CodeSampleX

示例

@jest/environment 29.7.0

已验证示例 — npm @jest/environment 29.7.0. contract 在 node 22 · linux alpine/x64 · docker 上运行并通过： @jest/environment package.json declares type definitions entry…

sha256:fc3e2200b84226e2793ae0157464aa77761d8814ccda31e8ad278ab1dafa653a

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…		 2026-08-28

案例

HOW
目标
verify pkg:npm/%40jest/environment@29.7.0
包
环境
node 22.23.2
创建时间
2026-08-28T00:34:29Z

契约

  1. @jest/environment package.json declares type definitions entry point ./build/index.d.ts and version 29.7.0
  2. @jest/environment index.d.ts declares JestEnvironment class with constructor, global, fakeTimers, moduleMocker, getVmContext, setup, and teardown methods
  3. @jest/environment index.d.ts declares JestEnvironmentConfig interface containing projectConfig and globalConfig
  4. @jest/environment index.d.ts declares EnvironmentContext type containing console, docblockPragmas, and testPath
  5. @jest/environment index.d.ts declares Jest interface with fake timer controls, module mocking, and test retries
  6. @jest/environment index.d.ts declares ModuleWrapper and JestImportMeta type definitions
  7. CustomTestEnvironment initializes with JestEnvironmentConfig and EnvironmentContext and exposes global state and lifecycle hooks
  8. CustomTestEnvironment setup and teardown manage environment lifecycle and handleTestEvent processes test runner events

文件

  • PROMPT.md
  • csx.json
  • index.mjs
  • package-lock.json
  • package.json
  • spec.json
  • 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/%40jest/environment@29.7.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40jest/environment@29.7.0
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:sha256:5e82452736975c919ec7c7076d92838d2e17f697893fb68cc4d7df85f824596e","constraints":{"executionContext":"node"},"contract":["@jest/environment package.json declares type definitions entry point ./build/index.d.ts and version 29.7.0","@jest/environment index.d.ts declares JestEnvironment class with constructor, global, fakeTimers, moduleMocker, getVmContext, setup, and teardown methods","@jest/environment index.d.ts declares JestEnvironmentConfig interface containing projectConfig and globalConfig","@jest/environment index.d.ts declares EnvironmentContext type containing console, docblockPragmas, and testPath","@jest/environment index.d.ts declares Jest interface with fake timer controls, module mocking, and test retries","@jest/environment index.d.ts declares ModuleWrapper and JestImportMeta type definitions","CustomTestEnvironment initializes with JestEnvironmentConfig and EnvironmentContext and exposes global state and lifecycle hooks","CustomTestEnvironment setup and teardown manage environment lifecycle and handleTestEvent processes test runner events"],"goal":"verify pkg:npm/%40jest/environment@29.7.0","kind":"HOW","packages":["pkg:npm/%40jest/environment@29.7.0"],"schemaVersion":1},"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/%40jest/environment@29.7.0"],"schemaVersion":1,"subject":"pkg:npm/%40jest/environment@29.7.0","verifierAdapter":"node-typescript@1"}
index.mjs
/**
 * Custom Jest Environment conforming to @jest/environment JestEnvironment interface
 */
export class CustomTestEnvironment {
  constructor(config, context) {
    this.config = config;
    this.context = context;
    this.global = {
      ...globalThis,
      testPath: context.testPath,
      customGlobalVar: 'custom_jest_environment_active',
    };
    this.fakeTimers = null;
    this.fakeTimersModern = null;
    this.moduleMocker = null;
    this._isTornDown = false;
  }

  async setup() {
    this.global.__ENVIRONMENT_READY__ = true;
  }

  async teardown() {
    this._isTornDown = true;
    this.global.__ENVIRONMENT_READY__ = false;
  }

  getVmContext() {
    return null;
  }

  handleTestEvent(event, state) {
    if (event && event.name === 'test_start') {
      this.global.__LAST_TEST_STARTED__ = event.test.name;
    }
  }

  exportConditions() {
    return ['node', 'jest-environment'];
  }
}

export function createEnvironmentContext(testPath, docblockPragmas = {}, customConsole = console) {
  return {
    testPath,
    docblockPragmas,
    console: customConsole,
  };
}

export function createJestEnvironmentConfig(projectConfigOverrides = {}, globalConfigOverrides = {}) {
  return {
    projectConfig: {
      rootDir: '/root',
      testEnvironment: 'node',
      ...projectConfigOverrides,
    },
    globalConfig: {
      rootDir: '/root',
      maxWorkers: 1,
      ...globalConfigOverrides,
    },
  };
}
package-lock.json
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  "name": "sample-604355180",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "dependencies": {
        "@jest/environment": "^29.7.0"
      }
    },
    "node_modules/@babel/code-frame": {
      "version": "7.29.7",
      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.29.7.tgz",
      "integrity": "sha512-Aup7aUOfpbAUg2ROOJN6Iw5f9DMBlzu0mIkm/malLQFN/YQgO48wCj0Kxa3sEHJvPVFg7siR+qRInwXd2qhQKw==",
      "license": "MIT",
      "dependencies": {
        "@babel/helper-validator-identifier": "^7.29.7",
        "js-tokens": "^4.0.0",
        "picocolors": "^1.1.1"
      },
      "engines": {
        "node": ">=6.9.0"
      }
    },
    "node_modules/@babel/helper-validator-identifier": {
      "version": "7.29.7",
      "resolved": "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.29.7.tgz",
      "integrity": "sha512-qehxGkRj55h/ff8EMaJ+cYhyaKlHIxqYDn682wQD7RNp9UujOQsHog2uS0r2vzr4pW+sXf90NeeayjcNaX3fFg==",
      "license": "MIT",
      "engines": {
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    "node_modules/@jest/environment": {
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      "dependencies": {
        "@jest/fake-timers": "^29.7.0",
        "@jest/types": "^29.6.3",
        "@types/node": "*",
        "jest-mock": "^29.7.0"
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    "node_modules/@jest/fake-timers": {
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package.json
{
  "name": "verify-jest-environment",
  "version": "1.0.0",
  "type": "module",
  "description": "Verification sample for @jest/environment",
  "license": "MIT-0",
  "scripts": {
    "test": "node test/contract.mjs"
  },
  "dependencies": {
    "@jest/environment": "29.7.0"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/%40jest/environment@29.7.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40jest/environment@29.7.0"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "packageManager": "npm@10.9.8",
    "runtime": "node@22.23.2"
  }
}
test/contract.mjs
import assert from 'node:assert/strict';
import fs from 'node:fs';
import path from 'node:path';
import { createRequire } from 'node:module';
import {
  CustomTestEnvironment,
  createEnvironmentContext,
  createJestEnvironmentConfig,
} from '../index.mjs';

const require = createRequire(import.meta.url);

// 1. @jest/environment package.json declares type definitions entry point ./build/index.d.ts and version 29.7.0
const pkgJsonPath = require.resolve('@jest/environment/package.json');
const pkgJson = JSON.parse(fs.readFileSync(pkgJsonPath, 'utf8'));
assert.equal(pkgJson.name, '@jest/environment');
assert.equal(pkgJson.version, '29.7.0');
assert.equal(pkgJson.types, './build/index.d.ts');
assert.equal(pkgJson.exports['.'].types, './build/index.d.ts');

// 2. @jest/environment index.d.ts declares JestEnvironment class with constructor, global, fakeTimers, moduleMocker, getVmContext, setup, and teardown methods
const dtsPath = path.resolve(path.dirname(pkgJsonPath), pkgJson.types);
assert.ok(fs.existsSync(dtsPath));
const dtsContent = fs.readFileSync(dtsPath, 'utf8');

assert.ok(dtsContent.includes('export declare class JestEnvironment<Timer = unknown> {'));
assert.ok(dtsContent.includes('constructor(config: JestEnvironmentConfig, context: EnvironmentContext);'));
assert.ok(dtsContent.includes('global: Global.Global;'));
assert.ok(dtsContent.includes('fakeTimers: LegacyFakeTimers<Timer> | null;'));
assert.ok(dtsContent.includes('fakeTimersModern: ModernFakeTimers | null;'));
assert.ok(dtsContent.includes('moduleMocker: ModuleMocker | null;'));
assert.ok(dtsContent.includes('getVmContext(): Context | null;'));
assert.ok(dtsContent.includes('setup(): Promise<void>;'));
assert.ok(dtsContent.includes('teardown(): Promise<void>;'));
assert.ok(dtsContent.includes('handleTestEvent?: Circus.EventHandler;'));

// 3. @jest/environment index.d.ts declares JestEnvironmentConfig interface containing projectConfig and globalConfig
assert.ok(dtsContent.includes('export declare interface JestEnvironmentConfig {'));
assert.ok(dtsContent.includes('projectConfig: Config.ProjectConfig;'));
assert.ok(dtsContent.includes('globalConfig: Config.GlobalConfig;'));

// 4. @jest/environment index.d.ts declares EnvironmentContext type containing console, docblockPragmas, and testPath
assert.ok(dtsContent.includes('export declare type EnvironmentContext = {'));
assert.ok(dtsContent.includes('console: Console;'));
assert.ok(dtsContent.includes('docblockPragmas: Record<string, string | Array<string>>;'));
assert.ok(dtsContent.includes('testPath: string;'));

// 5. @jest/environment index.d.ts declares Jest interface with fake timer controls, module mocking, and test retries
assert.ok(dtsContent.includes('export declare interface Jest {'));
assert.ok(dtsContent.includes('advanceTimersByTime(msToRun: number): void;'));
assert.ok(dtsContent.includes('advanceTimersToNextTimer(steps?: number): void;'));
assert.ok(dtsContent.includes('useFakeTimers('));
assert.ok(dtsContent.includes('useRealTimers(): Jest;'));
assert.ok(dtsContent.includes('mock<T = unknown>('));
assert.ok(dtsContent.includes('fn: ModuleMocker[\'fn\'];'));
assert.ok(dtsContent.includes('spyOn: ModuleMocker[\'spyOn\'];'));
assert.ok(dtsContent.includes('retryTimes('));

// 6. @jest/environment index.d.ts declares ModuleWrapper and JestImportMeta type definitions
assert.ok(dtsContent.includes('export declare interface JestImportMeta extends ImportMeta {'));
assert.ok(dtsContent.includes('export declare type ModuleWrapper = ('));

// 7. CustomTestEnvironment initializes with JestEnvironmentConfig and EnvironmentContext and exposes global state and lifecycle hooks
const config = createJestEnvironmentConfig({ testEnvironment: 'custom' });
const context = createEnvironmentContext('/project/test/example.test.js', { customPragma: 'true' });
const env = new CustomTestEnvironment(config, context);

assert.equal(env.config.projectConfig.testEnvironment, 'custom');
assert.equal(env.context.testPath, '/project/test/example.test.js');
assert.equal(env.global.testPath, '/project/test/example.test.js');
assert.equal(env.global.customGlobalVar, 'custom_jest_environment_active');
assert.equal(env.getVmContext(), null);
assert.deepEqual(env.exportConditions(), ['node', 'jest-environment']);

// 8. CustomTestEnvironment setup and teardown manage environment lifecycle and handleTestEvent processes test runner events
await env.setup();
assert.equal(env.global.__ENVIRONMENT_READY__, true);

env.handleTestEvent({ name: 'test_start', test: { name: 'sample suite test case' } });
assert.equal(env.global.__LAST_TEST_STARTED__, 'sample suite test case');

await env.teardown();
assert.equal(env.global.__ENVIRONMENT_READY__, false);
assert.equal(env._isTornDown, true);

console.log('All @jest/environment contract assertions passed.');

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