CodeSampleX

Пример

@babel/plugin-transform-arrow-functions 7.29.7

Проверенный пример — npm @babel/plugin-transform-arrow-functions 7.29.7. Контракт выполнен на node 22 · linux alpine/x64 · docker и пройден.

sha256:cc758228363ff03148c248866e238430eb24c6fadcf69abd6a965987e15283fc

Эта сеть предлагает одно: образец, который собирается. Она запустила его в песочнице и сохранила подписанную квитанцию. Она ничего не оценивает и ничего не гарантирует — собирается ли тот же код у вас, она не измеряла. Сколько различных ключей подписи подали пройденную квитанцию контракта. Один — только автор; больше одного — значит, кто-то ещё тоже собрал. Ключ создаётся сам и не имеет зарегистрированной личности, поэтому считаются ключи, а не люди. MIT-0

Свидетельства выполнения

Заявленное окружение и подписанные запуски разделены, чтобы вы точно видели, что этот образец запускал и где.

Основа свидетельства
Подписанный контракт пройден
Квитанции проверки
1
Ключи подписи, собравшие его
1
Заявленная среда linux 24 · ubuntu · glibc 2.39 x64 npm

Среды запусков проверки

Окружение Контракт Этапы Запуск
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

Кейс

HOW
Цель
verify pkg:npm/%40babel/plugin-transform-arrow-functions@7.29.7
Пакеты
Создан
2026-08-23T07:43:14Z

Контракт

  1. Plugin default export is a function factory asserting Babel 7 compatibility
  2. Plugin factory returns an object named transform-arrow-functions with ArrowFunctionExpression visitor method
  3. ArrowFunctionExpression visitor invokes arrowFunctionToExpression with default loose options
  4. ArrowFunctionExpression visitor enables specCompliant and disables noNewArrows when spec option is true
  5. ArrowFunctionExpression visitor prioritizes noNewArrows compiler assumption over spec option
  6. ArrowFunctionExpression visitor skips transformation when node is not an arrow function expression
  7. Module helpers instantiate the plugin and execute arrow function transformations

Файлы

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

Скачать артефакт с исходным кодом (tar.gz)

Исходный код

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/%40babel/plugin-transform-arrow-functions@7.29.7
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40babel/plugin-transform-arrow-functions@7.29.7

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:e2c7e003873289d78610d34d8a10a2276325726d501ef52c4a178312775384c6","contract":["Plugin default export is a function factory asserting Babel 7 compatibility","Plugin factory returns an object named transform-arrow-functions with ArrowFunctionExpression visitor method","ArrowFunctionExpression visitor invokes arrowFunctionToExpression with default loose options","ArrowFunctionExpression visitor enables specCompliant and disables noNewArrows when spec option is true","ArrowFunctionExpression visitor prioritizes noNewArrows compiler assumption over spec option","ArrowFunctionExpression visitor skips transformation when node is not an arrow function expression","Module helpers instantiate the plugin and execute arrow function transformations"],"goal":"verify pkg:npm/%40babel/plugin-transform-arrow-functions@7.29.7","kind":"HOW","packages":["pkg:npm/%40babel/plugin-transform-arrow-functions@7.29.7"],"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/%40babel/plugin-transform-arrow-functions@7.29.7"],"schemaVersion":1,"subject":"pkg:npm/%40babel/plugin-transform-arrow-functions@7.29.7","verifierAdapter":"node-typescript@1"}
package-lock.json
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package.json
{
  "name": "verify-babel-plugin-transform-arrow-functions",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "scripts": {
    "test": "node test/contract.mjs"
  },
  "dependencies": {
    "@babel/plugin-transform-arrow-functions": "7.29.7"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/%40babel/plugin-transform-arrow-functions@7.29.7",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40babel/plugin-transform-arrow-functions@7.29.7"
  ]
}
src/index.mjs
import arrowFunctionsPlugin from '@babel/plugin-transform-arrow-functions';

/**
 * Creates and initializes the arrow-functions plugin instance.
 * @param {object} [api] - Optional Babel API object.
 * @param {object} [options] - Optional plugin options (e.g. { spec: true }).
 * @returns {object} Plugin instance object with name and visitor.
 */
export function createArrowFunctionsPlugin(api, options = {}) {
  const plugin = arrowFunctionsPlugin.default || arrowFunctionsPlugin;
  const babelApi = api || {
    assertVersion: (range) => Boolean(range),
    assumption: () => undefined
  };
  return plugin(babelApi, options);
}

/**
 * Transforms an ArrowFunctionExpression AST path using the arrow-functions visitor.
 * @param {object} pluginInstance - Plugin instance returned by createArrowFunctionsPlugin.
 * @param {object} path - Mock or real Babel AST path for ArrowFunctionExpression.
 */
export function applyArrowFunctionsTransform(pluginInstance, path) {
  if (pluginInstance.visitor && typeof pluginInstance.visitor.ArrowFunctionExpression === 'function') {
    pluginInstance.visitor.ArrowFunctionExpression(path);
  }
}
test/contract.mjs
import assert from 'node:assert/strict';
import arrowFunctionsPlugin from '@babel/plugin-transform-arrow-functions';
import { createArrowFunctionsPlugin, applyArrowFunctionsTransform } from '../src/index.mjs';

// 1. Verify default export is the plugin factory function and asserts Babel 7 compatibility
const plugin = arrowFunctionsPlugin.default || arrowFunctionsPlugin;
assert.equal(typeof plugin, 'function', 'Default export must be a plugin factory function');

let assertedVersion = null;
const mockApi = {
  assertVersion(version) {
    assertedVersion = version;
  },
  assumption(name) {
    return undefined;
  }
};
const instance = plugin(mockApi, {});
assert.equal(assertedVersion, 7, 'Plugin must assert Babel version 7 compatibility');

// 2. Verify plugin structure and visitor
assert.equal(typeof instance, 'object', 'Plugin factory must return an object');
assert.equal(instance.name, 'transform-arrow-functions', 'Plugin name must be transform-arrow-functions');
assert.equal(typeof instance.visitor, 'object', 'Plugin must provide a visitor object');
assert.equal(typeof instance.visitor.ArrowFunctionExpression, 'function', 'Visitor must provide ArrowFunctionExpression method');

// 3. Verify ArrowFunctionExpression visitor invokes arrowFunctionToExpression with default loose options
{
  let passedOpts = null;
  const mockPath = {
    isArrowFunctionExpression: () => true,
    arrowFunctionToExpression: (opts) => {
      passedOpts = opts;
    }
  };
  instance.visitor.ArrowFunctionExpression(mockPath);
  assert.deepEqual(passedOpts, {
    allowInsertArrow: false,
    noNewArrows: true,
    specCompliant: false
  }, 'Default visitor execution must invoke arrowFunctionToExpression with loose configuration');
}

// 4. Verify ArrowFunctionExpression visitor enables specCompliant and disables noNewArrows when spec option is true
{
  const specInstance = plugin(mockApi, { spec: true });
  let passedOpts = null;
  const mockPath = {
    isArrowFunctionExpression: () => true,
    arrowFunctionToExpression: (opts) => {
      passedOpts = opts;
    }
  };
  specInstance.visitor.ArrowFunctionExpression(mockPath);
  assert.deepEqual(passedOpts, {
    allowInsertArrow: false,
    noNewArrows: false,
    specCompliant: true
  }, 'spec option must configure specCompliant: true and noNewArrows: false');
}

// 5. Verify ArrowFunctionExpression visitor prioritizes noNewArrows compiler assumption over spec option
{
  const assumptionApi = {
    assertVersion: () => true,
    assumption: (name) => (name === 'noNewArrows' ? true : undefined)
  };
  const assumptionInstance = plugin(assumptionApi, { spec: true });
  let passedOpts = null;
  const mockPath = {
    isArrowFunctionExpression: () => true,
    arrowFunctionToExpression: (opts) => {
      passedOpts = opts;
    }
  };
  assumptionInstance.visitor.ArrowFunctionExpression(mockPath);
  assert.deepEqual(passedOpts, {
    allowInsertArrow: false,
    noNewArrows: true,
    specCompliant: false
  }, 'Compiler assumption noNewArrows: true must override spec: true');
}

// 6. Verify ArrowFunctionExpression visitor skips transformation when node is not an arrow function expression
{
  let called = false;
  const mockNonArrowPath = {
    isArrowFunctionExpression: () => false,
    arrowFunctionToExpression: () => {
      called = true;
    }
  };
  instance.visitor.ArrowFunctionExpression(mockNonArrowPath);
  assert.equal(called, false, 'Visitor must not invoke arrowFunctionToExpression if isArrowFunctionExpression returns false');
}

// 7. Verify module helpers instantiate the plugin and execute arrow function transformations
{
  const helperInstance = createArrowFunctionsPlugin();
  assert.equal(helperInstance.name, 'transform-arrow-functions');

  let passedOpts = null;
  const mockPath = {
    isArrowFunctionExpression: () => true,
    arrowFunctionToExpression: (opts) => {
      passedOpts = opts;
    }
  };
  applyArrowFunctionsTransform(helperInstance, mockPath);
  assert.deepEqual(passedOpts, {
    allowInsertArrow: false,
    noNewArrows: true,
    specCompliant: false
  }, 'Helper function must execute transformation with expected parameters');
}

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

Исходный сидер

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