browser_rules_grid-highlighter-on-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 a grid highlighter showing grid gaps can be displayed after reloading the

// page (Bug 1342051).

const TEST_URI = `

  <style type='text/css'>

    #grid {

      display: grid;

      grid-gap: 10px;

  </style>

  <div id="grid">

    <div id="cell1">cell1</div>

    <div id="cell2">cell2</div>

  </div>

`;

add_task(async function () {

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

  info("Check that the grid highlighter can be displayed");

  await checkGridHighlighter();

  info("Close the toolbox before reloading the tab");

  await gDevTools.closeToolboxForTab(gBrowser.selectedTab);

  await reloadBrowser();

  info(

    "Check that the grid highlighter can be displayed after reloading the page"

);

  await checkGridHighlighter();

});

async function checkGridHighlighter() {

  const { inspector, view } = await openRuleView();

  const { highlighters } = inspector;

  const HIGHLIGHTER_TYPE = inspector.highlighters.TYPES.GRID;

  const { waitForHighlighterTypeShown } = getHighlighterTestHelpers(inspector);

  await selectNode("#grid", inspector);

  const container = getRuleViewProperty(view, "#grid", "display").valueSpan;

  const gridToggle = container.querySelector(".js-toggle-grid-highlighter");

  info("Toggling ON the CSS grid highlighter from the rule-view.");

  const onHighlighterShown = waitForHighlighterTypeShown(HIGHLIGHTER_TYPE);

  gridToggle.click();

  await onHighlighterShown;

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