Test how file system methods react to too few arguments. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS webkitRequestFileSystem() threw exception TypeError: Failed to execute 'webkitRequestFileSystem' on 'Window': 3 arguments required, but only 0 present.. PASS webkitRequestFileSystem(TEMPORARY) threw exception TypeError: Failed to execute 'webkitRequestFileSystem' on 'Window': 3 arguments required, but only 1 present.. PASS webkitResolveLocalFileSystemURL() threw exception TypeError: Failed to execute 'webkitResolveLocalFileSystemURL' on 'Window': 2 arguments required, but only 0 present.. PASS successfullyParsed is true TEST COMPLETE