Set allow_version_mismatch to False by default (L1-2561)

src/zhinst/toolkit/session.py

@@ -655,9 +655,10 @@ class Session(Node):
         connection: Existing DAQ server object. If specified the session will
             not create a new session to the data server but reuse the passed
             one. (default = None)
-        allow_version_mismatch: When set to False, an exception will be raised
-            when attempting to connect to a data-server on a different version
-            than that of the zhinst.core library. (default = True)
+        allow_version_mismatch: if set to True, the connection to the data-server
+            will succeed even if the data-server is on a different version of LabOne.
+            If False, an exception will be raised if the data-server is on a
+            different version. (default = False)
 
     .. versionchanged:: 0.7.1
         Added `allow_version_mismatch` argument.
@@ -670,7 +671,7 @@ def __init__(
         *,
         hf2: t.Optional[bool] = None,
         connection: t.Optional[core.ziDAQServer] = None,
-        allow_version_mismatch: bool = True,
+        allow_version_mismatch: bool = False,
     ):
         self._is_hf2_server = bool(hf2)
         if connection is not None:

tests/test_data_server_session.py

@@ -10,7 +10,7 @@
 
 def test_setup(mock_connection, session):
     mock_connection.assert_called_once_with(
-        "localhost", 8004, 6, allow_version_mismatch=True
+        "localhost", 8004, 6, allow_version_mismatch=False
     )
     mock_connection.return_value.listNodesJSON.assert_called_once_with("/zi/*")
     assert repr(session) == "DataServerSession(localhost:8004)"
@@ -21,7 +21,7 @@ def test_setup(mock_connection, session):
 
 def test_setup_hf2(mock_connection, hf2_session):
     mock_connection.assert_called_once_with(
-        "localhost", 8005, 1, allow_version_mismatch=True
+        "localhost", 8005, 1, allow_version_mismatch=False
     )
     mock_connection.return_value.listNodesJSON.assert_not_called()
     assert repr(hf2_session) == "HF2DataServerSession(localhost:8005)"
@@ -39,7 +39,7 @@ def create_daq(*args, **kwargs):
 
     mock_connection.side_effect = create_daq
     Session("localhost", 8004)
-    mock_connection.assert_any_call("localhost", 8004, 6, allow_version_mismatch=True)
+    mock_connection.assert_any_call("localhost", 8004, 6, allow_version_mismatch=False)
     mock_connection.assert_called_with("localhost", 8004, 6)
 
 
@@ -70,7 +70,7 @@ def create_daq(*args, **kwargs):
     mock_connection.side_effect = create_daq
     Session("localhost", 8004)
     mock_connection.assert_called_once_with(
-        "localhost", 8004, 6, allow_version_mismatch=True
+        "localhost", 8004, 6, allow_version_mismatch=False
     )