diff -r 000000000000 -r 6474c204b198 dom/system/gonk/tests/marionette/test_network_active_changed.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/system/gonk/tests/marionette/test_network_active_changed.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,54 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+MARIONETTE_TIMEOUT = 60000;
+MARIONETTE_HEAD_JS = "head.js";
+
+const SETTINGS_KEY_DATA_ENABLED = "ril.data.enabled";
+const TOPIC_NETWORK_ACTIVE_CHANGED = "network-active-changed";
+
+let networkManager =
+  Cc["@mozilla.org/network/manager;1"].getService(Ci.nsINetworkManager);
+ok(networkManager,
+   "networkManager.constructor is " + networkManager.constructor);
+
+function testInitialState() {
+  return Promise.resolve()
+    .then(() => getSettings(SETTINGS_KEY_DATA_ENABLED))
+    .then((enabled) => {
+      is(enabled, false, "data should be off by default");
+      is(networkManager.active, null,
+         "networkManager.active should be null by default");
+    });
+}
+
+function testActiveNetworkChangedBySwitchingDataCall(aDataCallEnabled) {
+  log("Test active network by switching dataCallEnabled to " + aDataCallEnabled);
+
+  return Promise.resolve()
+    .then(() => setSettings(SETTINGS_KEY_DATA_ENABLED, aDataCallEnabled))
+    .then(() => waitForObserverEvent(TOPIC_NETWORK_ACTIVE_CHANGED))
+    .then((subject) => {
+      if (aDataCallEnabled) {
+        ok(subject instanceof Ci.nsINetworkInterface,
+           "subject should be an instance of nsINetworkInterface");
+        ok(subject instanceof Ci.nsIRilNetworkInterface,
+           "subject should be an instance of nsIRILNetworkInterface");
+        is(subject.type, Ci.nsINetworkInterface.NETWORK_TYPE_MOBILE,
+           "subject.type should be NETWORK_TYPE_MOBILE");
+      }
+
+      is(subject, networkManager.active,
+         "subject should be equal with networkManager.active");
+    });
+}
+
+// Start test
+startTestBase(function() {
+  return Promise.resolve()
+    .then(() => testInitialState())
+    // Test active network changed by enabling data call.
+    .then(() => testActiveNetworkChangedBySwitchingDataCall(true))
+    // Test active network changed by disabling data call.
+    .then(() => testActiveNetworkChangedBySwitchingDataCall(false));
+});