JqueryMsg tests were not preset in QunitTestResources.
'tests/qunit/suites/resources/mediawiki/mediawiki.user.test.js',
'tests/qunit/suites/resources/mediawiki/mediawiki.util.test.js',
'tests/qunit/suites/resources/mediawiki.special/mediawiki.special.recentchanges.test.js',
+ "tests/qunit/suites/resources/mediawiki/mediawiki.jqueryMsg.test.js",
),
'dependencies' => array(
'jquery.autoEllipsis',
'mediawiki.user',
'mediawiki.util',
'mediawiki.special.recentchanges',
+ 'mediawiki.jqueryMsg',
),
)
);