diff -r 000000000000 -r 6474c204b198 netwerk/test/unit/test_offline_status.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/netwerk/test/unit/test_offline_status.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,15 @@
+function run_test() {
+  var ioService = Components.classes["@mozilla.org/network/io-service;1"]
+                            .getService(Components.interfaces.nsIIOService);
+
+  try {
+    var linkService = Components.classes["@mozilla.org/network/network-link-service;1"]
+                                .getService(Components.interfaces.nsINetworkLinkService);
+
+    // The offline status should depends on the link status
+    do_check_neq(ioService.offline, linkService.isLinkUp);
+  } catch (e) {
+    // The network link service might not be available
+    do_check_eq(ioService.offline, false);
+  }
+}