Compile all files so that the test can sue js files. Should be revised later. 
Compile all files so that the test can sue js files. Should be revised later. 
vega/vega-lite,uwdata/vega-lite,uwdata/vega-lite,vega/vega-lite,vega/vega-lite,uwdata/vega-lite,vega/vega-lite,uwdata/vega-lite,uwdata/vega-lite,vega/vega-lite