int byte2 = bytes[index++];
        if (byte2 > (byte) 0xBF
            // Check that 1 <= plane <= 16. Tricky optimized form of:
            // if (byte1 > (byte) 0xF4
            //     || byte1 == (byte) 0xF0 && byte2 < (byte) 0x90
            //     || byte1 == (byte) 0xF4 && byte2 > (byte) 0x8F)
            || (((byte1 << 28) + (byte2 - (byte) 0x90)) >> 30) != 0
            // Third byte trailing-byte test

    private LeaseV1CreateContextRequest leaseContext;
    private Smb2LeaseKey testKey;
    private int testState;

    @BeforeEach
    void setUp() {
        byte[] keyBytes = new byte[] { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10 };
        testKey = new Smb2LeaseKey(keyBytes);
        testState = Smb2LeaseState.SMB2_LEASE_READ_WRITE;

  public void testIsWellFormed_4BytesSamples() {
    // Valid 4 byte.
    assertWellFormed(0xF0, 0xA4, 0xAD, 0xA2);
    // Bad trailing bytes
    assertNotWellFormed(0xF0, 0xA4, 0xAD, 0x7F);
    assertNotWellFormed(0xF0, 0xA4, 0xAD, 0xC0);
    // Special cases for byte2
    assertNotWellFormed(0xF0, 0x8F, 0xAD, 0xA2);
    assertNotWellFormed(0xF4, 0x90, 0xAD, 0xA2);
  }

  /** Tests some hard-coded test cases. */

0x64, 0x61, 0x74, 0x61, 0xc4, 0x4, 0x74, 0x72, 0x75, 0x65, 0xa7, 0x4d, 0x65, 0x74, 0x61, 0x55, 0x73, 0x72, 0x82, 0xac, 0x63, 0x6f, 0x6e, 0x74, 0x65, 0x6e, 0x74, 0x2d, 0x74, 0x79, 0x70, 0x65, 0xb8, 0x61, 0x70, 0x70, 0x6c, 0x69, 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x2f, 0x6f, 0x63, 0x74, 0x65, 0x74, 0x2d, 0x73, 0x74, 0x72, 0x65, 0x61, 0x6d, 0xa4, 0x65, 0x74, 0x61, 0x67, 0xd9, 0x20, 0x62, 0x65, 0x65, 0x62, 0x32, 0x32, 0x30, 0x66, 0x61, 0x39, 0x64, 0x65, 0x36, 0x31, 0x36, 0x36, 0x62, 0x64, 0x31, 0x66,...

	o = append(o, 0xbf, 0x64, 0x65, 0x70, 0x65, 0x6e, 0x64, 0x47, 0x6c, 0x6f, 0x62, 0x61, 0x6c, 0x42, 0x61, 0x63, 0x6b, 0x67, 0x72, 0x6f, 0x75, 0x6e, 0x64, 0x48, 0x65, 0x61, 0x6c, 0x53, 0x74, 0x61, 0x74, 0x65)
	o = msgp.AppendBool(o, z.dependGlobalBackgroundHealState)
	// string "dependBucketTargetSys"
	o = append(o, 0xb5, 0x64, 0x65, 0x70, 0x65, 0x6e, 0x64, 0x42, 0x75, 0x63, 0x6b, 0x65, 0x74, 0x54, 0x61, 0x72, 0x67, 0x65, 0x74, 0x53, 0x79, 0x73)

        src[srcIndex + 53] = 0x04; // flags: active

        // MAC address (6 bytes)
        byte[] testMac = { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55 };
        System.arraycopy(testMac, 0, src, srcIndex + 55, 6);

        // Statistics (6 bytes)
        byte[] stats = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05 };
        System.arraycopy(stats, 0, src, srcIndex + 61, 6);

            // Unicode strings are written as UTF-16LE with null terminator
            assertTrue(bytesWritten > testString.length());
            // First byte should be 'T' in UTF-16LE (0x54)
            assertEquals(0x54, buffer[10] & 0xFF);
        }

        @Test
        @DisplayName("Test write string without Unicode")
        void testWriteStringNonUnicode() {
            testBlock.setUseUnicode(false);

	o = append(o, 0xb2, 0x54, 0x6f, 0x74, 0x61, 0x6c, 0x45, 0x72, 0x72, 0x6f, 0x72, 0x73, 0x54, 0x69, 0x6d, 0x65, 0x6f, 0x75, 0x74)
	o = msgp.AppendUint64(o, z.TotalErrorsTimeout)
	// string "TotalWrites"
	o = append(o, 0xab, 0x54, 0x6f, 0x74, 0x61, 0x6c, 0x57, 0x72, 0x69, 0x74, 0x65, 0x73)
	o = msgp.AppendUint64(o, z.TotalWrites)
	// string "TotalDeletes"
	o = append(o, 0xac, 0x54, 0x6f, 0x74, 0x61, 0x6c, 0x44, 0x65, 0x6c, 0x65, 0x74, 0x65, 0x73)

    void testEquals() {
        byte[] testBytes1 = new byte[] { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10 };
        byte[] testBytes2 = Arrays.copyOf(testBytes1, 16);
        byte[] testBytes3 = new byte[] { 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20 };

        assertEquals((byte) 0x34, dst[0]);
        assertEquals((byte) 0x12, dst[1]);

        // LIST_COUNT (2 bytes, LE)
        int listCount = Trans2FindFirst2.LIST_COUNT;
        assertEquals((byte) (listCount & 0xFF), dst[2]);
        assertEquals((byte) ((listCount >> 8) & 0xFF), dst[3]);

        // informationLevel (2 bytes, LE) -> 0x0104
        assertEquals((byte) 0x04, dst[4]);