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diff --git a/dom/base/test/chrome/test_bug800386.xul b/dom/base/test/chrome/test_bug800386.xul
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+<?xml version="1.0"?>
+<?xml-stylesheet type="text/css" href="chrome://global/skin"?>
+<?xml-stylesheet type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"?>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=800386
+-->
+<window title="Mozilla Bug 800386"
+ xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+ <script type="application/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"/>
+
+ <!-- test results are displayed in the html:body -->
+ <body xmlns="http://www.w3.org/1999/xhtml">
+ <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=800386"
+ target="_blank">Mozilla Bug 800386</a>
+ </body>
+
+ <!-- test code goes here -->
+ <script type="application/javascript">
+ <![CDATA[
+ /** Test for Bug 800386 **/
+ Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
+
+ SimpleTest.waitForExplicitFinish();
+
+ var triedForwarding = false;
+ var forwardFailed = false;
+
+ var xhr = new XMLHttpRequest;
+ var xhr2 = new XMLHttpRequest;
+
+ var eventSink = xhr.getInterface(Components.interfaces.nsIProgressEventSink);
+ isnot(eventSink, null, "Should get event sink directly!");
+
+ // Now jump through some hoops to get us a getInterface call from C++
+
+ var requestor = {
+ getInterface: function(aIID) {
+ if (aIID.equals(Components.interfaces.nsIProgressEventSink)) {
+ triedForwarding = true;
+ try {
+ return xhr2.getInterface(aIID);
+ } catch (e) {
+ forwardFailed = true;
+ }
+ }
+ throw Components.results.NS_ERROR_NO_INTERFACE;
+ },
+
+ QueryInterface: XPCOMUtils.generateQI([Components.interfaces.nsISupports,
+ Components.interfaces.nsIInterfaceRequestor])
+ };
+
+ // HTTP URI so that we get progress callbacks
+ xhr.open("GET", "http://mochi.test:8888/", false);
+ xhr.channel.notificationCallbacks = requestor;
+ xhr.onreadystatechange = function() {
+ if (xhr.readyState == 4) {
+ ok(triedForwarding,
+ "Should have had an attempt to treat us as a progress event sink");
+ ok(!forwardFailed,
+ "Should have been able to forward getInterface on to the XHR");
+ SimpleTest.finish();
+ }
+ }
+ xhr.send();
+ ]]>
+ </script>
+</window>