browser_devices_get_user_media_screen_tab_close.js

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/* Any copyright is dedicated to the Public Domain.

   http://creativecommons.org/publicdomain/zero/1.0/ */

"use strict";

const TEST_ROOT = getRootDirectory(gTestPath).replace(

  "chrome://mochitests/content/",

  "https://example.com/"

);

const TEST_PAGE = TEST_ROOT + "get_user_media.html";

/**

 * Tests that the given tab is the currently selected tab.

 * @param {Element} aTab - Tab to test.

*/

function testSelected(aTab) {

  is(aTab, gBrowser.selectedTab, "Tab is gBrowser.selectedTab");

  ok(aTab.hasAttribute("selected"), "Tab has attribute 'selected'");

ok(

    aTab.hasAttribute("visuallyselected"),

    "Tab has attribute 'visuallyselected'"

);

/**

 * Tests that when closing a tab with active screen sharing, the screen sharing

 * ends and the tab closes properly.

*/

add_task(async function testScreenSharingTabClose() {

  let initialTab = await BrowserTestUtils.openNewForegroundTab(

    gBrowser,

    "https://example.com"

);

  // Open another foreground tab and ensure its selected.

  let tab = await BrowserTestUtils.openNewForegroundTab(gBrowser, TEST_PAGE);

  testSelected(tab);

  // Start screen sharing in active tab

  await shareDevices(tab.linkedBrowser, false, false, SHARE_WINDOW);

  ok(tab._sharingState.webRTC.screen, "Tab has webRTC screen sharing state");

  let recordingEndedPromise = expectObserverCalled(

    "recording-window-ended",

1,

    tab.linkedBrowser.browsingContext

);

  let tabClosedPromise = BrowserTestUtils.waitForCondition(

    () => gBrowser.selectedTab == initialTab,

    "Waiting for tab to close"

);

  // Close tab

  BrowserTestUtils.removeTab(tab, { animate: true });

  // Wait for screen sharing to end

  await recordingEndedPromise;

  // Wait for tab to be fully closed

  await tabClosedPromise;

  // Test that we're back to the initial tab.

  testSelected(initialTab);

  // There should be no active sharing for the selected tab.

ok(

    !gBrowser.selectedTab._sharingState?.webRTC?.screen,

    "Selected tab doesn't have webRTC screen sharing state"

);

  BrowserTestUtils.removeTab(initialTab);

});