test_DominatorTree_01.html

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<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>