Hexdump.toHexChars(0x123456789ABCDEF0L, dst4, 0, 16);
        assertEquals("123456789ABCDEF0", new String(dst4));
    }

    @Test
    @DisplayName("Should verify HEX_DIGITS constant")
    void testHexDigitsConstant() {
        // Verify the HEX_DIGITS array contains correct values
        assertEquals(16, Hexdump.HEX_DIGITS.length);
        assertEquals('0', Hexdump.HEX_DIGITS[0]);