<!DOCTYPE HTML>
<html>
<head>
  <meta charset="utf-8">
  <title>Test the max size of the data parameter of push/replaceState</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
  <script>
    SimpleTest.waitForExplicitFinish();
    function test() {
      let tooLarge = SpecialPowers.getIntPref("browser.history.maxStateObjectSize");
      let allowed = Math.floor(tooLarge / 2);

      history.pushState(new Array(allowed).join("a"), "");
      ok(true, "Adding a state should succeed.");

      try {
        history.pushState(new Array(tooLarge).join("a"), "");
        ok(false, "Adding a too large state object should fail.");
      } catch(ex) {
        ok(true, "Adding a too large state object should fail.");
      }
      SimpleTest.finish();
    }
  </script>
</head>
<body onload="test()">
<p id="display"></p>
<div id="content" style="display: none"></div>
<pre id="test"></pre>
</body>
</html>
