devtools/client/inspector/rules/test/browser_rules_inherited-properties_02.js


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/* Any copyright is dedicated to the Public Domain.
 http://creativecommons.org/publicdomain/zero/1.0/ */

"use strict";

// Check that no inherited properties appear when the property does not apply
// to the nested element.

const TEST_URI = `
  <style type="text/css">
    #test2 {
      background-color: green;
    }
  </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 emptyInherit(inspector, view);
});

function emptyInherit(inspector, view) {
  // No inheritable styles, this rule shouldn't show up.
  const elementStyle = view._elementStyle;
  is(elementStyle.rules.length, 1, "Should have 1 rule.");

  const elementRule = elementStyle.rules[0];
  ok(
    !elementRule.inherited,
    "Element style attribute should not consider itself inherited."
  );
}