<!DOCTYPE html>
<html lang="en-US">
<link rel="stylesheet" href="data:text/css,@font-face { font-family: 'MarkA'; src: url(../fonts/markA.ttf); }">
<link rel="stylesheet" href="data:text/css,@font-face { font-family: 'MarkA'; src: url(../fonts/markA.ttf); }">

<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
<style>
  body { font-family: "MarkA"; }
</style>
<div>ABC</div>
<script>
  function runTest() {
    var links = document.getElementsByTagName("link");
    try {
      links[0].sheet.cssRules[0].style.src = "../fonts/markB.ttf";
    } catch(e) {
      todo(false, "Shouldn't throw on set (bug 443978)");
    }

    // Test that the cloned sheet is unaffected.
    isnot(links[1].sheet.cssRules[0].style.src, "../fonts/markB.ttf", "Cloned sheet left unchanged.");

    SimpleTest.finish();
  }

  SimpleTest.waitForExplicitFinish();
  runTest();
</script>
</html>