test_popupremoving.xhtml

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<?xml version="1.0"?>

<?xml-stylesheet href="chrome://global/skin" type="text/css"?>

<?xml-stylesheet href="chrome://mochikit/content/tests/SimpleTest/test.css" type="text/css"?>

<window title="Popup Removing Tests"

        onload="setTimeout(nextTest, 0)"

        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">

<!--

  This test checks that popup elements can be removed in various ways without

  crashing. It tests two situations, one with menus that are 'separate', and

  one with menus that are 'nested'. In each case, there are four levels of menu.

  The nextTest function starts the process by opening the first menu. A set of

  popupshown event listeners are used to open the next menu until all four are

  showing. This last one calls removePopup to remove the menu node from the

  tree. This should hide the popups as they are no longer in a document.

  A mutation listener is triggered when the fourth menu closes by having its

  open attribute cleared. This listener hides the third popup which causes

  its frame to be removed. Naturally, we want to ensure that this doesn't

  crash when the third menu is removed.

-->

  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>

  <script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>

<hbox>

<menu id="nestedmenu1" label="1">

    <menupopup id="nestedpopup1" onpopupshown="if (event.target == this) this.firstChild.open = true">

      <menu id="nestedmenu2" label="2">

        <menupopup id="nestedpopup2" onpopupshown="if (event.target == this) this.firstChild.open = true">

          <menu id="nestedmenu3" label="3">

            <menupopup id="nestedpopup3" onpopupshown="if (event.target == this) this.firstChild.open = true">

              <menu id="nestedmenu4" label="4">

                <menupopup id="nestedpopup4">

                  <menuitem label="Nested 1"/>

                  <menuitem label="Nested 2"/>

                  <menuitem label="Nested 3"/>

                </menupopup>

              </menu>

            </menupopup>

          </menu>

        </menupopup>

      </menu>

    </menupopup>

</menu>

<menu id="separatemenu1" label="1">

    <menupopup id="separatepopup1" onpopupshown="$('separatemenu2').open = true">

        <menuitem label="L1 One"/>

        <menuitem label="L1 Two"/>

        <menuitem label="L1 Three"/>

    </menupopup>

</menu>

<menu id="separatemenu2" label="2">

    <menupopup id="separatepopup2" onpopupshown="$('separatemenu3').open = true"

                                   onpopuphidden="popup2Hidden()">

        <menuitem label="L2 One"/>

        <menuitem label="L2 Two"/>

        <menuitem label="L2 Three"/>

    </menupopup>

</menu>

<menu id="separatemenu3" label="3" onpopupshown="$('separatemenu4').open = true">

    <menupopup id="separatepopup3">

        <menuitem label="L3 One"/>

        <menuitem label="L3 Two"/>

        <menuitem label="L3 Three"/>

    </menupopup>

</menu>

<menu id="separatemenu4" label="4" onpopuphidden="$('separatemenu2').open = false">

    <menupopup id="separatepopup3">

        <menuitem label="L4 One"/>

        <menuitem label="L4 Two"/>

        <menuitem label="L4 Three"/>

    </menupopup>

</menu>

</hbox>

<script class="testbody" type="application/javascript">

<![CDATA[

SimpleTest.waitForExplicitFinish();

let gKey = "";

let gTriggerMutation = null;

let gChangeMutation = null;

let gResolveRemovePopups = null;

let gResolvePopup2Hidden = null;

function nextTest()

  let promiseRemovePopups, promisePopup2Hidden;

  if (gKey == "") {

    gKey = "separate";

    $("separatemenu4").addEventListener("popupshown", removePopups);

    promiseRemovePopups = new Promise(resolve => gResolveRemovePopups = resolve);

    promisePopup2Hidden = new Promise(resolve => gResolvePopup2Hidden = resolve);

  else if (gKey == "separate") {

    gKey = "nested";

    $("nestedmenu4").addEventListener("popupshown", removePopups);

    promiseRemovePopups = new Promise(resolve => gResolveRemovePopups = resolve);

    gResolvePopup2Hidden = null;

  else {

    SimpleTest.finish();

    return;

  SimpleTest.executeSoon(async () => {

    $(gKey + "menu1").open = true;

    await Promise.all([promiseRemovePopups, promisePopup2Hidden]);

    nextTest();

});

function modified(aMutationList, aObserver) {

  // use this mutation listener to hide the third popup, destroying its frame.

  // It gets triggered when the open attribute is cleared on the fourth menu.

  for (const mutation of aMutationList) {

    if (mutation.attributeName != "open") {

      continue;

    gChangeMutation.hidden = true;

    // force a layout flush

    document.documentElement.clientWidth;

    gChangeMutation = null;

    aObserver.disconnect();

    break;

async function removePopups()

  var menu2 = $(gKey + "menu2");

  var menu3 = $(gKey + "menu3");

  is(menu2.getAttribute("open"), "true", gKey + " menu 2 open before");

  is(menu3.getAttribute("open"), "true", gKey + " menu 3 open before");

  const observer = new MutationObserver(modified);

  observer.observe(menu3, { attributes: true });

  gChangeMutation = $(gKey + "menu4");

  var menu = $(gKey + "menu1");

  menu.remove();

  const key = gKey;

  await new Promise (SimpleTest.executeSoon);

  if (key == "nested") {

    // the 'separate' test checks this during the popup2 hidden event handler

    is(menu2.hasAttribute("open"), false, gKey + " menu 2 open after");

    is(menu3.hasAttribute("open"), false, gKey + " menu 3 open after");

  gResolveRemovePopups();

function popup2Hidden() {

  is($(gKey + "menu2").hasAttribute("open"), false, gKey + " menu 2 open after");

  if (gResolvePopup2Hidden) {

    gResolvePopup2Hidden();

]]>

</script>

<body xmlns="http://www.w3.org/1999/xhtml">

<p id="display">

</p>

<div id="content" style="display: none">

</div>

<pre id="test">

</pre>

</body>

</window>