<!DOCTYPE HTML>
<html>
<!--
Sanity test that we can compute dominator trees from a heap snapshot in a web window.
-->
<head>
  <meta charset="utf-8">
  <title>ChromeUtils.saveHeapSnapshot test</title>
  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css">
</head>
<body>
<pre id="test">
<script>
"use strict";
/* global window, ChromeUtils, DominatorTree */

SimpleTest.waitForExplicitFinish();
window.onload = function() {
  const path = ChromeUtils.saveHeapSnapshot({ runtime: true });
  const snapshot = ChromeUtils.readHeapSnapshot(path);

  const dominatorTree = snapshot.computeDominatorTree();
  ok(dominatorTree);
  ok(DominatorTree.isInstance(dominatorTree));

  let threw = false;
  try {
    new DominatorTree();
  } catch (e) {
    threw = true;
  }
  ok(threw, "Constructor shouldn't be usable");

  SimpleTest.finish();
};
</script>
</pre>
</body>
</html>
