Fix incorrect split of a tracklist by medium for the case of
two-sided mediums (#2887).
Following the discussion in #2887, the 'medium_total' value should
contain the number of tracks on the medium to which each particular
track belongs, not the total number of different mediums present on
a release.
Fix unit tests accordingly.
Modify the coalescing of subtracks by taking into account the subindices
of the subtracks for deciding if they represent "logical" tracks
(merging them into one single track, as previously) or if they represent
physical tracks (treating them as individual tracks).
Add unit tests for nested logical/physical subtracks, and disc titles.
Add extra checks for the presence of specific field (artists, title,
id, tracklist) when parsing a Release from discogs, failing gracefully
if the fields could not be found.
Add a test for releases without required fields.
Improve the robustness of `get_album_info()` by preferring the use of
`get()` over accesing the dictionary keys directly for several fields,
plus adding extra checks for fields that depend on nested containers on
the Release data.
Add a test for parsing a release that contains a minimal amount of
fields.
This was a vestige from when we used to need the unittest2 library for pre-2.7
compatibility. Now that we require Python 2.7, we aren't using that library
and this indirection wasn't doing any good.
Add three tests for the setting of tracks' medium and medium_total on
the discogs plugin. test_parse_medium_numbers_single_medium is meant
to fail due to #587.
Modify coalesce_tracks() in order to handle the case where subtracks
are defined inside an index track (as `sub_tracks` attribute),
reorganizing the if logic to avoid duplicated code.
Add a try..catch block enclosing the call to clean_tracklist, as a
measure for avoiding side effects (and reverting to just parsing the
raw_list if there are any problems).
Revise the regular expression used for extracting information from a
discogs position, making the subtrack_index only be matched if one of
the other groups is matched as well. Split the definition into several
lines in order to try to document it a bit more clearly.
Add unit tests for position parsing and non standard positions.
Fix the underscore on tox dependency.
Add a first skeleton for providing unit tests for the discogs plugin,
heavily inspired by test_mb, which adds a couple of method for creating
very simple and not comprehensive Bags that mimic discogs_client.Release
and discogs_client.Track.
Add a test for checking the problem of setting media for the Tracks.
