gecko-dev/dom/broadcastchannel/tests/browser_private_browsing.js

/* Any copyright is dedicated to the Public Domain.
 * http://creativecommons.org/publicdomain/zero/1.0/ */

const URL =
  "http://mochi.test:8888/browser/dom/broadcastchannel/tests/blank.html";

add_task(async function() {
  var win1 = OpenBrowserWindow({ private: true });
  var win1Promise = new win1.Promise(resolve => {
    win1.addEventListener(
      "load",
      function() {
        resolve();
      },
      { once: true }
    );
  });
  await win1Promise;

  var win2 = OpenBrowserWindow({ private: false });
  var win2Promise = new win2.Promise(resolve => {
    win2.addEventListener(
      "load",
      function() {
        resolve();
      },
      { once: true }
    );
  });
  await win2Promise;

  var tab1 = BrowserTestUtils.addTab(win1.gBrowser, URL);
  await BrowserTestUtils.browserLoaded(win1.gBrowser.getBrowserForTab(tab1));
  var browser1 = gBrowser.getBrowserForTab(tab1);

  var tab2 = BrowserTestUtils.addTab(win2.gBrowser, URL);
  await BrowserTestUtils.browserLoaded(win2.gBrowser.getBrowserForTab(tab2));
  var browser2 = gBrowser.getBrowserForTab(tab2);

  var p1 = SpecialPowers.spawn(browser1, [], function(opts) {
    return new content.window.Promise(resolve => {
      content.window.bc = new content.window.BroadcastChannel("foobar");
      content.window.bc.onmessage = function(e) {
        resolve(e.data);
      };
    });
  });

  var p2 = SpecialPowers.spawn(browser2, [], function(opts) {
    return new content.window.Promise(resolve => {
      content.window.bc = new content.window.BroadcastChannel("foobar");
      content.window.bc.onmessage = function(e) {
        resolve(e.data);
      };
    });
  });

  await SpecialPowers.spawn(browser1, [], function(opts) {
    return new content.window.Promise(resolve => {
      var bc = new content.window.BroadcastChannel("foobar");
      bc.postMessage("hello world from private browsing");
      resolve();
    });
  });

  await SpecialPowers.spawn(browser2, [], function(opts) {
    return new content.window.Promise(resolve => {
      var bc = new content.window.BroadcastChannel("foobar");
      bc.postMessage("hello world from non private browsing");
      resolve();
    });
  });

  var what1 = await p1;
  is(
    what1,
    "hello world from private browsing",
    "No messages received from the other window."
  );

  var what2 = await p2;
  is(
    what2,
    "hello world from non private browsing",
    "No messages received from the other window."
  );

  BrowserTestUtils.removeTab(tab1);
  await BrowserTestUtils.closeWindow(win1);

  BrowserTestUtils.removeTab(tab2);
  await BrowserTestUtils.closeWindow(win2);
});