It appears that tests in the library WikibaseDataModelSerialization have been failing for some time now due to out of date dependencies (see original report below). These errors should be fixed, and indications of failing builds should be up to date.

Acceptance Criteria

• Tests pass in WikibaseDataModelSerialization
• Ensure that badges on readme.md are up to date or remove them to prevent misleading potential contributers

Notes:

• The libraries referred to in this ticket are libraries that have been included within Wikibase.git: https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/extensions/Wikibase/+/refs/heads/master/lib/packages/wikibase/

Original Report:

I wanted to work on a PR to address T323618 so I tried:

git clone https://github.com/wmde/WikibaseDataModelSerialization
composer install
composer test

Only to discover that the tests fail with a bunch of Error: Class 'Wikibase\DataModel\Entity\NumericPropertyId' not found errors.

I did some digging and this is apparently because Wikibase-DataModel-Serialization depends on Wikibase-DataModel, where the NumericPropertyId class has been introduced in T289125. However Wikibase-DataModel has not had a release since and Wikibase-DataModel-Serialization has been changed to use the new class in a14086394e8cd813a29ddcae6c9338dc9665a1f3 without updating the wikibase/data-model dependency in composer.json.

So I think a new version of Wikibase-DataModel should be released and the composer.json of Wikibase-DataModel-Serialization should be updated accordingly. I was initially really confused why the README proudly declared "build passing" but apparently the Travis CI is dead, having last run 2 years ago.