Fix test port conflicts: use unique ports for each test class

- test_server.py: use port 12102
- test_partner.py: use port 12103

This prevents "Address already in use" errors when tests run sequentially.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: gijzelaerr

tests/test_partner.py

@@ -14,6 +14,8 @@
 class TestPartner(unittest.TestCase):
     def setUp(self) -> None:
         self.partner = snap7.partner.Partner()
+        self.partner.port = 12103  # Use unique port for partner tests
+        self.partner.remote_port = 12103
         self.partner.start()
 
     def tearDown(self) -> None:
@@ -48,7 +50,7 @@ def test_get_last_error(self) -> None:
     def test_get_param(self) -> None:
         expected = (
             (Parameter.LocalPort, 0),
-            (Parameter.RemotePort, 1102),  # Non-privileged port
+            (Parameter.RemotePort, 12103),  # Non-privileged port for tests
             (Parameter.PingTimeout, 750),
             (Parameter.SendTimeout, 10),
             (Parameter.RecvTimeout, 3000),

tests/test_server.py

@@ -16,7 +16,7 @@
 class TestServer(unittest.TestCase):
     def setUp(self) -> None:
         self.server = Server()
-        self.server.start(tcp_port=1102)
+        self.server.start(tcp_port=12102)  # Use unique port for server tests
 
     def tearDown(self) -> None:
         self.server.stop()
@@ -120,7 +120,7 @@ def test_start_to(self) -> None:
 
     def test_get_param(self) -> None:
         # check the defaults
-        self.assertEqual(self.server.get_param(Parameter.LocalPort), 1102)
+        self.assertEqual(self.server.get_param(Parameter.LocalPort), 12102)
         self.assertEqual(self.server.get_param(Parameter.WorkInterval), 100)
         self.assertEqual(self.server.get_param(Parameter.MaxClients), 1024)