test: add test cases for category + array target + interval op
test: add test cases for category + array target + interval op

iongroup/plotly.js,plotly/plotly.js,aburato/plotly.js,plotly/plotly.js,etpinard/plotly.js,iongroup/plotly.js,etpinard/plotly.js,asolagmbh/plotly.js,plotly/plotly.js,aburato/plotly.js,iongroup/plotly.js,asolagmbh/plotly.js,plotly/plotly.js,etpinard/plotly.js,asolagmbh/plotly.js