diff -r 000000000000 -r 6474c204b198 dom/mobileconnection/tests/marionette/test_mobile_roaming_preference.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/mobileconnection/tests/marionette/test_mobile_roaming_preference.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,98 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+MARIONETTE_TIMEOUT = 60000;
+
+SpecialPowers.addPermission("mobileconnection", true, document);
+
+let connection = navigator.mozMobileConnections[0];
+ok(connection instanceof MozMobileConnection,
+   "connection is instanceof " + connection.constructor);
+
+function failedToSetRoamingPreference(mode, expectedErrorMessage, callback) {
+  let request = connection.setRoamingPreference(mode);
+
+  ok(request instanceof DOMRequest,
+     "request instanceof " + request.constructor);
+
+  request.onsuccess = function onsuccess() {
+    ok(false, "Should not be here !!");
+
+    callback();
+  }
+
+  request.onerror = function onerror() {
+    is(request.error.name, expectedErrorMessage);
+
+    callback();
+  }
+}
+
+function testSetRoamingPreferenceWithNullValue() {
+  log("test setRoamingPreference(null)");
+
+  failedToSetRoamingPreference(null, "InvalidParameter", runNextTest);
+}
+
+function testSetRoamingPreferenceWithInvalidValue() {
+  log("test setRoamingPreference(\"InvalidValue\")");
+
+  failedToSetRoamingPreference("InvalidValue", "InvalidParameter", runNextTest);
+}
+
+function testSetRoamingPreferenceToHome() {
+  log("test setRoamingPreference(\"home\")");
+
+  // TODO: Bug 896394.
+  // Currently emulator run as GSM mode by default. So we expect to get a
+  // 'RequestNotSupported' error here.
+  failedToSetRoamingPreference("home", "RequestNotSupported", runNextTest);
+}
+
+function testGetRoamingPreference() {
+  log("test getRoamingPreference()");
+
+  // TODO: Bug 896394.
+  // Currently emulator run as GSM mode by default. So we expect to get a
+  // 'RequestNotSupported' error here.
+  let request = connection.getRoamingPreference();
+
+  ok(request instanceof DOMRequest,
+     "request instanceof " + request.constructor);
+
+  request.onsuccess = function onsuccess() {
+    ok(false, "Should not be here !!");
+
+    runNextTest();
+  }
+
+  request.onerror = function onerror() {
+    is(request.error.name, "RequestNotSupported");
+
+    runNextTest();
+  }
+}
+
+let tests = [
+  testSetRoamingPreferenceWithNullValue,
+  testSetRoamingPreferenceWithInvalidValue,
+  testSetRoamingPreferenceToHome,
+  testGetRoamingPreference
+];
+
+function runNextTest() {
+  let test = tests.shift();
+  if (!test) {
+    cleanUp();
+    return;
+  }
+
+  test();
+}
+
+function cleanUp() {
+  SpecialPowers.removePermission("mobileconnection", document);
+  finish();
+}
+
+runNextTest();
\ No newline at end of file