browser_changes_declaration_identical_rules.js

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/* Any copyright is dedicated to the Public Domain.

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

"use strict";

// Test tracking changes to CSS declarations in different stylesheets but in rules

// with identical selectors.

const TEST_URI = `

  <style type='text/css'>

    div {

      color: red;

  </style>

  <style type='text/css'>

    div {

      font-size: 1em;

  </style>

  <div></div>

`;

add_task(async function () {

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

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

  const { document: doc, store } = selectChangesView(inspector);

  await selectNode("div", inspector);

  const prop1 = getTextProperty(ruleView, 1, { "font-size": "1em" });

  const prop2 = getTextProperty(ruleView, 2, { color: "red" });

  let onTrackChange;

  onTrackChange = waitForDispatch(store, "TRACK_CHANGE");

  info("Disable the declaration in the first rule");

  await togglePropStatus(ruleView, prop1);

  info("Wait for change to be tracked");

  await onTrackChange;

  onTrackChange = waitForDispatch(store, "TRACK_CHANGE");

  info("Disable the declaration in the second rule");

  await togglePropStatus(ruleView, prop2);

  info("Wait for change to be tracked");

  await onTrackChange;

  const removeDecl = getRemovedDeclarations(doc);

  is(removeDecl.length, 2, "Two declarations tracked as removed");

  // The last of the two matching rules shows up first in Rule view given that the

  // specificity is the same. This is correct. If the properties were the same, the latest

  // declaration would overwrite the first and thus show up on top.

is(

    removeDecl[0].property,

    "font-size",

    "Correct property name for second declaration"

);

is(

    removeDecl[0].value,

    "1em",

    "Correct property value for second declaration"

);

is(

    removeDecl[1].property,

    "color",

    "Correct property name for first declaration"

);

is(

    removeDecl[1].value,

    "red",

    "Correct property value for first declaration"

);

});