tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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test_HeapSnapshot_describeNode_01.js (1094B)

      1 /* Any copyright is dedicated to the Public Domain.
      2   http://creativecommons.org/publicdomain/zero/1.0/ */
      3 "use strict";
      4 
      5 // Test that we can describe nodes with a breakdown.
      6 
      7 function run_test() {
      8  const path = saveNewHeapSnapshot();
      9  const snapshot = ChromeUtils.readHeapSnapshot(path);
     10  ok(snapshot.describeNode);
     11  equal(typeof snapshot.describeNode, "function");
     12 
     13  const dt = snapshot.computeDominatorTree();
     14 
     15  let threw = false;
     16  try {
     17    snapshot.describeNode(undefined, dt.root);
     18  } catch (_) {
     19    threw = true;
     20  }
     21  ok(threw, "Should require a breakdown");
     22 
     23  const breakdown = {
     24    by: "coarseType",
     25    objects: { by: "objectClass" },
     26    scripts: { by: "internalType" },
     27    strings: { by: "internalType" },
     28    other: { by: "internalType" },
     29  };
     30 
     31  threw = false;
     32  try {
     33    snapshot.describeNode(breakdown, 0);
     34  } catch (_) {
     35    threw = true;
     36  }
     37  ok(threw, "Should throw when given an invalid node id");
     38 
     39  const description = snapshot.describeNode(breakdown, dt.root);
     40  ok(description);
     41  ok(description.other);
     42  ok(description.other["JS::ubi::RootList"]);
     43 }