Merge pull request #2806 from nicolossus/port_issue_1305

Port `issue-1305.sli` to Pytest

testsuite/pytests/sli2py_regressions/test_issue_1305.py

@@ -0,0 +1,54 @@
+# -*- coding: utf-8 -*-
+#
+# test_issue_1305.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 #1305 (GitHub).
+
+This set of tests ensures that NEST can set small resolutions and deals with
+rounding errors correctly.
+"""
+
+import pytest
+
+import nest
+
+
+@pytest.fixture(autouse=True)
+def reset():
+    nest.ResetKernel()
+
+
+def test_resolution_rounding_valid():
+    """Test setting valid resolution."""
+
+    target_resolution = 0.102
+    nest.set(resolution=target_resolution, tics_per_ms=1000.0)
+
+    assert nest.resolution == pytest.approx(target_resolution)
+
+
+def test_resolution_rounding_invalid():
+    """Test setting invalid resolution."""
+
+    target_resolution = 0.1002
+
+    with pytest.raises(nest.kernel.NESTError):
+        nest.set(resolution=target_resolution, tics_per_ms=1000.0)