def test_change_speed_halves_playback_speed():
expected_output = np.genfromtxt(
'tests/data/change_speed/bark_half_speed.csv', dtype='float32')
output_signal = change_speed(input_signal, 0.5)
# Mean squared error between input and output signal
mse = ((expected_output - output_signal)**2).mean(axis=0)
print(mse)
assert mse < 0.00001, "Output does not match test data!"
def test_zero_rate_raises_error():
with pytest.raises(Exception):
change_speed(input_signal, 0)
def test_unsupported_input_signal_type_raises_error():
with pytest.raises(Exception):
change_speed(np.array(['1', '2', '3']), 1.5)
def test_negative_rate_raises_error():
with pytest.raises(Exception):
change_speed(input_signal, -1)
def test_change_speed_doubles_playback_speed():
expected_output = np.genfromtxt('data/change_speed/bark_double_speed.csv',
dtype='float32')
output_signal = change_speed(input_signal, 2.0)
assert np.array_equal(output_signal, expected_output)