This test checks if setting non-supported type does not throw an exception

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

PASS xhr.responseType is ""
PASS xhr.responseType is "arraybuffer"
PASS xhr.responseType is "blob"
PASS xhr.responseType is "document"
PASS xhr.responseType is "text"
PASS xhr.responseType = "dkjdfkjdfkj" did not throw exception.
PASS xhr.responseType = "text"; xhr.responseType = "asdfasdfasd"; xhr.responseType is "text"
PASS successfullyParsed is true

TEST COMPLETE