{
            var xhr = new XMLHttpRequest();

            xhr.upload.onprogress = function(e)
            {
                test.step(function()
                {
                    assert_true(e instanceof ProgressEvent);
                    assert_equals(e.type, "progress");
                    assert_equals(e.target, xhr.upload);
                    test.done();
                });
            };

            xhr.open("POST", "./resources/content.py", true);
            xhr.send("Test Message");
      