SIENTIAPDE-988

Refactor OpcManager initialization and unsubscribe method; enhance logging

- Removed the `initialize_from_config` method from `OpcManager` class and adjusted the constructor to handle configuration directly.
- Improved the `unsubscribe` method to include detailed logging for non-existent subscriptions.
- Updated tests in `test_opc_manager.py` to reflect changes in the `OpcManager` class.
- Commented out Docker-related fixtures in `conftest.py` for potential future use.
- Enhanced test coverage in `test_single_node.py` and `test_data_manager.py` with additional scenarios and assertions.
- Introduced new methods in `Ingestor` and `IngestorManager` classes to manage server subscriptions and leases more effectively.
- Added new tests for `Ingestor` class to validate initialization and slot management logic.
- Implemented logging improvements across various classes to ensure better traceability of actions and errors.

tests/unit/managers/test_opc_manager.py

@@ -1,4 +1,5 @@
 import json
+from datetime import datetime
 from unittest.mock import MagicMock, patch
 from pytest import fixture
 
@@ -56,6 +57,10 @@ def opc_manager_subscribed(opc_manager):
     return opc_manager
 
 
+def test___str__(opc_manager):
+    assert str(opc_manager) == 'OpcManager(name=TestConnector, url=opc.tcp://localhost:4840, server_uri=opc.tcp://localhost:4840)\nnodes={}, subscriptions={}'
+
+
 def test_set_security_success(opc_manager):
     opc_manager.set_security()
 
@@ -160,13 +165,11 @@ def test_subscribe_success(opc_manager_subscribed):
 
 
 def test_unsubscribe_no_subscription(opc_manager):
-    try:
-        opc_manager.unsubscribe('sub1')
-    except ValueError as e:
-        assert str(
-            e) == "Subscription not created. Call create_subscription first."
-    else:
-        assert False, "ValueError not raised"
+    opc_manager.unsubscribe('sub1')
+
+    opc_manager.logger.warning.assert_called_once_with(
+        "Subscription 'sub1' not found. Cannot unsubscribe.")
+    assert opc_manager.subscriptions.get('sub1') is None
 
 
 def test_unsubscribe_success(opc_manager_subscribed):
@@ -181,7 +184,7 @@ def test_disconnect_success(opc_manager_subscribed):
     opc_manager_subscribed.disconnect()
 
     opc_manager_subscribed.subscriptions['sub1'].delete.assert_called_once()
-    opc_manager_subscribed.client.disconnect.assert_called_once()
+    assert opc_manager_subscribed.client is None
 
 
 def test_disconnect_error(opc_manager_subscribed):
@@ -203,8 +206,8 @@ def test_datachange_notification(opc_manager_subscribed):
         monitored_item=MagicMock(
             Value=MagicMock(
                 Value=MagicMock(Value=42),
-                SourceTimestamp='2021-01-01T00:00:00'
-
+                SourceTimestamp=datetime.strptime(
+                    '2021-01-01T00:00:00', '%Y-%m-%dT%H:%M:%S')
             )))
     opc_manager_subscribed.nodes = {
         'ns=3;i=1001': {
@@ -224,14 +227,14 @@ def test_datachange_notification(opc_manager_subscribed):
         'topic1', {
             'tag': 'ns=3;i=1001',
             'name': 'Counter',
-            'timestamp': '2021-01-01T00:00:00',
+            'timestamp': '2021-01-01 00:00:00',
             'value': 42
         })
     opc_manager_subscribed.data_manager.publish.assert_any_call(
         'topic2', {
             'tag': 'ns=3;i=1001',
             'name': 'Counter',
-            'timestamp': '2021-01-01T00:00:00',
+            'timestamp': '2021-01-01 00:00:00',
             'value': 42
         })
     assert opc_manager_subscribed.nodes['ns=3;i=1001']['cycle_rule']['cycle_count'] == 0