function frameScript()

{

  ChromeUtils.import("resource://gre/modules/Services.jsm");

  function eventHandler(e) {

    if (!docShell) {

      sendAsyncMessage("Test:Fail", "docShell is null");

    }

    sendAsyncMessage("Test:Event", [e.type, e.target === content.document, e.eventPhase]);

  }

  let outerID = content.QueryInterface(Ci.nsIInterfaceRequestor).

        getInterface(Ci.nsIDOMWindowUtils).outerWindowID;

  function onOuterWindowDestroyed(subject, topic, data) {

    if (docShell) {

      sendAsyncMessage("Test:Fail", "docShell is non-null");

    }

    let id = subject.QueryInterface(Ci.nsISupportsPRUint64).data;

    sendAsyncMessage("Test:Event", ["outer-window-destroyed", id == outerID]);

    if (id == outerID) {

      Services.obs.removeObserver(onOuterWindowDestroyed, "outer-window-destroyed");

    }

  }

  let url = "https://example.com/browser/dom/base/test/file_messagemanager_unload.html";

  content.location = url;

  addEventListener("load", (e) => {

    if (e.target.location != url) {

      return;

    }

    addEventListener("unload", eventHandler, false);

    addEventListener("unload", eventHandler, true);

    addEventListener("pagehide", eventHandler, false);

    addEventListener("pagehide", eventHandler, true);

    Services.obs.addObserver(onOuterWindowDestroyed, "outer-window-destroyed");

    sendAsyncMessage("Test:Ready");

  }, true);

}

const EXPECTED = [

  // Unload events on the TabChildGlobal. These come first so that the

  // docshell is available.

  ["unload", false, 2],

  ["unload", false, 2],

  // pagehide and unload events for the top-level page.

  ["pagehide", true, 1],

  ["pagehide", true, 3],

  ["unload", true, 1],

  // pagehide and unload events for the iframe.

  ["pagehide", false, 1],

  ["pagehide", false, 3],

  ["unload", false, 1],

  // outer-window-destroyed for both pages.

  ["outer-window-destroyed", false],

  ["outer-window-destroyed", true],

];

function test() {

  waitForExplicitFinish();

  var newTab = BrowserTestUtils.addTab(gBrowser, "about:blank");

  gBrowser.selectedTab = newTab;

  let browser = newTab.linkedBrowser;

  let frameLoader = browser.frameLoader;

  ok(frameLoader !== null, "frameLoader looks okay");

  browser.messageManager.loadFrameScript("data:,(" + frameScript.toString() + ")()", false);

  browser.messageManager.addMessageListener("Test:Fail", (msg) => {

    ok(false, msg.data);

  }, true);

  let index = 0;

  browser.messageManager.addMessageListener("Test:Event", (msg) => {

    ok(msg.target === browser, "<browser> is correct");

    ok(msg.targetFrameLoader === frameLoader, "frameLoader is correct");

    ok(browser.frameLoader === null, "browser frameloader null during teardown");

    info(JSON.stringify(msg.data));

    is(JSON.stringify(msg.data), JSON.stringify(EXPECTED[index]), "results match");

    index++;

    if (index == EXPECTED.length) {

      finish();

    }

  }, true);

  browser.messageManager.addMessageListener("Test:Ready", () => {

    info("Got ready message");

    gBrowser.removeCurrentTab();

  });

}