test_cloneInto.xhtml

Enable keyboard shortcuts

<?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="Mozilla Bug 503926"

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

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

  <!-- test results are displayed in the html:body -->

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

  <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=964293"

     target="_blank">Cu.cloneInto()</a>

  </body>

  <!-- test code goes here -->

  <script type="application/javascript">

  <![CDATA[

  const TypedArrayThings = [

    'Int8Array',

    'Uint8Array',

    'Uint8ClampedArray',

    'Int16Array',

    'Uint16Array',

    'Int32Array',

    'Uint32Array',

    'Float32Array',

    'Float64Array',

];

  function checkThrows(f, msg, rgxp) {

    try {

      f();

      ok(false, "Should have thrown: " + msg);

    } catch (e) {

      ok(true, "Threw correctly - " + msg + " - " + e);

      if (rgxp)

        ok(rgxp.test(e), "Should throw correct exception: " + e);

  function getType(a) {

    if (a === null || a === undefined)

      return 'null';

    if (Array.isArray(a))

      return 'array';

    if (File.isInstance(a))

      return 'file';

    if (Blob.isInstance(a))

      return 'blob';

    if (TypedArrayThings.includes(a.constructor.name))

      return a.constructor.name;

    if (typeof a == 'object')

      return 'object';

    if (typeof a == 'function')

      return 'function';

    return 'primitive';

  function compare(a, b) {

    is (getType(a), getType(b), 'Type matches');

    var type = getType(a);

    if (type == 'array') {

      is (a.length, b.length, 'Array.length matches');

      for (var i = 0; i < a.length; ++i) {

        compare(a[i], b[i]);

      return;

    if (type == 'file' || type == 'blob') {

      ok ( a === b, 'They should match');

      return;

    if (type == 'object') {

      ok ( a !== b, 'They should not match');

      var aProps = [];

      for (let p in a) aProps.push(p);

      var bProps = [];

      for (let p in b) bProps.push(p);

      is (aProps.length, bProps.length, 'Props match');

      is (aProps.sort().toString(), bProps.sort().toString(), 'Props names match');

      for (let p in a) {

        compare(a[p], b[p]);

      return;

    if (type == 'function') {

      ok ( a !== b, 'They should not match');

      return;

    if (type != 'null') {

      is (a, b, 'Same value');

  var sandboxOptions = {

    wantXrays: true,

    wantExportHelpers: true,

};

  var sandbox = new Cu.Sandbox(window, sandboxOptions);

  // The second sandbox is for testing the exportHelper version of the cloneInto

  var sandbox2 = new Cu.Sandbox("https://example.com", sandboxOptions);

  sandbox.sandbox2 = sandbox2;

  sandbox2.sandbox = sandbox;

  function cloneAndTest(test) {

    var output = sandbox.test = Cu.cloneInto(test, sandbox);

    compare(test, output);

    output = Cu.evalInSandbox('cloneInto(test, sandbox2)', sandbox);

    compare(test, output);

  function cloneAndTestWithFunctions(test) {

    var output = sandbox.test = Cu.cloneInto(test, sandbox, { cloneFunctions: true });

    compare(test, output);

    output = Cu.evalInSandbox('cloneInto(test, sandbox2, { cloneFunctions: true })', sandbox);

    // Note - We need to waive here, because functions are filtered out by object Xrays.

    compare(test, Cu.waiveXrays(output));

  var tests = [

1,

    null,

    true,

    'hello world',

    [1, 2, 3],

    { a: 1, b: 2 },

    new Date(),

    { a: 1, b: {}, c: [1, 2, 3, {} ], e: 'hello world' },

];

  for (var i = 0; i < tests.length; ++i) {

    cloneAndTest(tests[i]);

  checkThrows(function() { Cu.cloneInto({ a() {} }, sandbox); },

              'Function should not be cloned by default');

  checkThrows(function() { Cu.cloneInto({ a: document }, sandbox); },

              'Reflectors should not be wrapped by default');

  var withReflectors = Cu.cloneInto({ doc: document, win: window }, sandbox,

                                    { wrapReflectors: true });

  is(Cu.unwaiveXrays(Cu.waiveXrays(withReflectors).doc), document, "Document passes");

  is(Cu.unwaiveXrays(Cu.waiveXrays(withReflectors).win), window, "Window passes");

  checkThrows(function() { Cu.evalInSandbox('cloneInto({}, sandbox)', sandbox2); },

              'CloneInto should only work on less privileged target scopes.',

              /denied|insecure/);

  var cloneTarget = new Cu.Sandbox("https://example.com");

  var sameOriginSB = new Cu.Sandbox("https://example.com", { wantGlobalProperties: ['XMLHttpRequest'] });

  var crossOriginSB = new Cu.Sandbox("https://example.net", { wantGlobalProperties: ['XMLHttpRequest'] });

  sandbox2.cloneTarget = cloneTarget;

  sandbox2.soXHR = Cu.evalInSandbox('new XMLHttpRequest()', sameOriginSB);

  sandbox2.xoXHR = Cu.evalInSandbox('new XMLHttpRequest()', crossOriginSB);

  sandbox2.chromeDoc = document;

  Cu.evalInSandbox('function tryToClone(x) { return cloneInto({val: x}, cloneTarget, { wrapReflectors: true }).val; }', sandbox2);

  is(Cu.evalInSandbox('tryToClone(soXHR)', sandbox2), sandbox2.soXHR, 'Same-origin wrapReflectors works');

  checkThrows(function() { Cu.evalInSandbox('tryToClone(chromeDoc)', sandbox2); },

              'wrapReflectors may not wrap cross-origin reflectors', /unsupported value type/);

  var test = { a() { return 42; } };

  cloneAndTestWithFunctions(test);

  // Check that inputs are properly passed through cloned functions:

  test = { a(obj) { return obj; } };

  var clonedTest = Cu.cloneInto(test, sandbox, {cloneFunctions: true});

  var testInput = {};

  is(clonedTest.a(testInput), testInput, "Objects should be identical");

]]>

  </script>

</window>