test_uawidget_scope.js

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/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

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

const {TestUtils} = ChromeUtils.importESModule("resource://testing-common/TestUtils.sys.mjs");

function getWindowlessBrowser(url) {

  let ssm = Services.scriptSecurityManager;

  let uri = NetUtil.newURI(url);

  let principal = ssm.createContentPrincipal(uri, {});

  let webnav = Services.appShell.createWindowlessBrowser(false);

  let docShell = webnav.docShell;

  docShell.createAboutBlankDocumentViewer(principal, principal);

  let document = webnav.document;

  let video = document.createElement("video");

  document.documentElement.appendChild(video);

  let shadowRoot = video.openOrClosedShadowRoot;

  ok(shadowRoot, "should have shadowRoot");

  ok(shadowRoot.isUAWidget(), "ShadowRoot should be a UAWidget");

  equal(Cu.getGlobalForObject(shadowRoot), Cu.getUAWidgetScope(principal),

        "shadowRoot should be in UAWidget scope");

  return webnav;

function StubPolicy(id) {

  return new WebExtensionPolicy({

id,

    mozExtensionHostname: id,

    baseURL: `file:///{id}`,

    allowedOrigins: new MatchPatternSet([]),

    localizeCallback(string) {},

});

// See https://bugzilla.mozilla.org/show_bug.cgi?id=1588356

add_task(async function() {

  let policy = StubPolicy("foo");

  policy.active = true;

  let webnav = getWindowlessBrowser("moz-extension://foo/a.html");

  webnav.close();

  // Wrappers are nuked asynchronously, so wait for that to happen.

  await TestUtils.topicObserved("inner-window-nuked");

  webnav = getWindowlessBrowser("moz-extension://foo/a.html");

  webnav.close();

  policy.active = false;

});