devtools/server/tests/chrome/test_unsafeDereference.html


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<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=837723

When we use Debugger.Object.prototype.unsafeDereference to get a non-D.O
reference to a content object in chrome, that reference should be via an
xray wrapper.
-->
<head>
  <meta charset="utf-8">
  <title>Mozilla Bug 837723</title>
  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css">
</head>
<body>
<pre id="test">
<script>
"use strict";

const {addDebuggerToGlobal} = ChromeUtils.importESModule("resource://gre/modules/jsdebugger.sys.mjs");
addDebuggerToGlobal(globalThis);

window.onload = function() {
  SimpleTest.waitForExplicitFinish();

  const iframe = document.createElement("iframe");
  iframe.src = "http://mochi.test:8888/chrome/devtools/server/tests/chrome/nonchrome_unsafeDereference.html";

  iframe.onload = function() {
    const dbg = new Debugger();
    const contentDO = dbg.addDebuggee(iframe.contentWindow);
    const xhrDesc = contentDO.getOwnPropertyDescriptor("xhr");

    isnot(xhrDesc, undefined, "xhr should be visible as property of content global");
    isnot(xhrDesc.value, undefined, "xhr should have a value");

    const xhr = xhrDesc.value.unsafeDereference();

    is(typeof xhr, "object", "we should be able to deference xhr's value's D.O");
    is(xhr.timeout, 1742, "chrome should see the xhr's 'timeout' property");
    is(xhr.expando, undefined, "chrome should not see the xhr's 'expando' property");

    SimpleTest.finish();
  };

  document.body.appendChild(iframe);
};

</script>
</pre>
</body>
</html>