Added test for NewDocumentFromResponse with nil response
Added test for NewDocumentFromResponse with nil response

qida/goquery,zhangheli/goquery,treejames/goquery,daemonchen/goquery,zhangheli/goquery,daemonchen/goquery,yinzhiqiang/goquery,mantyr/goquery,PuerkitoBio/goquery,ASAPPinc/goquery,jjz/goquery,cmars/tools,yinzhiqiang/goquery,treejames/goquery,treejames/goquery,legendtkl/goquery,ASAPPinc/goquery,yinzhiqiang/goquery,PuerkitoBio/goquery,jjz/goquery,legendtkl/goquery,legendtkl/goquery,tjyang/goquery,daemonchen/goquery,jjz/goquery,zhangheli/goquery,qida/goquery,ASAPPinc/goquery,cmars/tools,qida/goquery,cmars/tools,tjyang/goquery,tjyang/goquery,cmars/tools,mantyr/goquery