browser_boxmodel_update-after-reload.js

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/* Any copyright is dedicated to the Public Domain.

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

"use strict";

// Test that the box model view continues to work after the page is reloaded

add_task(async function () {

  const tab = await addTab(URL_ROOT + "doc_boxmodel_iframe1.html");

  const browser = tab.linkedBrowser;

  const { inspector, boxmodel } = await openLayoutView();

  info("Test that the box model view works on the first page");

  await assertBoxModelView(inspector, boxmodel, browser);

  info("Reload the page");

  const onMarkupLoaded = waitForMarkupLoaded(inspector);

  await reloadBrowser();

  await onMarkupLoaded;

  info("Test that the box model view works on the reloaded page");

  await assertBoxModelView(inspector, boxmodel, browser);

});

async function assertBoxModelView(inspector, boxmodel, browser) {

  await selectNode("p", inspector);

  info("Checking that the box model view shows the right value");

  const paddingElt = boxmodel.document.querySelector(

    ".boxmodel-padding.boxmodel-top > span"

);

  is(paddingElt.textContent, "50");

  info("Listening for box model view changes and modifying the padding");

  const onUpdated = waitForUpdate(inspector);

  await setStyle(browser, "p", "padding", "20px");

  await onUpdated;

  ok(true, "Box model view got updated");

  info("Checking that the box model view shows the right value after update");

  is(paddingElt.textContent, "20");