#1715 - Added more tests. MAde use of the pydantic model_post_init function for proper ipv4 cofiguration checking. Added NetworkError to exceptions.py.

tests/integration_tests/network/test_nic_link_connection.py

@@ -0,0 +1,14 @@
+import pytest
+
+from primaite.simulator.network.physical_layer import Link, NIC
+
+
+def test_link_fails_with_same_nic():
+    """Tests Link creation fails with endpoint_a and endpoint_b are the same NIC."""
+    with pytest.raises(ValueError):
+        nic_a = NIC(
+            ip_address="192.168.1.2",
+            subnet_mask="255.255.255.0",
+            gateway="192.168.0.1",
+        )
+        Link(endpoint_a=nic_a, endpoint_b=nic_a)