test_bug401046.html

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<!DOCTYPE HTML>

<html lang="en">

<!--

https://bugzilla.mozilla.org/show_bug.cgi?id=401046

-->

<head>

  <title>Test for Bug 401046</title>

  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

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

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

  <style type="text/css">

  #display span { margin-bottom: 1em; }

  </style>

</head>

<body>

<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=401046">Mozilla Bug 401046</a>

<p id="display" lang="zh-Hans">

  <span id="s0" style="font-size: 0">汉字</span>

  <span id="s4" style="font-size: 4px">汉字</span>

  <span id="s12" style="font-size: 12px">汉字</span>

  <span id="s28" style="font-size: 28px">汉字</span>

</p>

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

</div>

<pre id="test">

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

/** Test for Bug 401046 **/

SimpleTest.waitForExplicitFinish();

var elts = [

  document.getElementById("s0"),

  document.getElementById("s4"),

  document.getElementById("s12"),

  document.getElementById("s28")

];

function fs(idx) {

  // The computed font size actually *doesn't* currently reflect the

  // minimum font size preference, but things in em units do.  Not sure

  // if this is how it ought to be...

  return getComputedStyle(elts[idx], "").marginBottom;

SpecialPowers.pushPrefEnv({'clear': [['font.minimum-size.zh-CN']]}, step1);

function step1() {

    is(fs(0), "0px", "at min font size 0, 0px should compute to 0px");

    is(fs(1), "4px", "at min font size 0, 4px should compute to 4px");

    is(fs(2), "12px", "at min font size 0, 12px should compute to 12px");

    is(fs(3), "28px", "at min font size 0, 28px should compute to 28px");

    SpecialPowers.pushPrefEnv({'set': [['font.minimum-size.zh-CN', 7]]}, step2);

function step2() {

    is(fs(0), "0px", "at min font size 7, 0px should compute to 0px");

    is(fs(1), "7px", "at min font size 7, 4px should compute to 7px");

    is(fs(2), "12px", "at min font size 7, 12px should compute to 12px");

    is(fs(3), "28px", "at min font size 7, 28px should compute to 28px");

    SpecialPowers.pushPrefEnv({'set': [['font.minimum-size.zh-CN', 18]]}, step3);

function step3() {

    is(fs(0), "0px", "at min font size 18, 0px should compute to 0px");

    is(fs(1), "18px", "at min font size 18, 4px should compute to 18px");

    is(fs(2), "18px", "at min font size 18, 12px should compute to 18px");

    is(fs(3), "28px", "at min font size 18, 28px should compute to 28px");

    SpecialPowers.pushPrefEnv({'clear': [['font.minimum-size.zh-CN']]}, SimpleTest.finish);

</script>

</pre>

</body>

</html>