Added more tests

code/test/test_packet_capturing.py

 import unittest
 from scapy.layers.inet import IP, TCP
 from unittest.mock import patch
-from scapy.layers.l2 import Ether
+from scapy.layers.l2 import Ether, ARP
+from scapy.packet import Raw
 
 from src.packet_capturing import packet_handler
 
@@ -53,6 +54,5 @@ class TestPacketCapturing(unittest.TestCase):
             packet_handler(packet)
             mock_print.assert_any_call("Illegal packet with source or destination port 0.")
 
-
 if __name__ == '__main__':
     unittest.main()