<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>localStorage enable preference test</title>

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

<script type="text/javascript">

SimpleTest.requestCompleteLog();

function checkException(func, exc)
{
  var exceptionThrew = false;
  try {
    func();
  }
  catch (ex) {
    exceptionThrew = true;
    is(ex.name, exc, "Expected "+exc+" exception");
    if (ex.name != exc) {
      info("The exception which was thrown is: " + ex);
    }
  }
  ok(exceptionThrew, "Exception "+exc+" threw");
}

var storage;
function test1() {
  is(typeof(window.localStorage), "object", "Storage is present");
  storage = window.localStorage;

  SpecialPowers.pushPrefEnv({"set": [["dom.storage.enabled", false]]}, test2);
}

function test2() {
  is(window.localStorage, null, "Storage is null");

  checkException(function() {storage.setItem("test", "value");}, "SecurityError");

  SpecialPowers.pushPrefEnv({"set": [["dom.storage.enabled", true]]}, test3);
}

function test3() {
  is(typeof(window.localStorage), "object", "Storage is present again");
  storage.setItem("test", "value");
  is(storage.getItem("test"), "value", "value can be set");
  window.localStorage.clear();
  SimpleTest.finish();
}

function doTest() {
  SpecialPowers.pushPrefEnv({"set": [["dom.storage.enabled", true]]}, test1);
}

SimpleTest.waitForExplicitFinish();

</script>

</head>

<body onload="doTest();">

</body>
</html>
