diff -r 000000000000 -r 6474c204b198 dom/mobilemessage/tests/marionette/test_bug814761.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/mobilemessage/tests/marionette/test_bug814761.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,72 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+MARIONETTE_TIMEOUT = 60000;
+
+SpecialPowers.setBoolPref("dom.sms.enabled", true);
+SpecialPowers.addPermission("sms", true, document);
+
+let manager = window.navigator.mozMobileMessage;
+ok(manager instanceof MozMobileMessageManager,
+   "manager is instance of " + manager.constructor);
+
+// Note: 378 chars and below is fine, but 379 and above will cause the issue.
+// Sending first message works, but second one we get emulator callback but
+// the actual SMS is never received, so script will timeout waiting for the
+// onreceived event. Also note that a single larger message (i.e. 1600
+// characters) works; so it is not a compounded send limit.
+let fromNumber = "5551110000";
+let msgLength = 379;
+let msgText = new Array(msgLength + 1).join('a');
+
+let pendingEmulatorCmdCount = 0;
+function sendSmsToEmulator(from, text) {
+  ++pendingEmulatorCmdCount;
+
+  let cmd = "sms send " + from + " " + text;
+  runEmulatorCmd(cmd, function(result) {
+    --pendingEmulatorCmdCount;
+
+    is(result[0], "OK", "Emulator response");
+  });
+}
+
+function firstIncomingSms() {
+  simulateIncomingSms(secondIncomingSms);
+}
+
+function secondIncomingSms() {
+  simulateIncomingSms(cleanUp);
+}
+
+function simulateIncomingSms(nextFunction) {
+  log("Simulating incoming multipart SMS (" + msgText.length
+      + " chars total).");
+
+  manager.onreceived = function onreceived(event) {
+    log("Received 'onreceived' event.");
+    manager.onreceived = null;
+
+    let incomingSms = event.message;
+    ok(incomingSms, "incoming sms");
+    is(incomingSms.body, msgText, "msg body");
+
+    window.setTimeout(nextFunction, 0);
+  };
+
+  sendSmsToEmulator(fromNumber, msgText);
+}
+
+function cleanUp() {
+  if (pendingEmulatorCmdCount) {
+    window.setTimeout(cleanUp, 100);
+    return;
+  }
+
+  SpecialPowers.removePermission("sms", document);
+  SpecialPowers.clearUserPref("dom.sms.enabled");
+  finish();
+}
+
+// Start the test
+firstIncomingSms();