browser_webconsole_console_timeStamp.js

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/* Any copyright is dedicated to the Public Domain.

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

// Tests that a console.timeStamp() does not print anything in the console

"use strict";

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

add_task(async function () {

  // We open the console and an empty tab, as we only want to evaluate something.

  const hud = await openNewTabAndConsole(TEST_URI);

  // We execute `console.timeStamp('test')` from the console input.

  execute(hud, "console.timeStamp('test')");

  info(`Checking size`);

  await waitFor(() => findAllMessages(hud).length == 2);

  const [first, second] = findAllMessages(hud).map(message =>

    message.textContent.trim()

);

  info(`Checking first message`);

  is(first, "console.timeStamp('test')", "First message has expected text");

  info(`Checking second message`);

  is(second, "undefined", "Second message has expected text");

});