In https://github.com/wikimedia/mediawiki-extensions-CommunityConfiguration/commit/336a5da19da807fe0675f215ddf9f55265e28954, we added the Loader class, mostly taken from WikiPageConfigLoader as used in GrowthExperiments. That commit, however, did not transfer WikiPageConfigLoaderTest. To ensure a reasonable test coverage of the newly created CommunityConfiguration extension, we should add a LoaderTest as well.

Acceptance Criteria

• The Loader class of CommunityConfiguration has reasonable unit test coverage