browser_BrowsingContextListener.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 { BrowsingContextListener } = ChromeUtils.importESModule(

  "chrome://remote/content/shared/listeners/BrowsingContextListener.sys.mjs"

);

add_task(async function test_attachedOnNewTab() {

  const listener = new BrowsingContextListener();

  const attached = listener.once("attached");

  listener.startListening();

  const tab = BrowserTestUtils.addTab(gBrowser, "about:blank");

  await BrowserTestUtils.browserLoaded(tab.linkedBrowser);

  const { browsingContext, why } = await attached;

is(

    browsingContext.id,

    tab.linkedBrowser.browsingContext.id,

    "Received expected browsing context"

);

  is(why, "attach", "Browsing context has been attached");

  listener.stopListening();

  gBrowser.removeTab(tab);

});

add_task(async function test_attachedValidEmbedderElement() {

  const listener = new BrowsingContextListener();

  let hasEmbedderElement = false;

  listener.on(

    "attached",

    (evtName, { browsingContext }) => {

      hasEmbedderElement = !!browsingContext.embedderElement;

},

    { once: true }

);

  listener.startListening();

  const tab = BrowserTestUtils.addTab(gBrowser, "about:blank");

  await BrowserTestUtils.browserLoaded(tab.linkedBrowser);

ok(

    hasEmbedderElement,

    "Attached browsing context has a valid embedder element"

);

  listener.stopListening();

  gBrowser.removeTab(tab);

});

add_task(async function test_discardedOnCloseTab() {

  const listener = new BrowsingContextListener();

  const discarded = listener.once("discarded");

  const tab = BrowserTestUtils.addTab(gBrowser, "about:blank");

  const browsingContext = tab.linkedBrowser.browsingContext;

  await BrowserTestUtils.browserLoaded(tab.linkedBrowser);

  listener.startListening();

  gBrowser.removeTab(tab);

  const { browsingContext: discardedBrowsingContext, why } = await discarded;

is(

    discardedBrowsingContext.id,

    browsingContext.id,

    "Received expected browsing context"

);

  is(why, "discard", "Browsing context has been discarded");

  listener.stopListening();

});

add_task(async function test_replaceTopLevelOnNavigation() {

  const listener = new BrowsingContextListener();

  const attached = listener.once("attached");

  const discarded = listener.once("discarded");

  const tab = BrowserTestUtils.addTab(gBrowser, "about:blank");

  const browsingContext = tab.linkedBrowser.browsingContext;

  await BrowserTestUtils.browserLoaded(tab.linkedBrowser);

  listener.startListening();

  await loadURL(tab.linkedBrowser, "about:mozilla");

  const discardEvent = await discarded;

  const attachEvent = await attached;

is(

    discardEvent.browsingContext.id,

    browsingContext.id,

    "Received expected browsing context for discarded"

);

  is(discardEvent.why, "replace", "Browsing context has been replaced");

is(

    attachEvent.browsingContext.id,

    tab.linkedBrowser.browsingContext.id,

    "Received expected browsing context for attached"

);

  is(discardEvent.why, "replace", "Browsing context has been replaced");

  isnot(

    discardEvent.browsingContext,

    attachEvent.browsingContext,

    "Got different browsing contexts"

);

  listener.stopListening();

  gBrowser.removeTab(gBrowser.selectedTab);

});