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2 import signal_processing as sp
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3 import numpy as np
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4
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5 def test_rms():
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6 assert sp.rms([1,1,1]) == 1.0
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7 assert sp.rms([0.5,-0.5]) == 0.5
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8 assert sp.rms([0,0,0,0]) == 0.0
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9 assert sp.rms([5]) == 5.0
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10 assert abs(sp.rms([1,2,-2]) - np.sqrt(3.0)) < 0.000001
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11
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12 def test_autocorrelation():
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13 samples = [1,0,0,1,0,0,1,0,0,1,0,0,1,0,0]
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14 acf = sp.autocorrelation(samples)
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15 assert len(acf) == len(samples)
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16 assert np.argmax(acf) == 0
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17 assert acf[3] > acf[2]
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18 assert acf[3] > acf[4]
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19
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20 def test_bpm_lag_conversions():
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21 assert sp.bpm_to_lag(60, 1) == 1
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22 assert sp.bpm_to_lag(60, 120) == 120
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23 assert sp.bpm_to_lag(30, 120) == 240
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24 assert sp.bpm_to_lag(120, 1) == 0 # should be an integer
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25 assert sp.lag_to_bpm(120, 120) == 60.0
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26 assert sp.lag_to_bpm(60, 120) == 120.0
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27 assert sp.lag_to_bpm(80, 6) == 4.5
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