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+<!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 type="application/javascript" 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>
+SimpleTest.waitForExplicitFinish();
+window.onload = function() {
+ const path = ChromeUtils.saveHeapSnapshot({ runtime: true });
+ const snapshot = ChromeUtils.readHeapSnapshot(path);
+
+ const dominatorTree = snapshot.computeDominatorTree();
+ ok(dominatorTree);
+ ok(dominatorTree instanceof DominatorTree);
+
+ let threw = false;
+ try {
+ new DominatorTree();
+ } catch (e) {
+ threw = true;
+ }
+ ok(threw, "Constructor shouldn't be usable");
+
+ SimpleTest.finish();
+};
+</script>
+</pre>
+</body>
+</html>