Test for correct jqXHR object

[rwaldron]

Also about test-units
There are 2 test that failed

1.Non-Native Streams are [object XMLHttpRequest]
Expected: "[object XMLHttpRequest]"
Result: "[object Object]"
..........................
2.Non-Native Streams are [object XMLHttpRequest]
Expected:"[object XMLHttpRequest]"
Result: "[object Object]"
Are you sure that they should be [object XMLHttpRequest] ?

because, from JQuery docs :
"The jqXHR Object

The jQuery XMLHttpRequest (jqXHR) object returned by $.ajax() as of jQuery 1.5 is a superset of the browser's native XMLHttpRequest object. For example, it contains responseText and responseXML properties, as well as a getResponseHeader() method. When the transport mechanism is something other than XMLHttpRequest (for example, a script tag for a JSONP request) the jqXHR object simulates native XHR functionality where possible.

As of jQuery 1.5.1, the jqXHR object also contains the overrideMimeType method.