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<?xml version="1.0"?>
                 type="text/css"?>
<!--
-->
  onload="start();">
  <!-- test code goes here -->
  <script type="application/javascript"><![CDATA[
    /* global messageManager, sendAsyncMessage, getGroupMessageManager */
    var FRAME_SCRIPT1 = "data:,addMessageListener('test', function () {" +
                        "sendSyncMessage('test', 'frame1')})";
    var FRAME_SCRIPT2 = "data:,addMessageListener('test', function () {" +
                        "sendSyncMessage('test', 'frame2')})";
    var globalMM = Cc["@mozilla.org/globalmessagemanager;1"].getService();
    function is(val, exp, msg) {
      window.arguments[0].is(val, exp, msg);
    }
    function promiseMessage(type, mm) {
      return new Promise(function (resolve) {
        mm.addMessageListener("test", function onMessage(msg) {
          mm.removeMessageListener("test", onMessage);
          is(msg.data, type, "correct message " + type);
          resolve();
        });
      });
    }
    /**
     * Tests that swapping docShells works as expected wrt to groups.
     */
    function start() {
      var browser1 = document.querySelector("browser");
      browser1.messageManager.loadFrameScript(FRAME_SCRIPT1, true);
      var browser2 = document.querySelector("browser + browser");
      browser2.messageManager.loadFrameScript(FRAME_SCRIPT2, true);
      var promise1 = promiseMessage("frame2", getGroupMessageManager("test1"));
      var promise2 = promiseMessage("frame1", getGroupMessageManager("test2"));
      browser1.swapFrameLoaders(browser2);
      messageManager.broadcastAsyncMessage("test");
      Promise.all([promise1, promise2]).then(function () {
        window.arguments[0].setTimeout(function() { this.next(); });
        window.close();
      });
    }
  ]]></script>
  <browser messagemanagergroup="test1" type="content" src="about:mozilla" />
  <browser messagemanagergroup="test2" type="content" src="about:mozilla" />
</window>