Merge pull request #2772 from nicolossus/port_test_issue_105

Port `issue-105.sli` to Pytest

testsuite/pytests/sli2py_regressions/test_issue_105.py

@@ -0,0 +1,132 @@
+# -*- coding: utf-8 -*-
+#
+# test_issue_105.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/>.
+
+"""
+Regression test for Issue #105 (GitHub).
+"""
+
+import pytest
+
+import nest
+
+
+@pytest.fixture(autouse=True)
+def set_resolution():
+    nest.ResetKernel()
+    nest.resolution = 0.1
+
+
+@pytest.mark.parametrize("delay", [0.81, 0.82, 0.8499])
+def test_min_delay_on_fresh_connection(delay):
+    """
+    Ensure that NEST sets `min_delay` correctly from delay in `syn_spec`.
+
+    This test ensures that `min_delay` is set correctly for delays
+    that are not multiples of the resolution.
+    """
+
+    nrn = nest.Create("iaf_psc_alpha")
+    conn = nest.Connect(nrn, nrn, "one_to_one", {"delay": delay}, return_synapsecollection=True)
+
+    expected_delay = 0.8
+    assert conn.delay == expected_delay
+    assert nest.min_delay == expected_delay
+
+
+@pytest.mark.parametrize("delay", [0.81, 0.82, 0.8499])
+def test_min_delay_on_synapsecollection_set(delay):
+    """
+    Ensure that NEST sets `min_delay` correctly on `SynapseCollection` set.
+
+    This test ensures that `min_delay` is set correctly for delays
+    that are not multiples of the resolution.
+    """
+
+    nrn = nest.Create("iaf_psc_alpha")
+    conn = nest.Connect(nrn, nrn, "one_to_one", return_synapsecollection=True)
+    conn.delay = delay
+
+    expected_delay = 0.8
+    assert conn.delay == expected_delay
+    assert nest.min_delay == expected_delay
+
+
+@pytest.mark.parametrize("delay", [0.85, 0.86, 0.8999])
+def test_max_delay_on_fresh_connection(delay):
+    """
+    Ensure that NEST sets `max_delay` correctly from delay in `syn_spec`.
+
+    This test ensures that `max_delay` is set correctly for delays
+    that are not multiples of the resolution.
+    """
+
+    nrn = nest.Create("iaf_psc_alpha")
+    conn = nest.Connect(nrn, nrn, "one_to_one", {"delay": delay}, return_synapsecollection=True)
+
+    expected_delay = 0.9
+    assert conn.delay == expected_delay
+    assert nest.max_delay == expected_delay
+
+
+@pytest.mark.parametrize("delay", [1.95, 1.96, 1.999])
+def test_max_delay_on_synapsecollection_set(delay):
+    """
+    Ensure that NEST sets `max_delay` correctly on `SynapseCollection` set.
+
+    This test ensures that `max_delay` is set correctly for delays
+    that are not multiples of the resolution.
+    """
+
+    nrn = nest.Create("iaf_psc_alpha")
+    conn = nest.Connect(nrn, nrn, "one_to_one", return_synapsecollection=True)
+    conn.delay = delay
+
+    expected_delay = 2.0
+    assert conn.delay == expected_delay
+    assert nest.max_delay == expected_delay
+
+
+@pytest.mark.parametrize("min_delay", [0.81, 0.89])
+def test_min_and_max_delay_on_set_kernel_status(min_delay):
+    """
+    Test setting `min_delay` and `max_delay` on kernel set.
+
+    Test that setting `min_delay` and `max_delay` works so that setting certain
+    min/max values will allow those values to be used in subsequent connections.
+    Note that effects can only be seen in the kernel status after a connection
+    has been created.
+
+    We expect that both `min_delay` values are rounded to 0.8 and the
+    `max_delay` value is rounded to 1.5.
+    """
+
+    max_delay = 1.49
+
+    nest.set(min_delay=min_delay, max_delay=max_delay)
+
+    nrn = nest.Create("iaf_psc_alpha")
+    nest.Connect(nrn, nrn, "one_to_one", {"delay": min_delay})
+    nest.Connect(nrn, nrn, "one_to_one", {"delay": max_delay})
+
+    expected_min_delay = 0.8
+    expected_max_delay = 1.5
+    assert nest.min_delay == expected_min_delay
+    assert nest.max_delay == expected_max_delay