1 Ensure that custom element callback fires before DOMContentLoaded event
3 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
6 PASS successfullyParsed is true
9 PASS eventlog[0] is 'created x-foo'
10 PASS eventlog[1] is 'DOMContentLoaded event'
11 PASS eventlog[2] is 'load event'