test_bug229915.html

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<!DOCTYPE HTML>

<html>

<!--

https://bugzilla.mozilla.org/show_bug.cgi?id=229915

-->

<head>

  <title>Test for Bug 229915</title>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

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

  <style type="text/css">

  p { color: black; background: transparent; }

  p.prev + p { color: green; }

  p.prev ~ p { background: white; }

  </style>

</head>

<body>

<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=229915">Mozilla Bug 229915</a>

<div id="display">

<div>

  <p id="toinsertbefore">After testing, this should turn green.</p>

</div>

<div>

  <p id="toreplace">To be replaced.</p>

  <p id="replacecolor">After testing, this should turn green.</p>

</div>

<div>

  <p class="prev">Previous paragraph.</p>

  <p id="toremove">To be removed.</p>

  <p id="removecolor">After testing, this should turn green.</p>

</div>

</div>

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

</div>

<pre id="test">

<script class="testbody" type="text/javascript">

/** Test for Bug 229915 **/

const GREEN = "rgb(0, 128, 0)";

const BLACK = "rgb(0, 0, 0)";

const TRANSPARENT = "rgba(0, 0, 0, 0)";

const WHITE = "rgb(255, 255, 255)";

function make_prev() {

  var result = document.createElement("p");

  result.setAttribute("class", "prev");

  var t = document.createTextNode("Dynamically created previous paragraph.");

  result.appendChild(t);

  return result;

function color(id) {

  return getComputedStyle(document.getElementById(id), "").color;

function bg(id) {

  return getComputedStyle(document.getElementById(id), "").backgroundColor;

var node;

// test insert

is(color("toinsertbefore"), BLACK, "initial state (insertion test)");

is(bg("toinsertbefore"), TRANSPARENT, "initial state (insertion test)");

node = document.getElementById("toinsertbefore");

node.parentNode.insertBefore(make_prev(), node);

is(color("toinsertbefore"), GREEN, "inserting should turn node green");

is(bg("toinsertbefore"), WHITE, "inserting should turn background white");

// test replace

is(color("replacecolor"), BLACK, "initial state (replacement test)");

is(bg("replacecolor"), TRANSPARENT, "initial state (replacement test)");

node = document.getElementById("toreplace");

node.parentNode.replaceChild(make_prev(), node);

is(color("replacecolor"), GREEN, "replacing should turn node green");

is(bg("replacecolor"), WHITE, "replacing should turn background white");

// test remove

is(color("removecolor"), BLACK, "initial state (removal test)");

is(bg("removecolor"), WHITE, "initial state (removal test; no change)");

node = document.getElementById("toremove");

node.remove();

is(color("removecolor"), GREEN, "removing should turn node green");

is(bg("removecolor"), WHITE, "removing should leave background");

</script>

</pre>

</body>

</html>