tests: add 404 and error handling tests
tests: add 404 and error handling tests

keenwon/connect,behind2/connect,austincitylimits/connect,chinazhaghai/connect,gtomitsuka/connect,wghust/connect,senchalabs/connect,llwanghong/connect,khirayama/connect,lian774739140/connect,khalerc/connect,tanveer12332/connect,dkfiresky/connect,mi2oon/connect,qitianchan/connect,liuwei9413/connect,mi2oon/connect,RoseTHERESA/connect,RickyDan/connect