diff -r 000000000000 -r 6474c204b198 dom/mobileconnection/tests/marionette/test_mobile_signal_strength.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/mobileconnection/tests/marionette/test_mobile_signal_strength.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,132 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+MARIONETTE_TIMEOUT = 30000;
+MARIONETTE_HEAD_JS = "mobile_header.js";
+
+/* Emulator command for GSM/UMTS signal strength */
+function setEmulatorGsmSignalStrength(rssi) {
+  emulatorHelper.sendCommand("gsm signal " + rssi);
+}
+
+/* Emulator command for LTE signal strength */
+function setEmulatorLteSignalStrength(rxlev, rsrp, rssnr) {
+  let lteSignal = rxlev + " " + rsrp + " " + rssnr;
+  emulatorHelper.sendCommand("gsm lte_signal " + lteSignal);
+}
+
+function waitForVoiceChangeEvent(callback) {
+  mobileConnection.addEventListener("voicechange", function onvoicechange() {
+    mobileConnection.removeEventListener("voicechange", onvoicechange);
+
+    if (callback && typeof callback === "function") {
+      callback();
+    }
+  });
+}
+
+/* Test Initial Signal Strength Info */
+taskHelper.push(function testInitialSignalStrengthInfo() {
+  log("Test initial signal strength info");
+
+  let voice = mobileConnection.voice;
+  // Android emulator initializes the signal strength to -99 dBm
+  is(voice.signalStrength, -99, "check voice.signalStrength");
+  is(voice.relSignalStrength, 44, "check voice.relSignalStrength");
+
+  taskHelper.runNext();
+});
+
+/* Test Unsolicited Signal Strength Events for LTE */
+taskHelper.push(function testLteSignalStrength() {
+  // Set emulator's LTE signal strength and wait for 'onvoicechange' event.
+  function doTestLteSignalStrength(input, expect, callback) {
+    log("Test LTE signal info with data : " + JSON.stringify(input));
+
+    waitForVoiceChangeEvent(function() {
+      let voice = mobileConnection.voice;
+      is(voice.signalStrength, expect.signalStrength,
+         "check voice.signalStrength");
+      is(voice.relSignalStrength, expect.relSignalStrength,
+         "check voice.relSignalStrength");
+
+      if (callback && typeof callback === "function") {
+        callback();
+      }
+    });
+
+    setEmulatorLteSignalStrength(input.rxlev, input.rsrp, input.rssnr);
+  }
+
+  let testData = [
+    // All invalid case.
+    {input: {
+      rxlev: 99,
+      rsrp: 65535,
+      rssnr: 65535},
+     expect: {
+      signalStrength: null,
+      relSignalStrength: null}
+    },
+    // Valid rxlev with max value.
+    {input: {
+      rxlev: 63,
+      rsrp: 65535,
+      rssnr: 65535},
+     expect: {
+      signalStrength: -48,
+      relSignalStrength: 100}
+    },
+    // Valid rxlev.
+    {input: {
+      rxlev: 12,
+      rsrp: 65535,
+      rssnr: 65535},
+     expect: {
+      signalStrength: -99,
+      relSignalStrength: 100}
+    },
+    // Valid rxlev with min value.
+    {input: {
+      rxlev: 0,
+      rsrp: 65535,
+      rssnr: 65535},
+     expect: {
+      signalStrength: -111,
+      relSignalStrength: 0}
+    }
+  ];
+
+  // Run all test data.
+  (function do_call() {
+    let next = testData.shift();
+    if (!next) {
+      taskHelper.runNext();
+      return;
+    }
+    doTestLteSignalStrength(next.input, next.expect, do_call);
+  })();
+});
+
+/* Reset Signal Strength Info to default, and finsih the test */
+taskHelper.push(function testResetSignalStrengthInfo() {
+  // Reset emulator's signal strength and wait for 'onvoicechange' event.
+  function doResetSignalStrength(rssi) {
+    waitForVoiceChangeEvent(function() {
+      let voice = mobileConnection.voice;
+      is(voice.signalStrength, -99, "check voice.signalStrength");
+      is(voice.relSignalStrength, 44, "check voice.relSignalStrength");
+
+      taskHelper.runNext();
+    });
+
+    setEmulatorGsmSignalStrength(rssi);
+  }
+
+  // Emulator uses rssi = 7 as default value, and we need to reset it after
+  // finishing test in case other test cases need those values for testing.
+  doResetSignalStrength(7);
+});
+
+// Start test
+taskHelper.runNext();