assertTrue(result.endsWith(",dc=SERVER123]"));

            // Hexdump.toHexString with size = length * 2 produces 8 uppercase hex chars
            // The hex should be "010203FF"
            assertTrue(result.contains("010203FF"));
        }

        @Test
        @DisplayName("toString with empty challenge array")
        void testToStringWithEmptyChallenge() {
            UniAddress dc = mock(UniAddress.class);

        assertEquals("abc", StringUtil.substringToLast("abc", "dddd"));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testToHex() throws Exception {
        assertEquals("010203", StringUtil.toHex(new byte[] { 1, 2, 3 }));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testToHex2() throws Exception {
        assertEquals("0001", StringUtil.toHex(1));

            assertEquals("Expected structureSize = 60", exception.getMessage());
        }

        @ParameterizedTest
        @ValueSource(ints = { 0, 10, 20, 30 })
        @DisplayName("Should correctly read from different buffer offsets")
        void testReadBytesWireFormatWithDifferentOffsets(int offset) throws SMBProtocolDecodingException {
            // Given