This tests that scrollable areas with the appropriate overflow mode set are in fact scrollable by the user. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS div.scrollTop == window.pixelsPerWheelTick && div.scrollLeft == window.pixelsPerWheelTick became true PASS div.scrollTop == window.pixelsPerWheelTick && div.scrollLeft == window.pixelsPerWheelTick became true PASS div.scrollTop == 0 && div.scrollLeft == 0 became true PASS div.scrollTop == window.pixelsPerWheelTick && div.scrollLeft == window.pixelsPerWheelTick became true PASS div.scrollTop == 0 && div.scrollLeft == 0 became true PASS div.scrollTop == 0 && div.scrollLeft == 0 became true PASS div.scrollTop == 0 && div.scrollLeft == 0 became true PASS div.scrollTop == 0 && div.scrollLeft == 0 became true PASS successfullyParsed is true TEST COMPLETE scroll with overflow Content auto with overflow Content hidden with overflow Content overlay with overflow Content scroll without overflow Content auto without overflow Content hidden without overflow Content overlay without overflow Content