diff -r 000000000000 -r 6474c204b198 dom/system/gonk/tests/marionette/test_fakevolume.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/system/gonk/tests/marionette/test_fakevolume.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,29 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+MARIONETTE_TIMEOUT = 10000;
+
+let Cc = SpecialPowers.Cc;
+let Ci = SpecialPowers.Ci;
+
+let volumeService = Cc["@mozilla.org/telephony/volume-service;1"].getService(Ci.nsIVolumeService);
+ok(volumeService, "Should have volume service");
+
+let volName = "fake";
+let mountPoint = "/data/fake/storage";
+volumeService.createFakeVolume(volName, mountPoint);
+
+let vol = volumeService.getVolumeByName(volName);
+ok(vol, "volume shouldn't be null");
+
+is(volName, vol.name, "name");
+is(mountPoint, vol.mountPoint, "moutnPoint");
+is(Ci.nsIVolume.STATE_INIT, vol.state, "state");
+
+
+let oldMountGen = vol.mountGeneration;
+volumeService.SetFakeVolumeState(volName, Ci.nsIVolume.STATE_MOUNTED);
+is(Ci.nsIVolume.STATE_MOUNTED, vol.state, "state");
+ok(vol.mountGeneration > oldMountGen, "mount generation should be incremented");
+
+finish();