// Small synthetic smoke test; supply upstream tests separately for a full run.
checkPublicSuffix('example.com', 'example.com');
checkPublicSuffix('com', null);
checkPublicSuffix('a.b.test.ck', 'b.test.ck');
checkPublicSuffix('www.www.ck', 'www.ck');
checkPublicSuffix('商店.公司.cn', '商店.公司.cn');
