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Merge pull request #2815 from nicolossus/port_test_pulsepacket_generator
Port `test_pulsepacket_generator` from SLI-2-Py
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testsuite/pytests/sli2py_stimulating/test_pulsepacket_generator.py
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| # -*- coding: utf-8 -*- | ||
| # | ||
| # test_pulsepacket_generator.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/>. | ||
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| """ | ||
| Test parameter setting and correct number of spikes emitted by `pulsepacket_generator`. | ||
| """ | ||
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| import numpy as np | ||
| import pandas as pd | ||
| import pandas.testing as pdtest | ||
| import pytest | ||
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| import nest | ||
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| @pytest.fixture(autouse=True) | ||
| def reset(): | ||
| nest.ResetKernel() | ||
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| def test_set_params_on_instance_and_model(): | ||
| """ | ||
| Test setting `pulsepacket_generator` parameters on instance and model. | ||
| """ | ||
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| params = {"pulse_times": [1.0, 2.5, 4.6], "activity": 150, "sdev": 0.1234} | ||
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| # Set params on instance | ||
| ppg1 = nest.Create("pulsepacket_generator") | ||
| ppg1.set(params) | ||
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| # Set params on model | ||
| nest.SetDefaults("pulsepacket_generator", params) | ||
| ppg2 = nest.Create("pulsepacket_generator") | ||
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| # Verify that both ways to set params give same result | ||
| df_pgg1 = pd.DataFrame.from_dict(ppg1.get(params.keys())) | ||
| df_pgg2 = pd.DataFrame.from_dict(ppg2.get(params.keys())) | ||
| pdtest.assert_frame_equal(df_pgg1, df_pgg2) | ||
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| @pytest.mark.parametrize("params", [{"sdev": -5.0}, {"activity": -5}]) | ||
| def test_set_illegal_values(params): | ||
| """ | ||
| Test that an error is raised if `sdev` or `activity` is set to negative value. | ||
| """ | ||
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| with pytest.raises(nest.kernel.NESTErrors.BadProperty): | ||
| nest.SetDefaults("pulsepacket_generator", params) | ||
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| def test_valid_to_pass_empty_pulse_times(): | ||
| """ | ||
| Assure that a `pulsepacket_generator` with empty `pulse_times` can be simulated. | ||
| """ | ||
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| params = {"pulse_times": [], "activity": 0, "sdev": 0.0} | ||
| ppg = nest.Create("pulsepacket_generator") | ||
| ppg.set(params) | ||
| nest.Simulate(1.0) | ||
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| def test_number_of_spikes(): | ||
| """ | ||
| Test that `pulsepacket_generator` emits expected number of spikes. | ||
| The test builds and simulates a system with `pulsepacket_generator` | ||
| connected to a `spike_recorder`. The test checks the number of | ||
| recorded spikes against our expectation. | ||
| """ | ||
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| nest.resolution = 0.1 | ||
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| tstart = 75.0 | ||
| tstop = 225.0 | ||
| nspk = 10 | ||
| pulset = np.array([10.0, 125.0, 175.0, 275.0]) | ||
| stddev = 5.0 | ||
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| # Find number of pulse centers in [tstart, tstop] | ||
| npulseff = np.count_nonzero(np.logical_and(pulset >= tstart, pulset <= tstop)) | ||
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| # Since tstart, tstop are far from pulse times, it is highly likely that | ||
| # only spikes belonging to the pulses with centers in [tstart, tstop] are | ||
| # fired and then we get for the total spike number | ||
| npsktot = nspk * npulseff | ||
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| # Build and simulate system | ||
| params = { | ||
| "start": tstart, | ||
| "stop": tstop, | ||
| "pulse_times": pulset, | ||
| "activity": nspk, | ||
| "sdev": stddev, | ||
| } | ||
| ppg = nest.Create("pulsepacket_generator", params) | ||
| sr = nest.Create("spike_recorder") | ||
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| nest.Connect(ppg, sr) | ||
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| nest.Simulate(300.0) | ||
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| actual_spikes = sr.events["times"] | ||
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| # Check that min and max are inside [tstart, tstop] | ||
| assert np.min(actual_spikes) >= tstart | ||
| assert np.max(actual_spikes) <= tstop | ||
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| # Check number of spikes | ||
| assert actual_spikes.size == npsktot |
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