diff -r 000000000000 -r 6474c204b198 dom/fmradio/test/marionette/test_bug862672.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/fmradio/test/marionette/test_bug862672.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,53 @@
+/* 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);
+  enableThenDisable();
+}
+
+function enableThenDisable() {
+  log("Enable FM Radio and disable it immediately.");
+  var frequency = FMRadio.frequencyLowerBound + FMRadio.channelWidth;
+  var request = FMRadio.enable(frequency);
+  ok(request);
+
+  var failedToEnable = false;
+  request.onerror = function() {
+    failedToEnable = true;
+  };
+
+  var enableCompleted = false;
+  request.onsuccess = function() {
+    ok(!failedToEnable);
+    enableCompleted = true;
+  };
+
+  var disableReq = FMRadio.disable();
+  ok(disableReq);
+
+  disableReq.onsuccess = function() {
+    // There are two possibilities which depends on the system
+    // process scheduling (bug 911063 comment 0):
+    //   - enable fails
+    //   - enable's onsuccess fires before disable's onsucess
+    ok(failedToEnable || enableCompleted);
+    ok(!FMRadio.enabled);
+    finish();
+  };
+
+  disableReq.onerror = function() {
+    ok(false, "Disable request should not fail.");
+  };
+}
+
+verifyInitialState();
+