browser_grids_grid-list-on-mutation-element-added.js

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/* Any copyright is dedicated to the Public Domain.

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

"use strict";

// Tests that the grid list updates when a new grid container is added to the page.

const TEST_URI = `

  <style type='text/css'>

    .grid {

      display: grid;

  </style>

  <div id="grid1" class="grid">

    <div class="cell1">cell1</div>

    <div class="cell2">cell2</div>

  </div>

  <div id="grid2">

    <div class="cell1">cell1</div>

    <div class="cell2">cell2</div>

  </div>

`;

add_task(async function () {

  await pushPref("devtools.gridinspector.maxHighlighters", 1);

  await addTab("data:text/html;charset=utf-8," + encodeURIComponent(TEST_URI));

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

  const { document: doc } = gridInspector;

  const { highlighters, store } = inspector;

  await selectNode("#grid", inspector);

  const gridList = doc.getElementById("grid-list");

  const checkbox1 = gridList.children[0].querySelector("input");

  info("Checking the initial state of the Grid Inspector.");

  is(gridList.childNodes.length, 1, "One grid container is listed.");

ok(

    !highlighters.gridHighlighters.size,

    "No CSS grid highlighter exists in the highlighters overlay."

);

  info("Toggling ON the CSS grid highlighter from the layout panel.");

  let onHighlighterShown = highlighters.once("grid-highlighter-shown");

  checkbox1.click();

  await onHighlighterShown;

  info("Checking the CSS grid highlighter is created.");

  is(highlighters.gridHighlighters.size, 1, "CSS grid highlighter is shown.");

  info("Adding the #grid2 container in the content page.");

  const onGridListUpdate = waitUntilState(

    store,

    state =>

      state.grids.length == 2 &&

      state.grids[0].highlighted &&

      !state.grids[1].highlighted

);

  SpecialPowers.spawn(gBrowser.selectedBrowser, [], () =>

    content.document.getElementById("grid2").classList.add("grid")

);

  await onGridListUpdate;

  info("Checking the new Grid Inspector state.");

  is(gridList.childNodes.length, 2, "Two grid containers are listed.");

  is(highlighters.gridHighlighters.size, 1, "CSS grid highlighter is shown.");

  const checkbox2 = gridList.children[1].querySelector("input");

  info("Toggling ON the CSS grid highlighter for #grid2.");

  onHighlighterShown = highlighters.once("grid-highlighter-shown");

  let onCheckboxChange = waitUntilState(

    store,

    state =>

      state.grids.length == 2 &&

      !state.grids[0].highlighted &&

      state.grids[1].highlighted

);

  checkbox2.click();

  await onHighlighterShown;

  await onCheckboxChange;

  info("Checking the CSS grid highlighter is still shown.");

  is(highlighters.gridHighlighters.size, 1, "CSS grid highlighter is shown.");

  info("Toggling OFF the CSS grid highlighter from the layout panel.");

  const onHighlighterHidden = highlighters.once("grid-highlighter-hidden");

  onCheckboxChange = waitUntilState(

    store,

    state =>

      state.grids.length == 2 &&

      !state.grids[0].highlighted &&

      !state.grids[1].highlighted

);

  checkbox2.click();

  await onHighlighterHidden;

  await onCheckboxChange;

  info("Checking the CSS grid highlighter is not shown.");

  ok(!highlighters.gridHighlighters.size, "No CSS grid highlighter is shown.");

});