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<title>Test for serialization and equivalence of length units</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
<a target="_blank" href="">Mozilla Bug </a>
<p id="display"></p>
<div id="content" style="display: none">
<pre id="test">
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/** Test for serialization and equivalence of length units **/
* We test that for each of the following:
* + they reserialize to exactly what is given
* + if a mapping is provided, they compute to the same result as the mapping
var tests = {
"1in": "72pt",
"20mm": "2cm",
"2.54cm": "1in",
"36pt": "0.5in",
"4pc": "48pt",
"1em": null,
"3ex": null,
"57px": null,
"5rem": null
var p = document.getElementById("display");
for (var test in tests) {
p.setAttribute("style", "margin-left: " + test);
is("margin-left"), test,
test + " serializes to exactly itself");
var equiv = tests[test];
if (equiv) {
var cm1 = getComputedStyle(p, "").marginLeft; = equiv;
var cm2 = getComputedStyle(p, "").marginLeft;
ok(Math.abs(parseFloat(cm1, 10) - parseFloat(cm2, 10)) <= 0.0001, test + " should compute to the same as " + equiv + ", modulo floating point math error");
p.setAttribute("style", "margin-left: 0");
is("margin-left"), "0px",
"0 serializes to 0px");