assertEquals(8, bytesDecoded);
        assertEquals(expectedIndexNumber, fileInternalInfo.getIndexNumber());
    }

    @Test
    @DisplayName("Test encode with valid data")
    void testEncodeWithValidData() throws SMBProtocolDecodingException {
        // First decode to set internal state
        byte[] sourceBuffer = new byte[8];
        long expectedIndexNumber = 0x0123456789ABCDEFL;