This test zooms and scrolls the page and checks that the layout and visual viewports respond as expected. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". JSON.stringify(internals.layoutViewportRect()) is {"x":0,"y":0,"width":785,"height":585,"top":0,"right":785,"bottom":585,"left":0} JSON.stringify(internals.visualViewportRect()) is {"x":0,"y":0,"width":392.5,"height":292.5,"top":0,"right":392.5,"bottom":292.5,"left":0} Scrolled to 475, 525 JSON.stringify(internals.layoutViewportRect()) is {"x":82.5,"y":232.5,"width":785,"height":585,"top":232.5,"right":867.5,"bottom":817.5,"left":82.5} JSON.stringify(internals.visualViewportRect()) is {"x":475,"y":525,"width":392.5,"height":292.5,"top":525,"right":867.5,"bottom":817.5,"left":475} Scrolled to 100, 776 JSON.stringify(internals.layoutViewportRect()) is {"x":82.5,"y":483.5,"width":785,"height":585,"top":483.5,"right":867.5,"bottom":1068.5,"left":82.5} JSON.stringify(internals.visualViewportRect()) is {"x":100,"y":776,"width":392.5,"height":292.5,"top":776,"right":492.5,"bottom":1068.5,"left":100} Scrolled to 50, 300 JSON.stringify(internals.layoutViewportRect()) is {"x":50,"y":300,"width":785,"height":585,"top":300,"right":835,"bottom":885,"left":50} JSON.stringify(internals.visualViewportRect()) is {"x":50,"y":300,"width":392.5,"height":292.5,"top":300,"right":442.5,"bottom":592.5,"left":50} PASS successfullyParsed is true TEST COMPLETE