1 Tests audio context for offline attributes and methods.
3 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
6 PASS onlineContext.oncomplete is undefined.
7 PASS onlineContext.startRendering is undefined.
8 PASS offlineContext.oncomplete is defined.
9 PASS offlineContext.startRendering is defined.
10 PASS successfullyParsed is true