CodeSampleX

示例

jest-worker 30.4.1: Worker

已验证示例 — npm jest-worker 30.4.1: Worker. contract 在 node 22 · linux alpine/x64 · docker 上运行并通过： Worker requires an absolute worker path upon instantiation

sha256:7c3975a90f3e37d46c54c5c93091a808833b5368e8c54d7d897386c515d47194

本网络只提供一件事：能构建的样本。它在沙箱中运行并保留签名回执。它不评级、不担保——同样的代码能否在你的环境构建，它没有测量过。 提交了通过的契约回执的不同签名密钥数量。为 1 表示只有作者；大于 1 表示还有其他人构建过。密钥是自行生成的，背后没有注册身份，因此计的是密钥而非人。 MIT-0

执行证据

声明的环境与签名的运行分开呈现，你可以看到这个样本究竟运行了什么、在哪里运行。

证据依据
签名契约通过
验证回执
1
构建过它的签名密钥
1
声明的环境 node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10

验证运行环境

环境 契约 阶段 运行日期
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…		 2026-08-27

案例

HOW
目标
verify pkg:npm/jest-worker@30.4.1
包
符号
  • Worker
环境
node 22.23.2
创建时间
2026-08-27T22:36:49Z

契约

  1. Worker requires an absolute worker path upon instantiation
  2. Worker supports instantiation with a file URL
  3. Worker executes exposed module methods in parallel worker threads and returns resolved results
  4. Worker propagates exceptions thrown in worker methods as rejected promises
  5. Worker supports custom sticky routing using computeWorkerKey
  6. Worker provides stdout and stderr readable streams via getStdout and getStderr
  7. Worker supports custom TaskQueue implementations including FifoQueue and PriorityQueue
  8. Worker end gracefully terminates the worker farm and rejects subsequent method calls

文件

  • PROMPT.md
  • csx.json
  • package-lock.json
  • package.json
  • spec.json
  • src/index.mjs
  • src/workerService.cjs
  • test/contract.mjs

下载源代码构件 (tar.gz)

源代码

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/jest-worker@30.4.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/jest-worker@30.4.1
Constraints:
  - executionContext: node
Required runtime conditions:
  - ecosystem: npm
  - language: javascript
  - moduleSystem: cjs
  - packageManager: npm@10.9.8
  - runtime: node@22.23.2

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:sha256:47ff3048368e1dd986900b45d1aece9e72173e5f643144917d5f29ae4f93dc8c","constraints":{"executionContext":"node"},"contract":["Worker requires an absolute worker path upon instantiation","Worker supports instantiation with a file URL","Worker executes exposed module methods in parallel worker threads and returns resolved results","Worker propagates exceptions thrown in worker methods as rejected promises","Worker supports custom sticky routing using computeWorkerKey","Worker provides stdout and stderr readable streams via getStdout and getStderr","Worker supports custom TaskQueue implementations including FifoQueue and PriorityQueue","Worker end gracefully terminates the worker farm and rejects subsequent method calls"],"goal":"verify pkg:npm/jest-worker@30.4.1","kind":"HOW","packages":["pkg:npm/jest-worker@30.4.1"],"schemaVersion":1,"symbols":["Worker"]},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","executionContext":"node","language":"javascript","libc":"glibc","libcVersion":"2.39","moduleSystem":"cjs","os":"linux","osVersionBucket":"24","packageManager":"npm","packageManagerVersion":"10.9.8","runtime":"node","runtimeVersion":"22.23.2","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/jest-worker@30.4.1"],"schemaVersion":1,"subject":"pkg:npm/jest-worker@30.4.1","symbols":["Worker"],"verifierAdapter":"node-typescript@1"}
package-lock.json
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}
package.json
{
  "name": "sample-jest-worker",
  "version": "1.0.0",
  "type": "module",
  "private": true,
  "license": "MIT-0",
  "scripts": {
    "test": "node test/contract.mjs"
  },
  "dependencies": {
    "jest-worker": "30.4.1"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/jest-worker@30.4.1",
  "kind": "HOW",
  "packages": [
    "pkg:npm/jest-worker@30.4.1"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "packageManager": "npm@10.9.8",
    "runtime": "node@22.23.2"
  }
}
src/index.mjs
import path from 'node:path';
import { fileURLToPath } from 'node:url';
import { Worker, FifoQueue, PriorityQueue, messageParent } from 'jest-worker';

export { Worker, FifoQueue, PriorityQueue, messageParent };

const __dirname = path.dirname(fileURLToPath(import.meta.url));
export const DEFAULT_WORKER_PATH = path.join(__dirname, 'workerService.cjs');

/**
 * Creates a configured Worker farm for the worker service module.
 * @param {import('jest-worker').WorkerFarmOptions} [options]
 * @returns {Worker}
 */
export function createWorkerFarm(options = {}) {
  return new Worker(DEFAULT_WORKER_PATH, {
    numWorkers: 2,
    enableWorkerThreads: true,
    exposedMethods: [
      'computeSum',
      'computeProduct',
      'processTask',
      'throwingMethod',
      'echoMessage',
    ],
    ...options,
  });
}
src/workerService.cjs
'use strict';

/**
 * Worker service module executed inside worker threads or child processes.
 */

function computeSum(a, b) {
  return a + b;
}

function computeProduct(a, b) {
  return a * b;
}

function processTask(name, payload) {
  return {
    handled: true,
    task: name,
    resultLength: typeof payload === 'string' ? payload.length : 0,
  };
}

function throwingMethod(message) {
  throw new Error(message || 'Worker execution failed');
}

function echoMessage(data) {
  return data;
}

module.exports = {
  computeSum,
  computeProduct,
  processTask,
  throwingMethod,
  echoMessage,
};
test/contract.mjs
import assert from 'node:assert';
import { pathToFileURL } from 'node:url';
import {
  Worker,
  FifoQueue,
  PriorityQueue,
  createWorkerFarm,
  DEFAULT_WORKER_PATH,
} from '../src/index.mjs';

// 1. Worker requires an absolute worker path upon instantiation
{
  assert.throws(
    () => {
      new Worker('relative/path/to/worker.js');
    },
    {
      name: 'Error',
      message: "'workerPath' must be absolute, got 'relative/path/to/worker.js'",
    }
  );
}

// 2. Worker supports instantiation with a file URL
{
  const workerUrl = pathToFileURL(DEFAULT_WORKER_PATH);
  const farm = new Worker(workerUrl, {
    numWorkers: 2,
    enableWorkerThreads: true,
    exposedMethods: ['computeSum'],
  });
  const sum = await farm.computeSum(10, 32);
  assert.strictEqual(sum, 42);
  await farm.end();
}

// 3. Worker executes exposed module methods in parallel worker threads and returns resolved results
{
  const farm = createWorkerFarm();
  const sum = await farm.computeSum(15, 27);
  assert.strictEqual(sum, 42);

  const product = await farm.computeProduct(6, 7);
  assert.strictEqual(product, 42);

  const task = await farm.processTask('build', 'sample-content');
  assert.strictEqual(task.handled, true);
  assert.strictEqual(task.task, 'build');
  assert.strictEqual(task.resultLength, 14);

  const echo = await farm.echoMessage({ ok: true, count: 5 });
  assert.deepStrictEqual(echo, { ok: true, count: 5 });

  await farm.end();
}

// 4. Worker propagates exceptions thrown in worker methods as rejected promises
{
  const farm = createWorkerFarm();
  await assert.rejects(
    async () => {
      await farm.throwingMethod('invalid operation in child thread');
    },
    {
      name: 'Error',
      message: 'invalid operation in child thread',
    }
  );
  await farm.end();
}

// 5. Worker supports custom sticky routing using computeWorkerKey
{
  let keyComputed = false;
  const farm = createWorkerFarm({
    computeWorkerKey: (method, ...args) => {
      keyComputed = true;
      return `sticky-${method}-${args[0]}`;
    },
  });

  const res1 = await farm.computeSum(10, 20);
  assert.strictEqual(res1, 30);
  assert.strictEqual(keyComputed, true);

  await farm.end();
}

// 6. Worker provides stdout and stderr readable streams via getStdout and getStderr
{
  const farm = createWorkerFarm();
  const stdout = farm.getStdout();
  const stderr = farm.getStderr();

  assert.strictEqual(typeof stdout.pipe, 'function');
  assert.strictEqual(typeof stdout.on, 'function');
  assert.strictEqual(typeof stderr.pipe, 'function');
  assert.strictEqual(typeof stderr.on, 'function');

  await farm.end();
}

// 7. Worker supports custom TaskQueue implementations including FifoQueue and PriorityQueue
{
  const fifoFarm = createWorkerFarm({
    taskQueue: new FifoQueue(),
  });
  const fifoRes = await fifoFarm.computeSum(5, 5);
  assert.strictEqual(fifoRes, 10);
  await fifoFarm.end();

  const pqFarm = createWorkerFarm({
    taskQueue: new PriorityQueue((method, a) => (typeof a === 'number' ? a : 0)),
  });
  const pqRes = await pqFarm.computeProduct(3, 4);
  assert.strictEqual(pqRes, 12);
  await pqFarm.end();
}

// 8. Worker end gracefully terminates the worker farm and rejects subsequent method calls
{
  const farm = createWorkerFarm();
  const preCheck = await farm.computeSum(1, 1);
  assert.strictEqual(preCheck, 2);

  const endResult = await farm.end();
  assert.strictEqual(typeof endResult, 'object');

  await assert.rejects(
    async () => {
      await farm.computeSum(1, 2);
    },
    {
      name: 'Error',
      message: 'Farm is ended, no more calls can be done to it',
    }
  );
}

console.log('All jest-worker contract assertions passed.');

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