diff -r 000000000000 -r 6474c204b198 dom/mobileconnection/tests/marionette/test_mobile_operator_names_roaming.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/mobileconnection/tests/marionette/test_mobile_operator_names_roaming.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,69 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+MARIONETTE_TIMEOUT = 60000;
+MARIONETTE_HEAD_JS = "head.js";
+
+function check(aLongName, aShortName, aRoaming) {
+  let voice = mobileConnection.voice;
+  let network = voice.network;
+
+  is(network.longName, aLongName, "network.longName");
+  is(network.shortName, aShortName, "network.shortName");
+  is(voice.roaming, aRoaming, "voice.roaming");
+}
+
+function setEmulatorOperatorNamesAndWait(aWhich, aLongName, aShortName) {
+  let promises = [];
+  promises.push(waitForManagerEvent("voicechange"));
+  promises.push(setEmulatorOperatorNames(aWhich, aLongName, aShortName));
+  return Promise.all(promises);
+}
+
+// See bug 797972 - B2G RIL: False roaming situation
+//
+// Steps to test:
+// 1. set roaming operator names
+// 2. set emulator roaming
+// 3. wait for onvoicechange event and test passing conditions
+// 4. set emulator roaming back to false
+// 5. wait for onvoicechange event again and callback
+function test(aLongName, aShortName, aRoaming) {
+  log("Testing roaming check '" + aLongName + "', '" + aShortName + "':");
+
+  return Promise.resolve()
+
+    // We should not have voicechange here, but, yes, we do.
+    .then(() => setEmulatorOperatorNamesAndWait("roaming", aLongName, aShortName))
+
+    .then(() => setEmulatorVoiceDataStateAndWait("voice", "roaming"))
+    .then(() => check(aLongName, aShortName, aRoaming))
+    .then(() => setEmulatorVoiceDataStateAndWait("voice", "home"));
+}
+
+startTestCommon(function() {
+  return getEmulatorOperatorNames()
+    .then(function(aOperators) {
+      let {longName: longName, shortName: shortName} = aOperators[0];
+
+      return Promise.resolve()
+
+        // If Either long name or short name of current registered operator
+        // matches SPN("Android"), then the `roaming` attribute should be set
+        // to false.
+        .then(() => test(longName,               shortName,               false))
+        .then(() => test(longName,               shortName.toLowerCase(), false))
+        .then(() => test(longName,               "Bar",                   false))
+        .then(() => test(longName.toLowerCase(), shortName,               false))
+        .then(() => test(longName.toLowerCase(), shortName.toLowerCase(), false))
+        .then(() => test(longName.toLowerCase(), "Bar",                   false))
+        .then(() => test("Foo",                  shortName,               false))
+        .then(() => test("Foo",                  shortName.toLowerCase(), false))
+        .then(() => test("Foo",                  "Bar",                   true))
+
+        // Reset roaming operator.
+        .then(() => setEmulatorOperatorNamesAndWait("roaming",
+                                                    aOperators[1].longName,
+                                                    aOperators[1].shortName));
+    });
+});