// Should return immediately without processing
        assertDoesNotThrow(() -> digest.update(data, 0, 0));
    }

    @Test
    @DisplayName("Test digest method")
    void testDigest() {
        SMB1SigningDigest digest = new SMB1SigningDigest(testMacSigningKey);
        byte[] data = new byte[] { 0x01, 0x02, 0x03, 0x04 };
        digest.update(data, 0, data.length);