1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/tests/mochitest/test_bug513439.html Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,44 @@
1.4 +<!DOCTYPE HTML>
1.5 +<html>
1.6 +<!--
1.7 +https://bugzilla.mozilla.org/show_bug.cgi?id=513439
1.8 +-->
1.9 +<head>
1.10 + <title>Test for Bug 513439</title>
1.11 + <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
1.12 + <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
1.13 +</head>
1.14 +<body>
1.15 +<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=513439">Mozilla Bug 513439</a>
1.16 +<p id="display"></p>
1.17 +<div id="content" style="display: none">
1.18 +
1.19 +</div>
1.20 +<pre id="test">
1.21 +<script type="application/javascript">
1.22 +
1.23 +/** Test for Bug 513439 **/
1.24 +
1.25 +var prefService = SpecialPowers.Cc["@mozilla.org/preferences-service;1"]
1.26 + .getService(SpecialPowers.Ci.nsIPrefService);
1.27 +var layoutCSSBranch = prefService.getBranch("layout.css.");
1.28 +var oldVal = layoutCSSBranch.getCharPref("devPixelsPerPx");
1.29 +
1.30 +try {
1.31 + var domWindowUtils = SpecialPowers.DOMWindowUtils;
1.32 + var devPxPerCSSPx = domWindowUtils.screenPixelsPerCSSPixel;
1.33 +
1.34 + layoutCSSBranch.setCharPref("devPixelsPerPx", "2");
1.35 + is(domWindowUtils.screenPixelsPerCSSPixel, 2, "devPixelsPerPx wasn't set correctly");
1.36 +
1.37 + layoutCSSBranch.setCharPref("devPixelsPerPx", "1.5");
1.38 + is(domWindowUtils.screenPixelsPerCSSPixel, 1.5, "devPixelsPerPx wasn't set correctly");
1.39 +
1.40 +} finally {
1.41 + layoutCSSBranch.setCharPref("devPixelsPerPx", oldVal);
1.42 +}
1.43 +
1.44 +</script>
1.45 +</pre>
1.46 +</body>
1.47 +</html>
