diff -r 000000000000 -r 6474c204b198 dom/fmradio/test/marionette/test_set_frequency.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/fmradio/test/marionette/test_set_frequency.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,87 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+MARIONETTE_TIMEOUT = 10000;
+
+SpecialPowers.addPermission("fmradio", true, document);
+
+let FMRadio = window.navigator.mozFMRadio;
+
+function verifyInitialState() {
+  log("Verifying initial state.");
+  ok(FMRadio);
+  is(FMRadio.enabled, false);
+  setUp();
+}
+
+function setUp() {
+  let frequency = FMRadio.frequencyLowerBound + FMRadio.channelWidth;
+  FMRadio.enable(frequency);
+  FMRadio.onenabled = setFrequency;
+}
+
+function setFrequency() {
+  log("Set Frequency");
+  let frequency = FMRadio.frequency + FMRadio.channelWidth;
+  var request = FMRadio.setFrequency(frequency);
+  ok(request);
+
+  request.onsuccess = setOutOfRangeFrequency;
+  request.onerror = function() {
+    ok(false, "setFrequency request should not fail.");
+  };
+}
+
+function setOutOfRangeFrequency() {
+  log("Set Frequency that out of the range");
+  var request = FMRadio.setFrequency(FMRadio.frequencyUpperBound + 1);
+  ok(request);
+
+  request.onsuccess = function() {
+    ok(false, "The request of setting an out-of-range frequency should fail.");
+  };
+  request.onerror = setFrequencyWhenSeeking;
+}
+
+function setFrequencyWhenSeeking() {
+  log("Set frequency when seeking");
+  var request = FMRadio.seekUp();
+  ok(request);
+
+  // There are two possibilities which depends on the system
+  // process scheduling (bug 911063 comment 0):
+  //   - seek fails
+  //   - seek's onsuccess fires before setFrequency's onsucess
+
+  var failedToSeek = false;
+  request.onerror = function() {
+    failedToSeek = true;
+  };
+
+  var seekCompletes = false;
+  request.onsuccess = function() {
+    ok(!failedToSeek);
+    seekCompletes = true;
+  };
+
+  var frequency = FMRadio.frequencyUpperBound - FMRadio.channelWidth;
+  var setFreqRequest = FMRadio.setFrequency(frequency);
+  ok(setFreqRequest);
+
+  setFreqRequest.onsuccess = function() {
+    ok(failedToSeek || seekCompletes);
+    cleanUp();
+  };
+}
+
+function cleanUp() {
+  FMRadio.disable();
+  FMRadio.ondisabled = function() {
+    FMRadio.ondisabled = null;
+    ok(!FMRadio.enabled);
+    finish();
+  };
+}
+
+verifyInitialState();
+