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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() | ||