1 This test ensures that the lifecycle callback of a parser-made element is visible in following script block.
3 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
6 PASS window.callbacksCalled is ['a', 'b', 'c']
7 PASS window.callbacksCalled is ['a', 'b', 'c']
8 PASS successfullyParsed is true