ref: af3cfb3c0017b3dcd370a983d6ec421a20e65ae1
dir: /python/tests/test_zero_crossing_rate.py.old/
from aubio import zero_crossing_rate #! /usr/bin/env python from numpy.testing import TestCase buf_size = 2048 channels = 1 class zero_crossing_rate_test_case(TestCase): def setUp(self): self.vector = new_fvec(buf_size, channels) def tearDown(self): del_fvec(self.vector) def test(self): """ create and delete fvec """ pass 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. """ for index in range(buf_size): for channel in range(channels): fvec_write_sample(self.vector, 1., channel, index) self.assertEqual(0., zero_crossing_rate(self.vector)) def test_impulse(self): """ check zero crossing rate on a buffer with an impulse """ fvec_write_sample(self.vector, 1., 0, buf_size / 2) self.assertEqual(0., zero_crossing_rate(self.vector)) def test_negative_impulse(self): """ check zero crossing rate on a buffer with a negative impulse """ fvec_write_sample(self.vector, -1., 0, buf_size / 2) self.assertEqual(2./buf_size, zero_crossing_rate(self.vector)) def test_single(self): """ check zero crossing rate on single crossing """ fvec_write_sample(self.vector, +1., 0, buf_size / 2 - 1) fvec_write_sample(self.vector, -1., 0, buf_size / 2) 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""" fvec_write_sample(self.vector, +1., 0, buf_size / 2 - 2) fvec_write_sample(self.vector, -1., 0, buf_size / 2) self.assertEqual(2./buf_size, zero_crossing_rate(self.vector)) if __name__ == '__main__': unittest.main()