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For MusicBrainz Picard, prepare tests for 3 functions that do not already have tests available. Possible candidates can be found in dataobj.py and in the util files.

To avoid duplication, please notify your mentor as soon as you have selected the functions for which you will be providing tests.

Once completed, submit a pull request with your changes to the Picard repository on GitHub, and respond to any suggestions and requests by the Picard developers until the pull request is approved (you do not need to wait until it gets merged). The pull request should reference tracking ticket PICARD-862.