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Tests
=======
This directory contains compatibility tests for librosa's core features.
The MATLAB script ``makeTestData.m`` generates input/output examples under the ``data/`` directory.
After generating the test data, run ``pytest`` from the top-level source directory to perform tests and verify the outputs.
Note: for testing in isolated environments without network access, you can use ``pytest --librosa-isolation`` to bypass any tests which depend on externally hosted data (example audio files, citation data, etc).
Generating test data
====================
The data files for numerical equivalence tests are generated by the ``makeTestData`` matlab program. This relies on a variety of matlab functions which can be downloaded from the following URLs:
- http://www.ee.columbia.edu/~dpwe/resources/matlab/rastamat/
- http://www.ee.columbia.edu/~dpwe/resources/matlab/chroma-ansyn/
The following [RASTAMAT](http://www.ee.columbia.edu/~dpwe/resources/matlab/rastamat/) functions are required to run the ``makeTestData.m`` matlab program:
- ``mel2hz.m`` http://www.ee.columbia.edu/~dpwe/resources/matlab/rastamat/mel2hz.m
- ``hz2mel.m`` http://www.ee.columbia.edu/~dpwe/resources/matlab/rastamat/hz2mel.m
- ``fft2melmx.m`` http://www.ee.columbia.edu/~dpwe/resources/matlab/rastamat/fft2melmx.m
STFT/ISTFT are compared to those available [here](http://www.ee.columbia.edu/ln/rosa/matlab/pvoc/):
- ``stft.m`` http://www.ee.columbia.edu/ln/rosa/matlab/pvoc/stft.m
- ``istft.m`` http://www.ee.columbia.edu/ln/rosa/matlab/pvoc/istft.m
Beat tracking implementations are provided [here](http://labrosa.ee.columbia.edu/projects/beattrack/):
- ``tempo2.m`` http://labrosa.ee.columbia.edu/projects/beattrack/tempo2.m
- ``beat2.m`` http://labrosa.ee.columbia.edu/projects/beattrack/beat2.m
The [chroma-ansyn](http://www.ee.columbia.edu/~dpwe/resources/matlab/chroma-ansyn/chroma-ansyn.tgz) package provides the remaining functions:
- ``hz2octs.m`` http://www.ee.columbia.edu/~dpwe/resources/matlab/chroma-ansyn/hz2octs.m
- ``ifgram.m`` http://www.ee.columbia.edu/~dpwe/resources/matlab/chroma-ansyn/ifgram.m
- ``fft2chromamx.m`` http://www.ee.columbia.edu/~dpwe/resources/matlab/chroma-ansyn/fft2chromamx.m
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