browser_grids_grid-outline-cannot-show-outline.js

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/* Any copyright is dedicated to the Public Domain.

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

"use strict";

// Tests that grid outline does not show when cells are too small to be drawn and that

// "Cannot show outline for this grid." message is displayed.

const TEST_URI = `

  <style type='text/css'>

    #grid {

      display: grid;

      grid-template-columns: repeat(51, 20px);

      grid-template-rows: repeat(51, 20px);

  </style>

  <div id="grid">

    <div id="cellA">cell A</div>

    <div id="cellB">cell B</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;

  await selectNode("#grid", inspector);

  const outline = doc.getElementById("grid-outline-container");

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

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

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

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

  const onGridOutlineRendered = waitForDOM(doc, ".grid-outline-text", 1);

  const onCheckboxChange = waitUntilState(

    store,

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

);

  checkbox.click();

  await onHighlighterShown;

  await onCheckboxChange;

  const elements = await onGridOutlineRendered;

  const cannotShowGridOutline = elements[0];

  info(

    "Checking the grid outline is not rendered and an appropriate message is shown."

);

  ok(!outline, "Outline component is not shown.");

ok(

    cannotShowGridOutline,

    "The message 'Cannot show outline for this grid' is displayed."

);

});