add options el tests (#2967)
add options el tests (#2967)

* add options el tests

ref: #2872

* fix error at phantomjs env

optimizely/vue,gebilaoxiong/vue,Hanks10100/vue,xueyaodeai/vue,greennyreborn/vue,posva/vue,Hanks10100/vue,cnchanning/vue,cnchanning/vue,Kingwl/vue,lizhiyao/vue,greennyreborn/vue,leemotive/vue,Kingwl/vue,vuejs/vue,wushuyi/vue,xueyaodeai/vue,KingMario/vue,pramudaprakash/GITHUB,pramudaprakash/GITHUB,wushuyi/vue,Jinjiang/vue,Ddder-FE/vue,posva/vue,posva/vue,posva/vue,cnchanning/vue,Hanks10100/vue,sreesirisha/GITMidtermexam,Jinjiang/vue,Jinjiang/vue,vuejs/vue,lizhiyao/vue,hanhongyuan/vue,KingMario/vue,Kingwl/vue,Hanks10100/vue,xueyaodeai/vue,leemotive/vue,lizhiyao/vue,hanhongyuan/vue,hanhongyuan/vue,hanhongyuan/vue,Ddder-FE/vue,greennyreborn/vue,KingMario/vue,Jinjiang/vue,Kingwl/vue,gebilaoxiong/vue,lizhiyao/vue,Ddder-FE/vue,Ddder-FE/vue,greennyreborn/vue,leemotive/vue,vuejs/vue,sreesirisha/GITMidtermexam,xueyaodeai/vue,sreesirisha/GITMidtermexam,KingMario/vue,pramudaprakash/GITHUB,sreesirisha/GITMidtermexam,vuejs/vue,pramudaprakash/GITHUB,gebilaoxiong/vue,leemotive/vue