Added ip spoofing test case

code/test/test_packet_capturing.py

@@ -17,6 +17,12 @@ class TestPacketCapturing(unittest.TestCase):
             packet_handler(packet)
             mock_print.assert_called_with("Packet captured: 100.84.6.141 -> 192.168.1.1")
 
+    def test_ip_spoofing(self):
+        packet = IP(src = "169.254.6.141", dst = "192.168.1.1")
+
+        with patch('builtins.print') as mock_print:
+            packet_handler(packet)
+            mock_print.assert_called_with("Possible IP spoofing using private networks detected.")
 
 if __name__ == '__main__':
     unittest.main()