test_ext_adoption_with_xrays.js

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"use strict";

// ExtensionContent.sys.mjs needs to know when it's running from xpcshell,

// to use the right timeout for content scripts executed at document_idle.

ExtensionTestUtils.mockAppInfo();

const server = createHttpServer();

server.registerDirectory("/data/", do_get_file("data"));

const BASE_URL = `http://localhost:${server.identity.primaryPort}/data`;

add_task(async function test_contentscript_xrays() {

  async function contentScript() {

    let node = window.document.createElement("div");

    node.expando = 5;

    browser.test.assertEq(

      node.expando,

5,

      "We should be able to see our expando"

);

    browser.test.assertEq(

      node.wrappedJSObject.expando,

      undefined,

      "Underlying object should not have our expando"

);

    window.frames[0].document.adoptNode(node);

    browser.test.assertEq(

      node.expando,

5,

      "Adoption should not change expandos"

);

    browser.test.assertEq(

      node.wrappedJSObject.expando,

      undefined,

      "Adoption should really not change expandos"

);

    // Repeat but now with an object that has a reference from the

    // window it's being cloned into.

    node = window.document.createElement("div");

    node.expando = 6;

    browser.test.assertEq(

      node.expando,

6,

      "We should be able to see our expando (2)"

);

    browser.test.assertEq(

      node.wrappedJSObject.expando,

      undefined,

      "Underlying object should not have our expando (2)"

);

    window.frames[0].wrappedJSObject.incoming = node.wrappedJSObject;

    window.frames[0].document.adoptNode(node);

    browser.test.assertEq(

      node.expando,

6,

      "Adoption should not change expandos (2)"

);

    browser.test.assertEq(

      node.wrappedJSObject.expando,

      undefined,

      "Adoption should really not change expandos (2)"

);

    // Repeat once more, now with an expando that refers to the object itself.

    node = window.document.createElement("div");

    node.expando = node;

    browser.test.assertEq(

      node.expando,

      node,

      "We should be able to see our self-referential expando (3)"

);

    browser.test.assertEq(

      node.wrappedJSObject.expando,

      undefined,

      "Underlying object should not have our self-referential expando (3)"

);

    window.frames[0].document.adoptNode(node);

    browser.test.assertEq(

      node.expando,

      node,

      "Adoption should not change self-referential expando (3)"

);

    browser.test.assertEq(

      node.wrappedJSObject.expando,

      undefined,

      "Adoption should really not change self-referential expando (3)"

);

    // And test what happens if we now set document.domain and cause

    // wrapper remapping.

    let doc = window.frames[0].document;

    // eslint-disable-next-line no-self-assign

    doc.domain = doc.domain;

    browser.test.notifyPass("contentScriptAdoptionWithXrays");

  let extension = ExtensionTestUtils.loadExtension({

    manifest: {

      content_scripts: [

          matches: ["http://*/*/file_toplevel.html"],

          js: ["content_script.js"],

},

],

},

    files: {

      "content_script.js": contentScript,

},

});

  await extension.startup();

  let contentPage = await ExtensionTestUtils.loadContentPage(

    `${BASE_URL}/file_toplevel.html`

);

  await extension.awaitFinish("contentScriptAdoptionWithXrays");

  await contentPage.close();

  await extension.unload();

});