browser_webconsole_cached_messages_no_duplicate.js

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/* Any copyright is dedicated to the Public Domain.

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

// Test to see if we don't get duplicated messages (cached and "live").

// See Bug 1578138 for more information.

"use strict";

// Log 1 message every 50ms, until we reach 50 messages.

const TEST_URI = `data:text/html,<!DOCTYPE html><meta charset=utf8><script>

    var i = 0;

    var intervalId = setInterval(() => {

      if (i >= 50) {

        clearInterval(intervalId);

        intervalId = null;

        return;

      console.log("startup message " + (++i));

    }, 50);

  </script>`;

add_task(async function () {

  info("Add a tab and open the console");

  const tab = await addTab(TEST_URI, { waitForLoad: false });

  const hud = await openConsole(tab);

  info("wait until all the messages are displayed");

  await waitFor(

    () =>

      findConsoleAPIMessage(hud, "message 1") &&

      findConsoleAPIMessage(hud, "message 50")

);

is(

    (await findAllMessagesVirtualized(hud)).length,

50,

    "We have the expected number of messages"

);

});