Tests to ensure that touch events are delivered to an input element with type=range even when there are no touch event handlers in Javascript. This test is only expected to pass if ENABLE_TOUCH_SLIDER is defined.
On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
PASS slider.value is "50"
PASS slider.value is "0"
PASS successfullyParsed is true
TEST COMPLETE
PASS successfullyParsed is true
TEST COMPLETE