Test page for different responsive ad implementations via Google DFP.
This ad unit will display different wide ads based on viewport size. On resize of the viewport it will refresh.
This ad unit will show either 300×250 or 336×280 depending on size. On small viewport (< 470px) the ad will disappear.
The adslot has
setCollapseEmptyDiv(true) applied to it, and has a mapping for which we have not line items set for it.