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| 1 | +#! /usr/bin/env python | |
| 2 | + | |
| 3 | +import numpy as np | |
| 4 | +from numpy.testing import TestCase, assert_equal | |
| 5 | +import aubio | |
| 6 | + | |
| 7 | +class aubio_shift_test_case(TestCase): | |
| 8 | + | |
| 9 | + def run_shift_ishift(self, n): | |
| 10 | + ramp = np.arange(n, dtype=aubio.float_type) | |
| 11 | + # construct expected output | |
| 12 | + # even length: [5. 6. 7. 8. 9. 0. 1. 2. 3. 4.] | |
| 13 | + # odd length: [4. 5. 6. 0. 1. 2. 3.] | |
| 14 | + half = n - n//2 | |
| 15 | + expected = np.concatenate([np.arange(half, n), np.arange(half)]) | |
| 16 | + # shift in place, returns modified copy | |
| 17 | + assert_equal(aubio.shift(ramp), expected) | |
| 18 | + # check input was changed as expected | |
| 19 | + assert_equal(ramp, expected) | |
| 20 | + # construct expected output | |
| 21 | + expected = np.arange(n) | |
| 22 | + # revert shift in place, returns modifed copy | |
| 23 | + assert_equal(aubio.ishift(ramp), expected) | |
| 24 | + # check input was shifted back | |
| 25 | + assert_equal(ramp, expected) | |
| 26 | + | |
| 27 | + def test_can_shift_fvec(self): | |
| 28 | + self.run_shift_ishift(10) | |
| 29 | + | |
| 30 | + def test_can_shift_fvec_odd(self): | |
| 31 | + self.run_shift_ishift(7) | |
| 32 | + | |
| 33 | +from unittest import main | |
| 34 | +if __name__ == '__main__': | |
| 35 | + main() | |