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test_ds_optzeros.py
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test_ds_optzeros.py
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# -*- coding: utf-8 -*-
# test_ds_optzeros.py
# This module provides the tests for the ds_freq() function.
# Copyright 2014 Giuseppe Venturini & Shayne Hodge
# This file is part of python-deltasigma.
#
# python-deltasigma is a 1:1 Python replacement of Richard Schreier's
# MATLAB delta sigma toolbox (aka "delsigma"), upon which it is heavily based.
# The delta sigma toolbox is (c) 2009, Richard Schreier.
#
# python-deltasigma 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
# LICENSE file for the licensing terms.
import unittest
import numpy as np
import deltasigma as ds
import pkg_resources
import scipy.io
from os.path import join
class TestDSOptZeros(unittest.TestCase):
"""Test function for ds_optzeros()"""
def setUp(self):
file_path = join('test_data', 'test_ds_optzeros.mat')
fname = pkg_resources.resource_filename(__name__, file_path)
self.res = scipy.io.loadmat(fname)['res']
def test_opt_zeros(self):
""" Test 14 different optzeros() calls. """
ns = ('n1', 'n2', 'n3', 'n4', 'n5', 'n6', 'n7', 'n8', 'n9', 'n10',
'n11', 'n12', 'n13', 'n14')
for i, n in enumerate(ns):
for opt in (0, 1, 2):
self.assertTrue(
np.allclose(
self.res[n][0][0][:, opt], ds.ds_optzeros(i+1, opt),
atol=1e-10, rtol=1e-6))