ref: 3bf80b9872d63282409dfc876e3dc29140c134ef
dir: /python/tests/test_zero_crossing_rate.py/
#! /usr/bin/env python from numpy.testing import TestCase from aubio import fvec, zero_crossing_rate buf_size = 2048 class zero_crossing_rate_test_case(TestCase): def setUp(self): self.vector = fvec(buf_size) def test_zeroes(self): """ check zero crossing rate on a buffer of 0. """ self.assertEqual(0., zero_crossing_rate(self.vector)) def test_ones(self): """ check zero crossing rate on a buffer of 1. """ self.vector[:] = 1. self.assertEqual(0., zero_crossing_rate(self.vector)) def test_impulse(self): """ check zero crossing rate on a buffer with an impulse """ self.vector[int(buf_size / 2)] = 1. self.assertEqual(0., zero_crossing_rate(self.vector)) def test_negative_impulse(self): """ check zero crossing rate on a buffer with a negative impulse """ self.vector[int(buf_size / 2)] = -1. self.assertEqual(2./buf_size, zero_crossing_rate(self.vector)) def test_single(self): """ check zero crossing rate on single crossing """ self.vector[int(buf_size / 2) - 1] = 1. self.vector[int(buf_size / 2)] = -1. self.assertEqual(2./buf_size, zero_crossing_rate(self.vector)) def test_single_with_gap(self): """ check zero crossing rate on single crossing with a gap""" self.vector[int(buf_size / 2) - 2] = 1. self.vector[int(buf_size / 2)] = -1. self.assertEqual(2./buf_size, zero_crossing_rate(self.vector)) if __name__ == '__main__': from unittest import main main()