Port regression test 310 to Pytests

testsuite/pytests/sli2py_regressions/test_ticket_310.py

@@ -0,0 +1,71 @@
+# -*- coding: utf-8 -*-
+#
+# test_ticket_310.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
+0  # 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
+
+#  Models to skip to do given reasons
+skip_list = [
+    "correlospinmatrix_detector",  # not a neuron
+    "eprop_iaf_bsshslm_2020",  # no ArchivingNode, thus no t_spike
+    "eprop_iaf_adapt_bsshslm_2020",  # no ArchivingNode, thus no t_spike
+    "eprop_readout_bsshslm_2020",  # no ArchivingNode, thus no t_spike
+    "eprop_iaf",  # no ArchivingNode, thus no t_spike
+    "eprop_iaf_adapt",  # no ArchivingNode, thus no t_spike
+    "eprop_iaf_psc_delta",  # no ArchivingNode, thus no t_spike
+    "eprop_iaf_psc_delta_adapt",  # no ArchivingNode, thus no t_spike
+    "eprop_readout",  # no ArchivingNode, thus no t_spike
+    "iaf_chxk_2008",  # non-standard spiking conditions
+    "izhikevich",  # generating output spike not reliably suppressed even for subthreshold V_m
+]
+
+
+def has_Vm_and_Vth(model):
+    params = nest.GetDefaults(model)
+    return "V_m" in params and "V_th" in params
+
+
+relevant_models = [model for model in nest.node_models if model not in skip_list and has_Vm_and_Vth(model)]
+
+
+@pytest.mark.parametrize("model", relevant_models)
+def test_ticket_310(model):
+    """
+    Regression test for Ticket #310.
+
+    Ensure that all neuron models that have V_m and V_th permit
+    V_m to be set to >= V_th, and that they emit a spike with
+    time stamp == resolution in that case.
+
+    Author: Hans Ekkehard Plesser, 2009-02-11
+    """
+
+    time_resolution = 2**-3  # Use power-of-two resolution to avoid round-off problems
+
+    nest.ResetKernel()
+    nest.resolution = time_resolution
+
+    nrn = nest.Create(model)
+    nrn.V_m = nrn.V_th + 15
+
+    nest.Simulate(time_resolution)
+
+    assert 0 < nrn.t_spike <= time_resolution  # for precise neurons, < is possible; -1 if never spiked