Tried different way of mocking the main 'ISPyBSession' object

Author: tieneupin

tests/workflows/clem/test_register_preprocessing_results.py

@@ -188,8 +188,12 @@ def test_run_with_db(
     mock_get_security_config = mocker.patch("murfey.server.ispyb.get_security_config")
     mock_get_security_config.return_value = mock_security_config
 
-    mock_ispyb_sessionmaker = mocker.patch("murfey.server.ispyb.sessionmaker")
-    mock_ispyb_sessionmaker.return_value.return_value = ispyb_db_session
+    mock_ispyb_session_factory = MagicMock(return_value=ispyb_db_session)
+    mock_ispyb_session_factory.return_value = ispyb_db_session
+    # mock_ispyb_sessionmaker = mocker.patch(
+    mocker.patch(
+        "murfey.server.ispyb.sessionmaker", return_value=mock_ispyb_session_factory
+    )
 
     # Mock the ISPYB connection when registering data collection group
     mocker.patch(