browser_computed_refresh-on-style-change_01.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 computed view refreshes when the current node has its style

// changed.

const TEST_URI = "<div id='testdiv' style='font-size:10px;'>Test div!</div>";

add_task(async function () {

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

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

  await selectNode("#testdiv", inspector);

  let fontSize = getComputedViewPropertyValue(view, "font-size");

  is(fontSize, "10px", "The computed view shows the right font-size");

  info("Changing the node's style and waiting for the update");

  const onUpdated = inspector.once("computed-view-refreshed");

  await setContentPageElementAttribute(

    "#testdiv",

    "style",

    "font-size: 15px; color: red;"

);

  await onUpdated;

  fontSize = getComputedViewPropertyValue(view, "font-size");

  is(fontSize, "15px", "The computed view shows the updated font-size");

  const color = getComputedViewPropertyValue(view, "color");

  is(color, "rgb(255, 0, 0)", "The computed view also shows the color now");

});