test_styles-modify.html

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<html>

<!--

https://bugzilla.mozilla.org/show_bug.cgi?id=

-->

<head>

  <meta charset="utf-8">

  <title>Test for Bug </title>

  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>

  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css">

  <script type="application/javascript" src="inspector-helpers.js"></script>

  <script type="application/javascript">

"use strict";

const {isCssPropertyKnown} = require("devtools/server/actors/css-properties");

window.onload = function() {

  SimpleTest.waitForExplicitFinish();

  runNextTest();

};

var gWalker = null;

var gStyles = null;

var gInspectee = null;

addAsyncTest(async function setup() {

  const url = document.getElementById("inspectorContent").href;

  const { target, doc } = await attachURL(url);

  const inspector = await target.getFront("inspector");

  gInspectee = doc;

  gWalker = inspector.walker;

  gStyles = await inspector.getPageStyle();

  runNextTest();

});

addAsyncTest(async function modifyProperties() {

  const localNode = gInspectee.querySelector("#inheritable-rule-inheritable-style");

  const node = await gWalker.querySelector(gWalker.rootNode,

    "#inheritable-rule-inheritable-style");

  const applied = await gStyles.getApplied(node,

    { inherited: false, filter: "user" });

  const elementStyle = applied[0].rule;

  is(elementStyle.cssText, localNode.style.cssText, "Got expected css text");

  // Change an existing property...

  await setProperty(elementStyle, 0, "color", "black");

  // Create a new property

  await setProperty(elementStyle, 1, "background-color", "green");

  // Create a new property and then change it immediately.

  await setProperty(elementStyle, 2, "border", "1px solid black");

  await setProperty(elementStyle, 2, "border", "2px solid black");

  is(elementStyle.cssText,

     "color: black; background-color: green; border: 2px solid black;",

     "Should have expected cssText");

  is(elementStyle.cssText, localNode.style.cssText,

     "Local node and style front match.");

  // Remove all the properties

  await removeProperty(elementStyle, 0, "color");

  await removeProperty(elementStyle, 0, "background-color");

  await removeProperty(elementStyle, 0, "border");

  is(elementStyle.cssText, "", "Should have expected cssText");

  is(elementStyle.cssText, localNode.style.cssText,

     "Local node and style front match.");

  runNextTest();

});

async function setProperty(rule, index, name, value) {

  const changes = rule.startModifyingProperties(isCssPropertyKnown);

  changes.setProperty(index, name, value);

  await changes.apply();

async function removeProperty(rule, index, name) {

  const changes = rule.startModifyingProperties(isCssPropertyKnown);

  changes.removeProperty(index, name);

  await changes.apply();

addTest(function cleanup() {

  gStyles = null;

  gWalker = null;

  gInspectee = null;

  runNextTest();

});

  </script>

</head>

<body>

<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=">Mozilla Bug </a>

<a id="inspectorContent" target="_blank" href="inspector-styles-data.html">Test Document</a>

<p id="display"></p>

<div id="content" style="display: none">

</div>

<pre id="test">

</pre>

</body>

</html>