// Test odd size (should handle correctly)
        byte[] data3 = { 0x0A, 0x0B, 0x0C };
        assertEquals("0", Hexdump.toHexString(data3, 0, 1)); // 1 char = 0.5 bytes (rounds up to 1)
        assertEquals("0A", Hexdump.toHexString(data3, 0, 2)); // 2 chars = 1 byte
        assertEquals("0A0", Hexdump.toHexString(data3, 0, 3)); // 3 chars = 1.5 bytes (rounds up to 2)

        String str = key.toString();

        assertTrue(str.startsWith("LeaseKey["));
        assertTrue(str.endsWith("]"));
        assertTrue(str.contains("00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F"));
    }