SIENTIAPDE-1811

Enhance OPC UA testing framework and documentation

- Added a new marker in pyproject.toml for tests using the in-process OPC UA server.
- Updated opc-communication.md to clarify E2E test scenarios involving the real OPC server and mock server.
- Introduced an in-process asyncua OPC UA server fixture in conftest.py for E2E tests.
- Created a new fixture for activities using the real OpcRepository connected to the in-process server.
- Updated scenarios.md to include instructions for running OPC real-server tests.

e2e/conftest.py

@@ -21,6 +21,7 @@ from testcontainers.postgres import PostgresContainer
 from temporalio.testing import WorkflowEnvironment
 from temporalio.worker import Worker
 
+from e2e.opc_test_server import OpcE2ETestServer
 from laborious.activities.activities import Activities
 from laborious.workflows.predictions_batch import PredictionsBatch
 from laborious.workflows.sub_workflows.prediction_process import PredictionProcess
@@ -304,6 +305,19 @@ def mock_opc_repository():
     mock_repo.disconnect = AsyncMock()
     return mock_repo
 
+
+@pytest_asyncio.fixture
+async def opc_e2e_server():
+    """
+    In-process asyncua OPC UA server for E2E tests against OpcRepository.
+    """
+    server = OpcE2ETestServer()
+    await server.start()
+    try:
+        yield server
+    finally:
+        await server.stop()
+
 @pytest_asyncio.fixture
 def patch_create_engine(postgres_engine):
     """Patch create_engine to return test postgres_engine."""
@@ -584,3 +598,84 @@ async def temporal_worker_real_minio(temporal_test_env, test_activities_real_min
         activities=_worker_activity_list(test_activities_real_minio),
     ) as worker:
         yield worker
+
+
+@pytest_asyncio.fixture(scope='function')
+async def test_activities_real_opc(
+    postgres_engine,
+    postgres_container,
+    opc_e2e_server: OpcE2ETestServer,
+    mock_logger,
+    notification_handler,
+    metrics_controller,
+    patch_create_engine,
+    patch_minio_repository,
+    patch_mlflow,
+    patch_pi_web_api_repository,
+):
+    """
+    Activities with a real OpcRepository connected to the in-process OPC UA server.
+    """
+    activities = Activities(
+        postgres_config={
+            'host': 'localhost',
+            'port': postgres_container.get_exposed_port(5432),
+            'user': 'test',
+            'password': 'test',
+            'dbname': 'test',
+            'min_connections': 1,
+            'max_connections': 5,
+        },
+        mlflow_config={
+            'host': 'http://localhost',
+            'port': '5000',
+            'username': 'test',
+            'password': 'test',
+        },
+        minio_config={
+            'endpoint_url': 'localhost:9000',
+            'access_key': 'test',
+            'secret_key': 'test',
+            'default_bucket': 'test-bucket',
+            'retention_hours': 24,
+            'secure': False,
+        },
+        opc_config={
+            '1': {
+                'id': '1',
+                'server_name': 'e2e-opc',
+                'url': opc_e2e_server.url,
+                'server_uri': opc_e2e_server.url,
+                'cert_path': None,
+                'private_key_path': None,
+                'server_cert_path': None,
+                'reconnection_interval': 0,
+            }
+        },
+        pi_web_api_config={
+            'base_url': 'http://localhost:8080',
+            'auth_type': 'bearer',
+            'auth_token': 'test_token',
+        },
+        logger=mock_logger,
+        notification_handler=notification_handler,
+    )
+    await activities.init_opc()
+    repo = activities.opc_repository['1']
+    assert repo._session_ready.is_set(), 'OPC E2E server connection failed during init_opc'
+    try:
+        yield activities
+    finally:
+        await activities.shutdown()
+
+
+@pytest_asyncio.fixture(scope='function')
+async def temporal_worker_real_opc(temporal_test_env, test_activities_real_opc):
+    """Temporal worker backed by Activities using the in-process OPC UA server."""
+    async with Worker(
+        temporal_test_env.client,
+        task_queue='test-queue',
+        workflows=[PredictionsBatch, PredictionProcess, FormatAndExportPrediction],
+        activities=_worker_activity_list(test_activities_real_opc),
+    ) as worker:
+        yield worker