test_makeGlobalObjectReference.html

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<!--

https://bugzilla.mozilla.org/show_bug.cgi?id=914405

Debugger.prototype.makeGlobalObjectReference should dereference WindowProxy

(outer window) objects.

-->

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  <meta charset="utf-8">

  <title>Mozilla Bug 914405</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">

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<pre id="test">

<script>

"use strict";

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

addSandboxedDebuggerToGlobal(globalThis);

window.onload = function() {

  SimpleTest.waitForExplicitFinish();

  // Load one of our iframes over http to force it in a different compartment

  // from the current window and the other iframe.

  const iframe = document.createElement("iframe");

  const baseURL = "http://mochi.test:8888/chrome/devtools/server/tests/chrome/";

  iframe.src = baseURL + "iframe1_makeGlobalObjectReference.html";

  iframe.onload = iframeOnLoad;

  document.body.appendChild(iframe);

  function iframeOnLoad() {

    const dbg = new Debugger();

    // 'o' for 'outer window'

    const g1o = iframe.contentWindow;

    ok(!dbg.hasDebuggee(g1o), "iframe is not initially a debuggee");

    // Like addDebuggee, makeGlobalObjectReference innerizes.

    // 'i' stands for 'inner window'.

    // 'DO' stands for 'Debugger.Object'.

    const g1iDO = dbg.makeGlobalObjectReference(g1o);

    ok(!dbg.hasDebuggee(g1o),

       "makeGlobalObjectReference does not add g1 as debuggee, designated via outer");

    ok(!dbg.hasDebuggee(g1iDO),

       "makeGlobalObjectReference does not add g1 as debuggee, designated via D.O ");

    // Wrapping an object automatically outerizes it, so dereferencing an

    // inner object D.O gets you an outer object.

    // ('===' does distinguish inner and outer objects.)

    // (That's a capital '=', if you must know.)

    ok(g1iDO.unsafeDereference() === g1o, "g1iDO has the right referent");

    // However, Debugger.Objects do distinguish inner and outer windows.

    const g1oDO = g1iDO.makeDebuggeeValue(g1o);

    ok(g1iDO !== g1oDO, "makeDebuggeeValue doesn't innerize");

    ok(g1iDO.unsafeDereference() === g1oDO.unsafeDereference(),

       "unsafeDereference() outerizes," +

       " so inner and outer window D.Os both dereference to outer");

    ok(dbg.addDebuggee(g1o) === g1iDO, "addDebuggee returns the inner window's D.O");

    ok(dbg.hasDebuggee(g1o), "addDebuggee adds the correct global");

    ok(dbg.hasDebuggee(g1iDO),

       "hasDebuggee can take a D.O referring to the inner window");

    ok(dbg.hasDebuggee(g1oDO),

       "hasDebuggee can take a D.O referring to the outer window");

    const iframe2 = document.createElement("iframe");

    iframe2.src = "iframe2_makeGlobalObjectReference.html";

    iframe2.onload = iframe2OnLoad;

    document.body.appendChild(iframe2);

    function iframe2OnLoad() {

      // makeGlobalObjectReference dereferences CCWs.

      const g2o = iframe2.contentWindow;

      g2o.g1o = g1o;

      const g2iDO = dbg.addDebuggee(g2o);

      const g2g1oDO = g2iDO.getOwnPropertyDescriptor("g1o").value;

      ok(g2g1oDO !== g1oDO, "g2's cross-compartment wrapper for g1o gets its own D.O");

      ok(g2g1oDO.unwrap() === g1oDO,

         "unwrapping g2's cross-compartment wrapper for g1o gets the right D.O");

      ok(dbg.makeGlobalObjectReference(g2g1oDO) === g1iDO,

         "makeGlobalObjectReference unwraps cross-compartment wrappers, and innerizes");

      SimpleTest.finish();

};

</script>

</pre>

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