var test = async_test("XMLHttpRequest: The abort() method: Fire a progress event named abort on the XMLHttpRequestUpload object"); test.step(function() { var xhr = new XMLHttpRequest(); xhr.onloadstart = function() { test.step(function() { if (xhr.readyState == 1) { xhr.abort(); } }); }; xhr.upload.onabort = function(e) { test.step(function() { assert_true(e instanceof ProgressEvent); assert_equals(e.type, "abort"); assert_equals(e.target, xhr.upload); test.done(); }); }; xhr.open("POST", "./resources/content.py", true); xhr.send("Test Message"); });