Tests XMLHttpRequest.responseType of "json" with a valid payload.

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


PASS jsonXHR.response is null
PASS jsonXHR.response is non-null.
PASS jsonXHR.response is jsonXHR.response
PASS JSON.stringify(jsonXHR.response) is JSON.stringify(JSON.parse(textXHR.responseText))
PASS jsonXHR.open("GET", jsonUrl); jsonXHR.response is null
PASS successfullyParsed is true

TEST COMPLETE