diff -r 000000000000 -r 6474c204b198 dom/mobileconnection/tests/marionette/test_mobile_last_known_network.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/mobileconnection/tests/marionette/test_mobile_last_known_network.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,47 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+MARIONETTE_TIMEOUT = 30000;
+
+SpecialPowers.addPermission("mobilenetwork", true, document);
+
+let connection = navigator.mozMobileConnections[0];
+ok(connection instanceof MozMobileConnection,
+   "connection is instanceof " + connection.constructor);
+
+
+function testLastKnownNetwork() {
+  log("testLastKnownNetwork: " + connection.lastKnownNetwork);
+  // The emulator's hard coded operatoer's mcc and mnc codes.
+  is(connection.lastKnownNetwork, "310-260");
+  runNextTest();
+}
+
+function testLastKnownHomeNetwork() {
+  log("testLastKnownHomeNetwork: " + connection.lastKnownHomeNetwork);
+  // The emulator's hard coded icc's mcc and mnc codes.
+  is(connection.lastKnownHomeNetwork, "310-260");
+  runNextTest();
+}
+
+let tests = [
+  testLastKnownNetwork,
+  testLastKnownHomeNetwork
+];
+
+function runNextTest() {
+  let test = tests.shift();
+  if (!test) {
+    cleanUp();
+    return;
+  }
+
+  test();
+}
+
+function cleanUp() {
+  SpecialPowers.removePermission("mobilenetwork", document);
+  finish();
+}
+
+runNextTest();