browser_rules_inherited-properties_01.js

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/* Any copyright is dedicated to the Public Domain.

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

"use strict";

// Check that inherited properties appear for a nested element in the

// rule view.

const TEST_URI = `

  <style type="text/css">

    #test2 {

      background-color: green;

      color: purple;

  </style>

  <div id="test2"><div id="test1">Styled Node</div></div>

`;

add_task(async function () {

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

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

  await selectNode("#test1", inspector);

  await simpleInherit(inspector, view);

});

function simpleInherit(inspector, view) {

  const elementStyle = view._elementStyle;

  is(elementStyle.rules.length, 2, "Should have 2 rules.");

  const elementRule = elementStyle.rules[0];

ok(

    !elementRule.inherited,

    "Element style attribute should not consider itself inherited."

);

  const inheritRule = elementStyle.rules[1];

is(

    inheritRule.selectorText,

    "#test2",

    "Inherited rule should be the one that includes inheritable properties."

);

  ok(!!inheritRule.inherited, "Rule should consider itself inherited.");

  is(inheritRule.textProps.length, 2, "Rule should have two styles");

  const bgcProp = inheritRule.textProps[0];

is(

    bgcProp.name,

    "background-color",

    "background-color property should exist"

);

  ok(bgcProp.invisible, "background-color property should be invisible");

  const inheritProp = inheritRule.textProps[1];

  is(inheritProp.name, "color", "color should have been inherited.");