Since the CI is running mysql in strict mode (T119371) the tests for this extension fails with:
Error: 1067 Invalid default value for 'challenge_accept_date'
The problem is '0000-00-00 00:00:00' as default value on a datetime type.
mediawiki/core is using varchars for timestamps (as done on challenge_event_date)
CREATE TABLE /*_*/challenge ( challenge_id int(11) NOT NULL PRIMARY KEY auto_increment, -- Challenger challenge_user_id_1 int(11) NOT NULL default 0, challenge_username1 varchar(255) NOT NULL default '', -- Challenged challenge_user_id_2 int(11) NOT NULL default 0, challenge_username2 varchar(255) NOT NULL default '', challenge_info varchar(200) NOT NULL default '', challenge_event_date varchar(15) NOT NULL default '0000-00-00', challenge_description text, challenge_win_terms varchar(200) NOT NULL default '', challenge_lose_terms varchar(200) NOT NULL default '', challenge_winner_user_id int(11) NOT NULL default 0, challenge_winner_username varchar(255) NOT NULL default '', challenge_status int(11) NOT NULL default 0, -- The following two fields appear to be currently unused but were used in -- the past by Special:ChallengeAction...the question is: should we drop these -- or bring them back? challenge_accept_date datetime NOT NULL default '0000-00-00 00:00:00', challenge_complete_date datetime NOT NULL default '0000-00-00 00:00:00', challenge_date varbinary(14) NOT NULL default '' )/*$wgDBTableOptions*/;