Added functionality: Tests can be created via check()
Added functionality: Tests can be created via check()

birtles/web-animations-js,birtles/web-animations-js,beni55/web-animations-js-legacy,beni55/web-animations-js-legacy,web-animations/web-animations-js-legacy,dstockwell/web-animations-js,birtles/web-animations-js,beni55/web-animations-js-legacy,beni55/web-animations-js-legacy,web-animations/web-animations-js-legacy,web-animations/web-animations-js-legacy,dstockwell/web-animations-js