diff -r 000000000000 -r 6474c204b198 toolkit/components/social/test/browser/worker_eventsource.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/components/social/test/browser/worker_eventsource.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,43 @@
+let port, es;
+
+let url = "https://example.com/browser/toolkit/components/social/test/browser/eventsource.resource";
+
+function ok(a, msg) {
+  port.postMessage({topic: "eventSourceTest",
+                   result: {ok: a, msg: msg}});
+}
+
+function is(a, b, msg) {
+  port.postMessage({topic: "eventSourceTest",
+                   result: {is: a, match: b, msg: msg}});
+}
+
+function esListener(e) {
+  esListener.msg_ok = true;
+}
+
+function esOnmessage(e) {
+  ok(true, "onmessage test");
+  ok(esListener.msg_ok, "listener test");
+  es.close();
+  port.postMessage({topic: "pong"});
+}
+
+function doTest() {
+  try {
+    es = new EventSource(url);
+    is(es.url, url, "eventsource.resource accessed", "we can create an eventsource instance");
+    es.addEventListener('test-message', esListener, true);
+    es.onmessage = esOnmessage;
+  } catch (e) {}
+  ok(!!es, "we can create an eventsource instance");
+}
+
+onconnect = function(e) {
+  port = e.ports[0];
+  port.onmessage = function(e) {
+    if (e.data.topic == "ping") {
+      doTest();
+    }
+  }
+}