(b2);

        final byte[] data1 = "abc".getBytes();
        assertEquals("YWJj", Base64Util.encode(data1));

        // Test case 2: Single padding
        final byte[] data2 = "abcd".getBytes();
        assertEquals("YWJjZA==", Base64Util.encode(data2));

        // Test case 3: Double padding
        final byte[] data3 = "abcde".getBytes();
        assertEquals("YWJjZGU=", Base64Util.encode(data3));

        System.arraycopy("SHARE1".getBytes(StandardCharsets.US_ASCII), 0, data, 0, 6);
        data[14] = 0x00;
        data[15] = 0x00; // type = 0
        data[16] = 40;
        data[17] = 0;
        data[18] = 0;
        data[19] = 0; // remark offset

        // Entry 2: IPC$, type 3 (IPC), remark "Inter-Process Communication"
        System.arraycopy("IPC$".getBytes(StandardCharsets.US_ASCII), 0, data, 20, 4);

        response.byteCount = 15; // 8 bytes key + 6 bytes "DOMAIN" + 1 null terminator

        // Prepare byte array
        byte[] encryptionKey = "12345678".getBytes();
        byte[] domainNameBytes = "DOMAIN".getBytes(ServerMessageBlock.OEM_ENCODING);
        ByteBuffer buffer = ByteBuffer.allocate(response.byteCount);
        buffer.put(encryptionKey);
        buffer.put(domainNameBytes);

  @GwtIncompatible // Non-UTF-8 Charset
  public void testWhyUsAsciiIsDangerous() {
    byte[] b1 = "朝日新聞".getBytes(Charsets.US_ASCII);
    byte[] b2 = "聞朝日新".getBytes(Charsets.US_ASCII);
    byte[] b3 = "????".getBytes(Charsets.US_ASCII);
    byte[] b4 = "ニュース".getBytes(Charsets.US_ASCII);
    byte[] b5 = "スューー".getBytes(Charsets.US_ASCII);
    // Assert they are all equal (using the transitive property)
    assertThat(b1).isEqualTo(b2);

        buf.append("\"memory\":{");
        buf.append("\"heap\":{");
        append(buf, "used", () -> mem.getHeapUsed().getBytes()).append(',');
        append(buf, "committed", () -> mem.getHeapCommitted().getBytes()).append(',');
        append(buf, "max", () -> mem.getHeapMax().getBytes()).append(',');
        append(buf, "percent", () -> mem.getHeapUsedPercent());
        buf.append("},");
        buf.append("\"non_heap\":{");

    @DisplayName("Should calculate HMAC-T64 correctly")
    void testHMACT64() {
        // Given
        byte[] key = "secret".getBytes();
        byte[] data = "Hello World".getBytes();

        // When
        MessageDigest hmac = Crypto.getHMACT64(key);
        byte[] result = hmac.digest(data);

        // Then
        assertNotNull(result);
        assertTrue(result.length > 0, "HMAC-T64 should produce non-empty result");

        // Test multiple calls to readDataWireFormat to ensure buffer is overwritten
        byte[] firstData = "First data set".getBytes();
        byte[] secondData = "Second data set".getBytes();
        byte[] buffer1 = new byte[100];
        byte[] buffer2 = new byte[100];

        System.arraycopy(firstData, 0, buffer1, 0, firstData.length);

     * @param encoding the character encoding to use
     * @return encoded byte array, or empty array if str is null
     */
    public static byte[] getBytes(final String str, final Charset encoding) {
        if (str == null) {
            return new byte[0];
        }
        return str.getBytes(encoding);
    }

    /**
     * Encodes a string into UTF-16LE (Unicode Little Endian) bytes.
     *
     * @param str the string to encode

     */
    @Test
    void testParseAuthDataPacWithInvalidToken() {
        // GIVEN an invalid token for AUTH_DATA_PAC
        byte[] invalidToken = "invalid-pac-token".getBytes();

        // WHEN parsing the auth data
        // THEN a PACDecodingException should be thrown
        assertThrows(PACDecodingException.class, () -> {