added test for new dataset.api
added test for new dataset.api

elaOnMars/datawrapper,qqming113/datawrapper,robmcloughlin/Insights,elaOnMars/datawrapper,grepman/datawrapper,washingtonpost/datawrapper,datafunk/datawrapper,qqming113/datawrapper,grepman/datawrapper,kendrick-k/datawrapper,elaOnMars/datawrapper,elaOnMars/datawrapper,motherjones/datawrapper,ThuyNTran/datawrapper,grepman/datawrapper,kendrick-k/datawrapper,motherjones/datawrapper,motherjones/datawrapper,rubensfernando/datawrapper,devinit/datawrapper,robmcloughlin/Insights,kendrick-k/datawrapper,qqming113/datawrapper,grepman/datawrapper,robmcloughlin/Insights,washingtonpost/datawrapper,qqming113/datawrapper,qqming113/datawrapper,ThuyNTran/datawrapper,grepman/datawrapper,motherjones/datawrapper,kendrick-k/datawrapper,datafunk/datawrapper,elaOnMars/datawrapper,rubensfernando/datawrapper,elaOnMars/datawrapper,devinit/datawrapper,ThuyNTran/datawrapper,datafunk/datawrapper,devinit/datawrapper,motherjones/datawrapper,motherjones/datawrapper,ThuyNTran/datawrapper,datafunk/datawrapper,kendrick-k/datawrapper,qqming113/datawrapper,robmcloughlin/Insights,robmcloughlin/Insights,grepman/datawrapper,ThuyNTran/datawrapper,datafunk/datawrapper,plusgut/datawrapper,washingtonpost/datawrapper,devinit/datawrapper,plusgut/datawrapper,ThuyNTran/datawrapper,rubensfernando/datawrapper,washingtonpost/datawrapper,plusgut/datawrapper,devinit/datawrapper,datafunk/datawrapper,kendrick-k/datawrapper,washingtonpost/datawrapper,plusgut/datawrapper,washingtonpost/datawrapper,rubensfernando/datawrapper,devinit/datawrapper,rubensfernando/datawrapper