1 Tests aborting XMLHttpRequest 'arraybuffer' loading with the .responseType and .response attributes.
3 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
5 PASS responseType property exists.
6 PASS response property exists.
7 PASS abort() was called.
8 PASS 'arraybuffer' .response does not exist after aborted load.
9 PASS successfullyParsed is true