<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>sessionStorage basic test</title>

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

<script type="text/javascript">

function setup() {
  sessionStorage.clear();
  SimpleTest.executeSoon(startTest);
}

function startTest()
{
  var util = SpecialPowers.getDOMWindowUtils(window);

  // Check initial state.
  is(sessionStorage.length, 0, "storage is empty");
  is(util.getStorageUsage(sessionStorage), 0, "usage is zero");

  // Add some data.
  sessionStorage.setItem("one", "data");
  var usage = util.getStorageUsage(sessionStorage);
  ok(usage > 0, "storage contains data");

  // Add some more data.
  sessionStorage.setItem("two", "data");
  ok(usage < util.getStorageUsage(sessionStorage), "storage size grew");

  // Remove data.
  sessionStorage.removeItem("two");
  is(util.getStorageUsage(sessionStorage), usage, "storage size shrunk");

  // Cleanup.
  sessionStorage.clear();
  is(sessionStorage.length, 0, "storage is empty");
  is(util.getStorageUsage(sessionStorage), 0, "usage is zero");

  SimpleTest.finish();
}

SimpleTest.waitForExplicitFinish();

</script>

</head>

<body onload="setup();">

</body>
</html>
