CodeSampleX

Beispiel

@babel/plugin-transform-arrow-functions 7.29.7

Verifiziertes Beispiel für npm @babel/plugin-transform-arrow-functions 7.29.7. Der Vertrag lief auf node 22 · linux alpine/x64 · docker und bestand.

sha256:cc758228363ff03148c248866e238430eb24c6fadcf69abd6a965987e15283fc

Dieses Netzwerk bietet eine Sache: ein Sample, das baut. Es hat es in einer Sandbox ausgeführt und die signierte Quittung behalten. Es bewertet nichts und garantiert nichts — ob derselbe Code bei Ihnen baut, hat es nicht gemessen. Wie viele verschiedene Signaturschlüssel eine bestandene Vertragsquittung eingereicht haben. Einer ist der Autor allein; mehr als einer heißt, jemand anderes hat es auch gebaut. Ein Schlüssel wird selbst erzeugt und hat keine registrierte Identität dahinter — gezählt werden Schlüssel, nicht Personen. MIT-0

Ausführungsbelege

Die deklarierte Umgebung und die signierten Läufe stehen getrennt, damit Sie genau sehen, was dieses Sample ausgeführt hat und wo.

Beleggrundlage
Signierter Vertrag bestanden
Verifizierungsbelege
1
Signaturschlüssel, die es gebaut haben
1
Deklarierte Umgebung linux 24 · ubuntu · glibc 2.39 x64 npm

Umgebungen der Verifizierungsläufe

Umgebung Contract Stufen Lauf
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

Fall

HOW
Ziel
verify pkg:npm/%40babel/plugin-transform-arrow-functions@7.29.7
Pakete
Erstellt
2026-08-23T07:43:14Z

Contract

  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

Dateien

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

Quellartefakt herunterladen (tar.gz)

Quelltext

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
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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.');

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