This test checks that calling `scheduleLayout()` during a layout callback delays that callback until the next frame.

On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".


scheduler.scheduleLayout(layout)
Frame #0 will fire
layout() was called
scheduler.scheduleLayout(layout)
Frame #0 fired
Frame #1 will fire
layout() was called
Frame #1 fired
PASS successfullyParsed is true

TEST COMPLETE