layout/style/test/test_cascade.html
author Cristian Tuns <ctuns@mozilla.com>
Wed, 22 Sep 2021 08:44:17 -0400
changeset 592892 488c5f6dfe3ead33952f232a52cf0ed4a4208640
parent 469640 c9c0c6f2eed54a187e124942e53c3660b4cf17d8
permissions -rw-r--r--
Backed out 2 changesets (bug 1731223) for likely causing localized Windows builds to break (bug 1732034) a=backout Backed out changeset 0aa04e588a4e (bug 1731223) Backed out changeset 59a15d9c5391 (bug 1731223)

<!DOCTYPE HTML>
<!-- vim: set shiftwidth=4 tabstop=8 autoindent expandtab: -->
<!-- This Source Code Form is subject to the terms of the Mozilla Public
   - License, v. 2.0. If a copy of the MPL was not distributed with this
   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
<html>
<head>
  <title>Test for Author style sheet aspects of CSS cascading</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
  <style type="text/css">

  </style>
</head>
<body id="thebody">
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=">Mozilla Bug </a>
<div class="content_class" id="content" style="position:relative"></div>
<pre id="test">
<script class="testbody" type="text/javascript">

/** Test for Author style sheet aspects of CSS cascading **/

var style_element = document.createElement("style");
var style_contents = document.createTextNode("");
style_element.appendChild(style_contents);
document.getElementsByTagName("head")[0].appendChild(style_element);

var div = document.getElementById("content");
var cs = window.getComputedStyle(div);
var zindex = 0;

/**
 * Given the selectors |sel1| and |sel2|, in that order (the "order"
 * aspect of the cascade), with declarations that are !important if
 * |imp1|/|imp2| are true, assert that the one that wins in the
 * cascading order is given by |winning| (which must be either 1 or 2).
 */
function do_test(sel1, imp1, sel2, imp2, winning) {
  var ind1 = ++zindex;
  var ind2 = ++zindex;
  style_contents.data =
    sel1 + " { z-index: " + ind1 + (imp1 ? "!important" :"") + " } " +
    sel2 + " { z-index: " + ind2 + (imp2 ? "!important" :"") + " } ";
  var result = cs.zIndex;
  is(result, String((winning == 1) ? ind1 : ind2),
     "cascading of " + style_contents.data);
}

// Test order, and order combined with !important
do_test("div", false, "div", false, 2);
do_test("div", false, "div", true, 2);
do_test("div", true, "div", false, 1);
do_test("div", true, "div", true, 2);

// Test specificity on a single element
do_test("div", false, "div.content_class", false, 2);
do_test("div.content_class", false, "div", false, 1);

// Test specificity across elements
do_test("body#thebody div", false, "body div.content_class", false, 1);
do_test("body div.content_class", false, "body#thebody div", false, 2);

// Test specificity combined with !important
do_test("div.content_class", false, "div", false, 1);
do_test("div.content_class", true, "div", false, 1);
do_test("div.content_class", false, "div", true, 2);
do_test("div.content_class", true, "div", true, 1);

function do_test_greater(sel1, sel2) {
  do_test(sel1, false, sel2, false, 1);
  do_test(sel2, false, sel1, false, 2);
}

function do_test_equal(sel1, sel2) {
  do_test(sel1, false, sel2, false, 2);
  do_test(sel2, false, sel1, false, 2);
}

// Test specificity of contents of :not()
do_test_equal("div.content_class", "div:not(.wrong_class)");
do_test_greater("div.content_class.content_class", "div.content_class");
do_test_greater("div.content_class", "div");
do_test_greater("div:not(.wrong_class)", "div");
do_test_greater("div:not(.wrong_class):not(.wrong_class)",
                "div:not(.wrong_class)");

</script>
</pre>
</body>
</html>