CodeSampleX

サンプル

puppeteer-core 24.4.0

検証済みサンプル — npm puppeteer-core 24.4.0. node 22 · linux alpine/x64 · docker で contract を実行し、成功しました: assert puppeteer._isPuppeteerCore is true

sha256:324d1beade001aad063805874760963ec2d7c18a6e8eb473168ab5637714a00c

このネットワークが提供するのは一つだけです。ビルドされるサンプル。サンドボックスで実行し、署名済みの受領証を保管します。等級はつけず、何も保証しません — 同じコードがあなたの環境でビルドされるかは測定していません。 合格した契約受領証を提出した異なる署名鍵の数です。1 なら作者だけ、2 以上なら他の誰かもビルドしています。鍵は自己生成で背後に登録された身元がないため、数えているのは人ではなく鍵です。 MIT-0

実行証拠

宣言された環境と署名済みの実行を分けてあります。このサンプルが何をどこで実行したかをそのまま確認できます。

証拠の基準
署名済みコントラクト合格
検証レシート
1
ビルドした署名鍵
1
宣言された環境 linux 24 · ubuntu · glibc 2.39 x64 npm

検証実行環境

環境 コントラクト ステージ 実行日
node 22 · linux alpine/x64 · docker ed25519:c1973797be207ac4 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1node:22-alpine@sha256:c610fcdfb1d5…		 2026-08-23

ケース

HOW
ゴール
verify pkg:npm/puppeteer-core@24.4.0
パッケージ
作成日
2026-08-23T15:23:47Z

コントラクト

  1. assert puppeteer._isPuppeteerCore is true
  2. assert puppeteer.launch requires executablePath or channel in puppeteer-core
  3. assert puppeteer.connect requires exactly one connection option
  4. assert puppeteer.launch rejects with descriptive error when executablePath is invalid
  5. assert KnownDevices provides mobile device descriptors including iPhone 15
  6. assert PredefinedNetworkConditions provides network emulation profiles including Slow 3G and Fast 4G
  7. assert puppeteer.defaultArgs generates standard Chromium launch arguments including user flags
  8. assert TimeoutError, PuppeteerError, and ProtocolError are exported Error subclasses

ファイル

  • PROMPT.md
  • csx.json
  • index.js
  • package-lock.json
  • package.json
  • spec.json
  • test/contract.mjs

ソースアーティファクトをダウンロード (tar.gz)

ソース

PROMPT.md
Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: verify pkg:npm/puppeteer-core@24.4.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/puppeteer-core@24.4.0

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.
csx.json
{"case":{"caseId":"case:sha256:4ec7e0a2bdec4e5e04d2f9371e36539a77fd11f8e60fab339d836b9cc99649a9","contract":["assert puppeteer._isPuppeteerCore is true","assert puppeteer.launch requires executablePath or channel in puppeteer-core","assert puppeteer.connect requires exactly one connection option","assert puppeteer.launch rejects with descriptive error when executablePath is invalid","assert KnownDevices provides mobile device descriptors including iPhone 15","assert PredefinedNetworkConditions provides network emulation profiles including Slow 3G and Fast 4G","assert puppeteer.defaultArgs generates standard Chromium launch arguments including user flags","assert TimeoutError, PuppeteerError, and ProtocolError are exported Error subclasses"],"goal":"verify pkg:npm/puppeteer-core@24.4.0","kind":"HOW","packages":["pkg:npm/puppeteer-core@24.4.0"],"schemaVersion":1},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"npm","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/puppeteer-core@24.4.0"],"schemaVersion":1,"subject":"pkg:npm/puppeteer-core@24.4.0","verifierAdapter":"node-typescript@1"}
index.js
import puppeteer, {
  KnownDevices,
  PredefinedNetworkConditions,
  TimeoutError,
  PuppeteerError,
  ProtocolError
} from 'puppeteer-core';

/**
 * Checks if the loaded puppeteer module is puppeteer-core.
 *
 * @returns {boolean} True if puppeteer-core.
 */
export function isPuppeteerCore() {
  return puppeteer._isPuppeteerCore === true;
}

/**
 * Gets a known mobile or tablet device descriptor by name.
 *
 * @param {string} deviceName - Name of the device.
 * @returns {import('puppeteer-core').Device | undefined} Device descriptor object or undefined.
 */
export function getDeviceDescriptor(deviceName) {
  return KnownDevices[deviceName];
}

/**
 * Gets predefined network emulation conditions.
 *
 * @param {'Slow 3G' | 'Fast 3G' | 'Slow 4G' | 'Fast 4G'} conditionName - Network condition name.
 * @returns {import('puppeteer-core').NetworkConditions | undefined} Network condition metrics.
 */
export function getNetworkCondition(conditionName) {
  return PredefinedNetworkConditions[conditionName];
}

/**
 * Gets default launch arguments computed for Chromium by Puppeteer.
 *
 * @param {import('puppeteer-core').PuppeteerNodeLaunchOptions} [options] - Launch options.
 * @returns {string[]} List of command-line flags.
 */
export function getChromiumDefaultArgs(options) {
  return puppeteer.defaultArgs(options);
}

export {
  puppeteer,
  KnownDevices,
  PredefinedNetworkConditions,
  TimeoutError,
  PuppeteerError,
  ProtocolError
};
package-lock.json
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      }
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        "semver": "^7.7.1",
        "tar-fs": "^3.0.8",
        "yargs": "^17.7.2"
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package.json
{
  "name": "sample-puppeteer-core-verification",
  "version": "1.0.0",
  "description": "Clean-room sample verifying pkg:npm/puppeteer-core@24.4.0",
  "main": "index.js",
  "type": "module",
  "license": "MIT-0",
  "dependencies": {
    "puppeteer-core": "24.4.0"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/puppeteer-core@24.4.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/puppeteer-core@24.4.0"
  ]
}
test/contract.mjs
import assert from 'node:assert';
import puppeteer, {
  KnownDevices,
  PredefinedNetworkConditions,
  TimeoutError,
  PuppeteerError,
  ProtocolError
} from 'puppeteer-core';
import {
  isPuppeteerCore,
  getDeviceDescriptor,
  getNetworkCondition,
  getChromiumDefaultArgs
} from '../index.js';

// 1. puppeteer._isPuppeteerCore flag verification
assert.strictEqual(isPuppeteerCore(), true, 'isPuppeteerCore() must return true');
assert.strictEqual(puppeteer._isPuppeteerCore, true, 'puppeteer._isPuppeteerCore must be true');

// 2. puppeteer.launch without executablePath or channel rejects in puppeteer-core
await assert.rejects(
  async () => {
    await puppeteer.launch();
  },
  (err) => {
    assert(err instanceof Error);
    assert.match(err.message, /An `executablePath` or `channel` must be specified for `puppeteer-core`/);
    return true;
  }
);

// 3. puppeteer.connect requires connection options
await assert.rejects(
  async () => {
    await puppeteer.connect({});
  },
  (err) => {
    assert(err instanceof Error);
    assert.match(err.message, /Exactly one of browserWSEndpoint, browserURL or transport must be passed to puppeteer.connect/);
    return true;
  }
);

// 4. puppeteer.launch with non-existent executablePath rejects
await assert.rejects(
  async () => {
    await puppeteer.launch({ executablePath: '/nonexistent/mock/path' });
  },
  (err) => {
    assert(err instanceof Error);
    assert.match(err.message, /Browser was not found at the configured executablePath/);
    return true;
  }
);

// 5. KnownDevices verification
const iphone = getDeviceDescriptor('iPhone 15');
assert(iphone, 'KnownDevices["iPhone 15"] must be defined');
assert.strictEqual(iphone.name, 'iPhone 15');
assert.strictEqual(typeof iphone.userAgent, 'string');
assert(iphone.userAgent.includes('iPhone OS 17_5'));
assert.deepStrictEqual(iphone.viewport, {
  width: 393,
  height: 659,
  deviceScaleFactor: 3,
  isMobile: true,
  hasTouch: true,
  isLandscape: false
});

// 6. PredefinedNetworkConditions verification
const slow3G = getNetworkCondition('Slow 3G');
assert.deepStrictEqual(slow3G, {
  download: 50000,
  upload: 50000,
  latency: 2000
});
const fast4G = getNetworkCondition('Fast 4G');
assert.deepStrictEqual(fast4G, {
  download: 1012500,
  upload: 168750,
  latency: 165
});

// 7. puppeteer.defaultArgs argument generation
const defaultArgs = getChromiumDefaultArgs({
  args: ['--custom-test-flag']
});
assert(Array.isArray(defaultArgs));
assert(defaultArgs.includes('--custom-test-flag'));
assert(defaultArgs.some(arg => arg.startsWith('--disable-background-networking')));

// 8. Error classes
const timeoutErr = new TimeoutError('Navigation timeout of 30000 ms exceeded');
assert(timeoutErr instanceof Error);
assert.strictEqual(timeoutErr.name, 'TimeoutError');
assert.strictEqual(timeoutErr.message, 'Navigation timeout of 30000 ms exceeded');

const puppeteerErr = new PuppeteerError('General puppeteer error');
assert(puppeteerErr instanceof Error);
assert.strictEqual(puppeteerErr.name, 'PuppeteerError');

const protocolErr = new ProtocolError('Protocol error message');
assert(protocolErr instanceof Error);
assert.strictEqual(protocolErr.name, 'ProtocolError');

console.log('Contract assertions passed.');

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