chromium/src/third_party/blink/web_tests/http/tests/devtools/profiler/cpu-profiler-fix-missing-samples.js

 // Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
(async function() {
  TestRunner.addResult(`Tests missing samples are replaced with neighbor stacks.`);
  await TestRunner.loadModule('cpu_profiler_test_runner');
  const profile = {
    startTime: 1000,
    endTime: 4000,
    nodes: [
      {id: 1, hitCount: 0, callFrame: {functionName: '(root)'}, children: [2,3,4,5]},
      {id: 2, hitCount: 1000, callFrame: {functionName: '(garbage collector)'}},
      {id: 3, hitCount: 1000, callFrame: {functionName: '(program)'}},
      {id: 4, hitCount: 1000, callFrame: {functionName: 'bar'}, children: [6]},
      {id: 5, hitCount: 1000, callFrame: {functionName: 'baz'}},
      {id: 6, hitCount: 1000, callFrame: {functionName: 'foo'}}
    ],
    samples: [3, 4, 3, 4, 3, 6, 2, 2, 3, 6, 3, 3, 6, 5, 3, 6]
  };
  profile.timeDeltas = profile.samples.map(_ => 1000);
  profile.endTime = profile.startTime + profile.timeDeltas.length * 1000;
  const rawSamples = profile.samples.slice();
  const model = new SDK.CPUProfileDataModel(profile);
  TestRunner.addResult('Profile tree:');
  printTree('', model.profileHead);
  function printTree(padding, node) {
    TestRunner.addResult(
        `${padding}${node.functionName} id:${node.id} total:${node.total} self:${node.self} depth:${node.depth}`);
    node.children.sort((a, b) => a.id - b.id).forEach(printTree.bind(null, padding + '  '));
  }
  TestRunner.addResult('raw samples: ' + rawSamples.join('  '));
  TestRunner.addResult('samples:     ' + model.samples.join('  '));
  TestRunner.addResult('timestamps: ' + model.timestamps.join('  '));
  TestRunner.addResult('forEachFrame iterator structure:');
  model.forEachFrame(
    (depth, node, ts) =>
      TestRunner.addResult('  '.repeat(depth) + `+ ${depth} ${node.callFrame.functionName} ${ts}`),
    (depth, node, ts, total, self) =>
      TestRunner.addResult('  '.repeat(depth) + `- ${depth} ${node.callFrame.functionName} ${ts} ${total} ${self}`),
  );
  TestRunner.completeTest();
})();