browser_grids_grid-outline-selected-grid.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 outline is shown when a grid container is selected.

const TEST_URI = `

  <style type='text/css'>

    #grid {

      display: grid;

  </style>

  <div id="grid">

    <div id="cella">Cell A</div>

    <div id="cellb">Cell B</div>

    <div id="cellc">Cell C</div>

  </div>

`;

add_task(async function () {

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

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

  const { document: doc } = gridInspector;

  const { highlighters, store } = inspector;

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

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

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

ok(

    !doc.getElementById("grid-outline-container"),

    "There should be no grid outline shown."

);

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

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

  const onCheckboxChange = waitUntilState(

    store,

    state => state.grids.length == 1 && state.grids[0].highlighted

);

  const onGridOutlineRendered = waitForDOM(doc, "#grid-cell-group rect", 3);

  checkbox.click();

  await onHighlighterShown;

  await onCheckboxChange;

  const elements = await onGridOutlineRendered;

  info("Checking the grid outline is shown.");

  is(elements.length, 3, "Grid outline is shown.");

});