Port regression test 464 to Pytests

testsuite/pytests/sli2py_regressions/test_ticket_464.py

@@ -0,0 +1,70 @@
+# -*- coding: utf-8 -*-
+#
+# test_ticket_464.py
+#
+# This file is part of NEST.
+#
+# Copyright (C) 2004 The NEST Initiative
+#
+# NEST is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 2 of the License, or
+# (at your option) any later version.
+#
+# NEST is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with NEST.  If not, see <http://www.gnu.org/licenses/>.
+import nest
+import pytest
+
+
+# Placeholder decorator to simulate MPI check
+def skip_if_have_mpi(func):
+    try:
+        # Simulates checking for MPI (not directly feasible in Python)
+        import MPI
+
+        return pytest.mark.skip(reason="Test skipped if NEST has MPI support")(func)
+    except ImportError:
+        return func
+
+
+@skip_if_have_mpi
+def test_ticket_464():
+    """
+    Ensure that NEST triggers an error with a frozen multimeter connected to a node.
+
+    This test has been modified to reflect that NEST now protects multimeter against being frozen.
+    The first test triggers an error instead of an assertion, and crash_or_die has been replaced by fail_or_die.
+
+    Remarks:
+    This test has been modified (2011-02-11) to reflect the fact that NEST now protects
+    multimeter against being frozen. Thus, the first test triggers an error instead of
+    and assertion, and crash_or_die has been replaced by fail_or_die.
+
+    Author: Hans Ekkehard Plesser, 2010-10-04
+    """
+
+    # Test: multimeter frozen, should trigger error
+    nest.ResetKernel()
+    # Attempt to create and freeze a multimeter
+    mm = nest.Create("multimeter", params={"record_from": ["V_m"]})
+    with pytest.raises(Exception):  # Expect an error due to frozen multimeter
+        mm.set(frozen=True)  # Set frozen status
+        iaf_neuron = nest.Create("iaf_psc_alpha")
+        nest.Connect(mm, iaf_neuron)
+        nest.Simulate(3.0)
+
+    # Test: multimeter thawed, should run fine
+    nest.ResetKernel()
+    mm = nest.Create("multimeter", params={"record_from": ["V_m"]})
+    mm.set(frozen=False)  # Ensure multimeter is not frozen
+    iaf_neuron = nest.Create("iaf_psc_alpha")
+    nest.Connect(mm, iaf_neuron)
+    nest.Simulate(3.0)  # Should run without issues
+
+    # If we reach here, the second test has passed