Check that we do not Debug ASSERT when modifying attribute data for a link.

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


PASS Before load event handled for original link element.
PASS Before load event handled for original link element.
PASS Before load event handled for original link element.
PASS successfullyParsed is true

TEST COMPLETE
PASS Test did not generate a Debug ASSERT.