Test that XMLHttpRequest.response returns an empty ArrayBuffer when received a response without an entity body. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". Test that XMLHttpRequest.response returns an empty ArrayBuffer when received a response with zero content length. PASS request.status is 200 PASS Object.prototype.toString.call(request.response) is '[object ArrayBuffer]' PASS request.response.byteLength is 0 Test that XMLHttpRequest.response returns an empty ArrayBuffer when received status is '304 not modified'. PASS request.status is 200 PASS Object.prototype.toString.call(request.response) is '[object ArrayBuffer]' PASS request.response.byteLength is 68 PASS request2.status is 304 PASS Object.prototype.toString.call(request2.response) is '[object ArrayBuffer]' PASS request2.response.byteLength is 0 PASS successfullyParsed is true TEST COMPLETE