gecko-dev/dom/tests/mochitest/chrome/test_docshell_swap.xul

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XML

<?xml version="1.0"?>
<?xml-stylesheet type="text/css" href="chrome://global/skin"?>
<?xml-stylesheet type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"?>
<window title="Docshell swap test"
xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
<script type="application/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"/>
<!-- test results are displayed in the html:body -->
<body xmlns="http://www.w3.org/1999/xhtml">
</body>
<!-- test code goes here -->
<script type="application/javascript">
<![CDATA[
SimpleTest.waitForExplicitFinish();
// Create two identical windows, each with a <browser> element.
let win1 = window.openDialog("window_docshell_swap.xul", "_blank","chrome,width=300,height=200");
let win2 = window.openDialog("window_docshell_swap.xul", "_blank","chrome,width=300,height=200");
let loadCount = 0;
function loadHandler() {
loadCount++;
if (loadCount < 2)
return;
let browser1 = win1.document.getElementById("browser");
let browser2 = win2.document.getElementById("browser");
let flo1 = browser1.QueryInterface(Components.interfaces.nsIFrameLoaderOwner);
let flo2 = browser2.QueryInterface(Components.interfaces.nsIFrameLoaderOwner);
let pongCount = 0;
function gotPong(target_ok) {
pongCount++;
ok(target_ok, "message went to correct target");
if (pongCount == 1) {
win1.close();
win2.close();
SimpleTest.finish();
}
}
let mm1 = flo1.frameLoader.messageManager;
let mm2 = flo2.frameLoader.messageManager;
// Swap docshells. Everything should be identical to before, since there was nothing to
// distinguish these docshells.
flo1.swapFrameLoaders(flo2);
// mm1 shouldn't change here, but we update it in case it does due to a bug.
mm1 = flo1.frameLoader.messageManager;
// Load ping-pong code into first window.
mm1.loadFrameScript("data:,addMessageListener('ping', () => sendAsyncMessage('pong'));", false);
// A pong message received in win1 means success.
win1.messageManager.addMessageListener("pong", () => { gotPong(true); });
// A pong message received in win2 means failure!
win2.messageManager.addMessageListener("pong", () => { gotPong(false); });
// Send the ping to win1.
mm1.sendAsyncMessage("ping");
}
win1.addEventListener("load", loadHandler, false);
win2.addEventListener("load", loadHandler, false);
]]>
</script>
</window>