Test rejection handled event.

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

PASS error.type is "unhandledrejection"
PASS error.cancelable is true
PASS error.promise is promise
PASS error.reason is "ERROR"
PASS reason is "ERROR"
PASS handled.type is "rejectionhandled"
PASS handled.cancelable is false
PASS handled.promise is promise
PASS handled.reason is "ERROR"
PASS successfullyParsed is true

TEST COMPLETE