Tests large values for WheelEvent.wheelDeltaX / wheelDeltaY. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". wheelEvent = new WheelEvent('foo', { wheelDeltaX:-2147483648, wheelDeltaY:-2147483648 }) PASS wheelEvent.wheelDeltaX is -2147483648 PASS wheelEvent.wheelDeltaY is -2147483648 PASS wheelEvent.deltaX is 2147483648 PASS wheelEvent.deltaY is 2147483648 wheelEvent = new WheelEvent('foo', { wheelDeltaX:2147483647, wheelDeltaY:2147483647 }) PASS wheelEvent.wheelDeltaX is 2147483647 PASS wheelEvent.wheelDeltaY is 2147483647 PASS wheelEvent.deltaX is -2147483647 PASS wheelEvent.deltaY is -2147483647 wheelEvent = new WheelEvent('foo', { deltaX:-2147483647, deltaY:-2147483647 }) PASS wheelEvent.wheelDeltaX is 2147483647 PASS wheelEvent.wheelDeltaY is 2147483647 PASS wheelEvent.deltaX is -2147483647 PASS wheelEvent.deltaY is -2147483647 wheelEvent = new WheelEvent('foo', { deltaX:-2147483648, deltaY:-2147483648 }) PASS wheelEvent.wheelDeltaX is 2147483647 PASS wheelEvent.wheelDeltaY is 2147483647 PASS wheelEvent.deltaX is -2147483648 PASS wheelEvent.deltaY is -2147483648 wheelEvent = new WheelEvent('foo', { deltaX:2147483647, deltaY:2147483647 }) PASS wheelEvent.wheelDeltaX is -2147483647 PASS wheelEvent.wheelDeltaY is -2147483647 PASS wheelEvent.deltaX is 2147483647 PASS wheelEvent.deltaY is 2147483647 wheelEvent = new WheelEvent('foo', { deltaX:-2147483649, deltaY:-2147483649 }) PASS wheelEvent.wheelDeltaX is 2147483647 PASS wheelEvent.wheelDeltaY is 2147483647 PASS wheelEvent.deltaX is -2147483649 PASS wheelEvent.deltaY is -2147483649 wheelEvent = new WheelEvent('foo', { deltaX:2147483649, deltaY:2147483649 }) PASS wheelEvent.wheelDeltaX is -2147483648 PASS wheelEvent.wheelDeltaY is -2147483648 PASS wheelEvent.deltaX is 2147483649 PASS wheelEvent.deltaY is 2147483649 wheelEvent = document.createEvent('wheelevent') wheelEvent.initWebKitWheelEvent(-2147483648, -2147483648) PASS wheelEvent.deltaX is 2147483648 PASS wheelEvent.deltaY is 2147483648 wheelEvent = document.createEvent('wheelevent') wheelEvent.initWebKitWheelEvent(2147483647, 2147483647) PASS wheelEvent.deltaX is -2147483647 PASS wheelEvent.deltaY is -2147483647 PASS successfullyParsed is true TEST COMPLETE