test_xfo_error_page.html

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<!DOCTYPE HTML>

<html>

<head>

  <title>Bug 1626249: Ensure correct display of neterror page for XFO</title>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />

</head>

<body>

<iframe style="width:100%;" id="xfo_testframe"></iframe>

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

SimpleTest.waitForExplicitFinish();

const XFO_ERROR_PAGE_MSG = "This page has an X-Frame-Options policy that prevents it from being loaded in this context";

let xfo_testframe = document.getElementById("xfo_testframe");

xfo_testframe.onload = function() {

  let wrappedXFOFrame = SpecialPowers.wrap(xfo_testframe.contentWindow);

  let frameContentXFO = wrappedXFOFrame.document.body.innerHTML;

  ok(frameContentXFO.includes(XFO_ERROR_PAGE_MSG), "xfo error page correct");

  SimpleTest.finish();

xfo_testframe.onerror = function() {

  ok(false, "sanity: should not fire onerror for xfo_testframe");

  SimpleTest.finish();

xfo_testframe.src = "file_xfo_error_page.sjs";

</script>

</body>

</html>