This test documents the behavior of MouseEvent.offsetX/Y in response to HTMLElement.click().

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

Simulated click with .click():
PASS event.offsetX is 0
PASS event.offsetY is 0
Click with mouse at 0,0:
PASS event.offsetX is 0
PASS event.offsetY is 0
Click with mouse at 40,50:
PASS event.offsetX is 40
PASS event.offsetY is 50
PASS successfullyParsed is true

TEST COMPLETE