gecko/dom/tests/mochitest/chrome/test_clonewrapper.xul

<?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"?>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=667388
-->
<window title="Mozilla Bug 667388"
        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
  <script type="application/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"/>

  <!-- test code goes here -->
  <script type="application/javascript">
  <![CDATA[

  // Setup.
  SimpleTest.waitForExplicitFinish();
  window.testObject = { myNumber: 42,
                        myDomain: window.location.domain };


  // Wait for both frames to load before proceeding.
  var framesLoaded = [null, false, false, false];
  function onFrameLoaded(id) {

    // Mark this frame as loaded.
    framesLoaded[id] = true;

    // Allow it to call |is|.
    window.frames[id].wrappedJSObject.is = is;

    // If all the frames are loaded, start the test.
    if (framesLoaded[1] && framesLoaded[2] && framesLoaded[3])
      startTest();
  }

  function startTest() {

    // Test interaction between chrome and content.
    runChromeContentTest(window.frames[1]);

    // Try same origin.
    runContentContentTest(window.frames[1], window.frames[2],
                          true, "Should be able to clone same-origin");

    // Try cross-origin.
    runContentContentTest(window.frames[2], window.frames[3],
                          false, "Should not be able to clone cross-origin");

    // Colaborate with document.domain, then try again.
    frames[2].document.domain = 'example.org';
    frames[3].document.domain = 'example.org';
    runContentContentTest(window.frames[2], window.frames[3],
                          true, "Should be able to clone cross-origin with document.domain")

    SimpleTest.finish();
  }

  // Tests cloning between chrome and content.
  function runChromeContentTest(contentWin) {

    // We should be able to clone a content object.
    tryToClone(contentWin.wrappedJSObject.testObject,
               true,
               "Chrome should be able to clone content object");

    // Content should not be able to clone a chrome object.
    //
    // Note that because we're using |wrappedJSObject| here, the subject
    // principal is clamed to the principal of the iframe, which is what we want.
    contentWin.wrappedJSObject.tryToClone(window.testObject, false,
                                          "Content should not be able to clone chrome object");
  }

  // Test cloning between content and content.
  //
  // Note - the way we do this is kind of sketchy. Because we're grabbing the
  // test object from win1 by waiving Xray (via .wrappedJSObject), the object
  // we're passing from win1 to win2 is actually the waived object (which has
  // a distinct identity in the compartment of win2). So this means that we're
  // actually giving win2 Xray waivers to win1! This doesn't affect things as
  // long as the security wrappers check documentDomainMakesSameOrigin directly
  // for the puncture case rather than checking IsTransparent(), but it still
  // gives rise to a situation that wouldn't really happen in practice.
  //
  // A more serious issues is that we don't/can't test the Xray wrapper path,
  // because the only native objects that we successfully send through
  // structured clone don't force a parent in PreCreate, and so we _can't_
  // have security wrappers around them (we get a new XPCWN in each
  // compartment). Since the case can't happen, we can't write tests for it.
  // But when it can happen (ie, we fix PreCreate for File, FileList, Blob, etc),
  // we want tests right away, because this stuff is very security-sensitive.
  // So we set this test up to fail when things are fixed, so that the someone
  // will notice and properly augment this test to cover native objects.
  function runContentContentTest(win1, win2, shouldSucceed, msg) {
    win1.wrappedJSObject.tryToClone(win2.wrappedJSObject.testObject,
                                    shouldSucceed, msg);

    var fixMsg = "If this fails, you fixed PreCreate. That's a good thing, ";
    fixMsg += "but now we need some test coverage. See the above comment.";
    win1.wrappedJSObject.tryToClone(win2.wrappedJSObject.blob, true, fixMsg);
    win1.wrappedJSObject.tryToClone(win2.wrappedJSObject.filelist, true, fixMsg);
  }

  function tryToClone(obj, shouldSucceed, message) {
    var success = false;
    var sink = window.frames[0];
    try { sink.postMessage(obj, '*'); success = true; }
    catch (e) { message = message + ' (threw: ' + e.message + ')'; }
    is(success, shouldSucceed, message);
  }

  ]]>
  </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=667388"
     target="_blank">Mozilla Bug 667388</a>
  <iframe id="sink" />
  <!-- The first two are same-origin, the third is not. -->
  <iframe id="frame1" onload="onFrameLoaded(1);" src="http://test1.example.org/tests/dom/tests/mochitest/general/file_clonewrapper.html" />
  <iframe id="frame2" onload="onFrameLoaded(2);" src="http://test1.example.org/tests/dom/tests/mochitest/general/file_clonewrapper.html" />
  <iframe id="frame3" onload="onFrameLoaded(3);" src="http://test2.example.org/tests/dom/tests/mochitest/general/file_clonewrapper.html" />
  </body>

</window>