diff -r 000000000000 -r 6474c204b198 netwerk/test/unit/test_httpsuspend.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/netwerk/test/unit/test_httpsuspend.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,80 @@
+// This file ensures that suspending a channel directly after opening it
+// suspends future notifications correctly.
+
+Cu.import("resource://testing-common/httpd.js");
+
+XPCOMUtils.defineLazyGetter(this, "URL", function() {
+  return "http://localhost:" + httpserv.identity.primaryPort;
+});
+
+const MIN_TIME_DIFFERENCE = 3000;
+const RESUME_DELAY = 5000;
+
+var listener = {
+  _lastEvent: 0,
+  _gotData: false,
+
+  QueryInterface: function(iid) {
+    if (iid.equals(Components.interfaces.nsIStreamListener) ||
+        iid.equals(Components.interfaces.nsIRequestObserver) ||
+        iid.equals(Components.interfaces.nsISupports))
+      return this;
+    throw Components.results.NS_ERROR_NO_INTERFACE;
+  },
+
+  onStartRequest: function(request, ctx) {
+    this._lastEvent = Date.now();
+    request.QueryInterface(Ci.nsIRequest);
+
+    // Insert a delay between this and the next callback to ensure message buffering
+    // works correctly
+    request.suspend();
+    request.suspend();
+    do_timeout(RESUME_DELAY, function() request.resume());
+    do_timeout(RESUME_DELAY + 1000, function() request.resume());
+  },
+
+  onDataAvailable: function(request, context, stream, offset, count) {
+    do_check_true(Date.now() - this._lastEvent >= MIN_TIME_DIFFERENCE);
+    read_stream(stream, count);
+
+    // Ensure that suspending and resuming inside a callback works correctly
+    request.suspend();
+    request.suspend();
+    request.resume();
+    request.resume();
+
+    this._gotData = true;
+  },
+
+  onStopRequest: function(request, ctx, status) {
+    do_check_true(this._gotData);
+    httpserv.stop(do_test_finished);
+  }
+};
+
+function makeChan(url) {
+  var ios = Cc["@mozilla.org/network/io-service;1"].getService(Ci.nsIIOService);
+  var chan = ios.newChannel(url, null, null).QueryInterface(Ci.nsIHttpChannel);
+  return chan;
+}
+
+var httpserv = null;
+
+function run_test() {
+  httpserv = new HttpServer();
+  httpserv.registerPathHandler("/woo", data);
+  httpserv.start(-1);
+
+  var chan = makeChan(URL + "/woo");
+  chan.QueryInterface(Ci.nsIRequest);
+  chan.asyncOpen(listener, null);
+
+  do_test_pending();
+}
+
+function data(metadata, response) {
+  let httpbody = "0123456789";
+  response.setHeader("Content-Type", "text/plain", false);
+  response.bodyOutputStream.write(httpbody, httpbody.length);
+}