palemoon-dev/platform/devtools/client/webconsole/test/browser_console_clear_method.js

/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
/* Any copyright is dedicated to the Public Domain.
 * http://creativecommons.org/publicdomain/zero/1.0/ */

// Check that console.clear() does not clear the output of the browser console.

"use strict";

const TEST_URI = "data:text/html;charset=utf8,<p>Bug 1296870";

add_task(function* () {
  yield loadTab(TEST_URI);
  let hud = yield HUDService.toggleBrowserConsole();

  info("Log a new message from the content page");
  ContentTask.spawn(gBrowser.selectedBrowser, {}, function* () {
    content.wrappedJSObject.console.log("msg");
  });
  yield waitForMessage("msg", hud);

  info("Send a console.clear() from the content page");
  ContentTask.spawn(gBrowser.selectedBrowser, {}, function* () {
    content.wrappedJSObject.console.clear();
  });
  yield waitForMessage("Console was cleared", hud);

  info("Check that the messages logged after the first clear are still displayed");
  isnot(hud.outputNode.textContent.indexOf("msg"), -1, "msg is in the output");
});

function waitForMessage(message, webconsole) {
  return waitForMessages({
    webconsole,
    messages: [{
      text: message,
      category: CATEGORY_WEBDEV,
      severity: SEVERITY_LOG,
    }],
  });
}