browser_webconsole_observer_notifications.js

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/* Any copyright is dedicated to the Public Domain.

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

"use strict";

const TEST_URI =

  "data:text/html;charset=utf-8,<!DOCTYPE html><p>Web Console test for " +

  "observer notifications";

let created = false;

let destroyed = false;

add_task(async function () {

  setupObserver();

  await openNewTabAndConsole(TEST_URI);

  await waitFor(() => created);

  await closeTabAndToolbox(gBrowser.selectedTab);

  await waitFor(() => destroyed);

  ok(true, "We received both created and destroyed events");

});

function setupObserver() {

  const observer = {

    QueryInterface: ChromeUtils.generateQI(["nsIObserver"]),

    observe: function observe(subject, topic) {

      subject = subject.QueryInterface(Ci.nsISupportsString);

      switch (topic) {

        case "web-console-created":

          Services.obs.removeObserver(observer, "web-console-created");

          created = true;

          break;

        case "web-console-destroyed":

          Services.obs.removeObserver(observer, "web-console-destroyed");

          destroyed = true;

          break;

},

};

  Services.obs.addObserver(observer, "web-console-created");

  Services.obs.addObserver(observer, "web-console-destroyed");