diff -r 000000000000 -r 6474c204b198 dom/telephony/test/marionette/test_outgoing_busy.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/telephony/test/marionette/test_outgoing_busy.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,62 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+MARIONETTE_TIMEOUT = 60000;
+MARIONETTE_HEAD_JS = 'head.js';
+
+let number = "5555552368";
+let outgoing;
+
+function dial() {
+  log("Make an outgoing call.");
+
+  telephony.dial(number).then(call => {
+    outgoing = call;
+    ok(outgoing);
+    is(outgoing.number, number);
+    is(outgoing.state, "dialing");
+
+    is(outgoing, telephony.active);
+    is(telephony.calls.length, 1);
+    is(telephony.calls[0], outgoing);
+
+    outgoing.onalerting = function onalerting(event) {
+      log("Received 'onalerting' call event.");
+      is(outgoing, event.call);
+      is(outgoing.state, "alerting");
+
+      emulator.run("gsm list", function(result) {
+        log("Call list is now: " + result);
+        is(result[0], "outbound to  " + number + " : ringing");
+        is(result[1], "OK");
+        busy();
+      });
+    };
+  });
+}
+
+function busy() {
+  log("The receiver is busy.");
+
+  outgoing.onerror = function onerror(event) {
+    log("Received 'error' call event.");
+    is(outgoing, event.call);
+    is(event.call.error.name, "BusyError");
+
+    emulator.run("gsm list", function(result) {
+      log("Call list is now: " + result);
+      is(result[0], "OK");
+      cleanUp();
+    });
+  };
+
+  emulator.run("gsm busy " + number);
+}
+
+function cleanUp() {
+  finish();
+}
+
+startTest(function() {
+  dial();
+});