forked from 170010011/fr
78 lines
2.2 KiB
Python
78 lines
2.2 KiB
Python
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import os
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import numpy as np
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from numpy.testing import assert_allclose, assert_raises, assert_
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import pywt.data
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data_dir = os.path.join(os.path.dirname(__file__), 'data')
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wavelab_data_file = os.path.join(data_dir, 'wavelab_test_signals.npz')
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wavelab_result_dict = np.load(wavelab_data_file)
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def test_data_aero():
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aero = pywt.data.aero()
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ref = np.array([[178, 178, 179],
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[170, 173, 171],
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[185, 174, 171]])
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assert_allclose(aero[:3, :3], ref)
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def test_data_ascent():
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ascent = pywt.data.ascent()
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ref = np.array([[83, 83, 83],
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[82, 82, 83],
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[80, 81, 83]])
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assert_allclose(ascent[:3, :3], ref)
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def test_data_camera():
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ascent = pywt.data.camera()
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ref = np.array([[156, 157, 160],
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[156, 157, 159],
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[158, 157, 156]])
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assert_allclose(ascent[:3, :3], ref)
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def test_data_ecg():
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ecg = pywt.data.ecg()
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ref = np.array([-86, -87, -87])
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assert_allclose(ecg[:3], ref)
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def test_wavelab_signals():
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"""Comparison with results generated using WaveLab"""
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rtol = atol = 1e-12
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# get a list of the available signals
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available_signals = pywt.data.demo_signal('list')
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assert_('Doppler' in available_signals)
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for signal in available_signals:
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# reference dictionary has lowercase names for the keys
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key = signal.replace('-', '_').lower()
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val = wavelab_result_dict[key]
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if key in ['gabor', 'sineoneoverx']:
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# these functions do not allow a size to be provided
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assert_allclose(val, pywt.data.demo_signal(signal),
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rtol=rtol, atol=atol)
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assert_raises(ValueError, pywt.data.demo_signal, key, val.size)
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else:
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assert_allclose(val, pywt.data.demo_signal(signal, val.size),
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rtol=rtol, atol=atol)
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# these functions require a size to be provided
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assert_raises(ValueError, pywt.data.demo_signal, key)
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# ValueError on unrecognized signal type
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assert_raises(ValueError, pywt.data.demo_signal, 'unknown_signal', 512)
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# ValueError on invalid length
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assert_raises(ValueError, pywt.data.demo_signal, 'Doppler', 0)
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