CodeSampleX

Beispiel

@babel/plugin-transform-async-to-generator 8.0.1

Verifiziertes Beispiel für npm @babel/plugin-transform-async-to-generator 8.0.1. Der Vertrag lief auf node 22 · linux alpine/x64 · docker und bestand.

sha256:e1c3fbc82def7215f00e037dbec2e17753574611a4aa50eb6e35f89326e0cbb1

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 node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10

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…		 2026-08-27

Fall

HOW
Ziel
verify pkg:npm/%40babel/plugin-transform-async-to-generator@8.0.1
Pakete
Umgebung
node 22.23.2
Erstellt
2026-08-27T20:53:55Z

Contract

  1. assert @babel/plugin-transform-async-to-generator exports a Babel plugin factory function
  2. assert async function declaration is transformed into generator function wrapped in _asyncToGenerator
  3. assert async function expression and arrow function are transformed into generator functions
  4. assert async class method and object method are transformed into generator methods
  5. assert transformed async function executes and resolves returned value correctly
  6. assert transformed async function propagates rejected errors properly
  7. assert custom module and method options configure custom coroutine helper import
  8. assert synchronous non-async functions remain untransformed without generator wrapping

Dateien

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

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-async-to-generator@8.0.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40babel/plugin-transform-async-to-generator@8.0.1
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:sha256:5edf3a9a69ace3e38b4200336f9f6ceaaa3cbf45ac0c6cac2aaa38dec65a08e1","constraints":{"executionContext":"node"},"contract":["assert @babel/plugin-transform-async-to-generator exports a Babel plugin factory function","assert async function declaration is transformed into generator function wrapped in _asyncToGenerator","assert async function expression and arrow function are transformed into generator functions","assert async class method and object method are transformed into generator methods","assert transformed async function executes and resolves returned value correctly","assert transformed async function propagates rejected errors properly","assert custom module and method options configure custom coroutine helper import","assert synchronous non-async functions remain untransformed without generator wrapping"],"goal":"verify pkg:npm/%40babel/plugin-transform-async-to-generator@8.0.1","kind":"HOW","packages":["pkg:npm/%40babel/plugin-transform-async-to-generator@8.0.1"],"schemaVersion":1},"contractCommand":["node","test/contract.js"],"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/%40babel/plugin-transform-async-to-generator@8.0.1"],"schemaVersion":1,"subject":"pkg:npm/%40babel/plugin-transform-async-to-generator@8.0.1","verifierAdapter":"node-typescript@1"}
package-lock.json
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package.json
{
  "name": "sample-babel-plugin-transform-async-to-generator",
  "version": "1.0.0",
  "private": true,
  "description": "Clean-room verification sample for @babel/plugin-transform-async-to-generator",
  "main": "src/index.js",
  "scripts": {
    "test": "node test/contract.js"
  },
  "dependencies": {
    "@babel/plugin-transform-async-to-generator": "8.0.1"
  },
  "license": "MIT-0"
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/%40babel/plugin-transform-async-to-generator@8.0.1",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40babel/plugin-transform-async-to-generator@8.0.1"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "packageManager": "npm@10.9.8",
    "runtime": "node@22.23.2"
  }
}
src/index.js
'use strict';

const transformAsyncToGenerator = require('@babel/plugin-transform-async-to-generator');
const babel = require('@babel/core');

/**
 * Transforms JavaScript code using the async-to-generator transform plugin.
 *
 * @param {string} sourceCode - The input JavaScript source code.
 * @param {object} [options] - Options passed to the plugin (e.g. module, method).
 * @returns {string} The transformed JavaScript code.
 */
function transformAsyncCode(sourceCode, options = {}) {
  const plugin = typeof transformAsyncToGenerator.default === 'function'
    ? transformAsyncToGenerator.default
    : transformAsyncToGenerator;

  const plugins = Object.keys(options).length > 0
    ? [[plugin, options]]
    : [plugin];

  const result = babel.transformSync(sourceCode, {
    plugins,
    configFile: false,
    babelrc: false,
  });
  return result ? result.code : '';
}

/**
 * Transforms and executes JavaScript code containing async functions.
 *
 * @param {string} sourceCode - JavaScript snippet that sets or exports a function/value.
 * @param {object} [options] - Plugin options.
 * @returns {*} The evaluated module export or result.
 */
function evaluateAsyncCode(sourceCode, options = {}) {
  const transformed = transformAsyncCode(sourceCode, options);
  const m = { exports: {} };
  const fn = new Function('module', 'exports', transformed);
  fn(m, m.exports);
  return m.exports;
}

module.exports = {
  transformAsyncToGenerator,
  transformAsyncCode,
  evaluateAsyncCode,
};
test/contract.js
'use strict';

const assert = require('node:assert/strict');
const transformAsyncToGenerator = require('@babel/plugin-transform-async-to-generator');
const {
  transformAsyncCode,
  evaluateAsyncCode,
} = require('../src/index.js');

async function runContractTests() {
  // Contract 1: assert @babel/plugin-transform-async-to-generator exports a Babel plugin factory function
  {
    assert.strictEqual(typeof transformAsyncToGenerator, 'object', 'Plugin module should be an object');
    assert.strictEqual(typeof transformAsyncToGenerator.default, 'function', 'Plugin default export should be a function');
  }

  // Contract 2: assert async function declaration is transformed into generator function wrapped in _asyncToGenerator
  {
    const code = `
      async function fetchData(x) {
        const val = await Promise.resolve(x * 2);
        return val + 1;
      }
    `;
    const transformed = transformAsyncCode(code);
    assert.ok(transformed.includes('_asyncToGenerator'), 'Should inject _asyncToGenerator helper');
    assert.ok(transformed.includes('function*'), 'Should transform async body into generator function*');
    assert.ok(!transformed.includes('async function'), 'Should not contain async function declaration in output');
  }

  // Contract 3: assert async function expression and arrow function are transformed into generator functions
  {
    const code = `
      const fnExpr = async function (a, b) {
        return await Promise.resolve(a + b);
      };
      const arrowFn = async (msg) => {
        return await Promise.resolve(msg);
      };
    `;
    const transformed = transformAsyncCode(code);
    assert.ok(transformed.includes('_asyncToGenerator'), 'Should use _asyncToGenerator for expressions and arrow functions');
    assert.ok(transformed.includes('function*'), 'Should convert expressions and arrow functions into generator functions');
    assert.ok(!transformed.includes('async function'), 'Should remove async keyword from function expressions');
    assert.ok(!transformed.includes('async ('), 'Should remove async keyword from arrow functions');
  }

  // Contract 4: assert async class method and object method are transformed into generator methods
  {
    const code = `
      class Service {
        async run(task) {
          return await Promise.resolve(task.toUpperCase());
        }
      }
      const obj = {
        async compute(n) {
          return await Promise.resolve(n * 10);
        }
      };
    `;
    const transformed = transformAsyncCode(code);
    assert.ok(transformed.includes('_asyncToGenerator'), 'Should use _asyncToGenerator for class and object methods');
    assert.ok(transformed.includes('function*'), 'Should transform method bodies into generator functions');
  }

  // Contract 5: assert transformed async function executes and resolves returned value correctly
  {
    const code = `
      module.exports = async function sumAsync(items) {
        let total = 0;
        for (const item of items) {
          total += await Promise.resolve(item);
        }
        return total;
      };
    `;
    const sumAsync = evaluateAsyncCode(code);
    assert.strictEqual(typeof sumAsync, 'function', 'Evaluated module export should be a callable function');

    const promise = sumAsync([10, 20, 30]);
    assert.ok(promise instanceof Promise, 'Transformed function should return a Promise');
    const result = await promise;
    assert.strictEqual(result, 60, 'Resolved promise result should match expected total');
  }

  // Contract 6: assert transformed async function propagates rejected errors properly
  {
    const code = `
      module.exports = async function failingAsync(shouldFail, message) {
        await Promise.resolve();
        if (shouldFail) {
          throw new Error(message);
        }
        return "ok";
      };
    `;
    const failingAsync = evaluateAsyncCode(code);
    const successResult = await failingAsync(false, 'no error');
    assert.strictEqual(successResult, 'ok');

    await assert.rejects(
      async () => {
        await failingAsync(true, 'operation failed');
      },
      {
        name: 'Error',
        message: 'operation failed'
      },
      'Transformed async function should reject when error is thrown'
    );
  }

  // Contract 7: assert custom module and method options configure custom coroutine helper import
  {
    const code = `
      async function processJob(id) {
        return await Promise.resolve(id);
      }
    `;
    const transformed = transformAsyncCode(code, {
      module: 'bluebird',
      method: 'coroutine',
    });
    assert.ok(transformed.includes('import { coroutine as _coroutine } from "bluebird"'), 'Should import custom coroutine from bluebird');
    assert.ok(transformed.includes('_coroutine(function*'), 'Should wrap generator with custom _coroutine');
    assert.ok(!transformed.includes('_asyncToGenerator'), 'Should not use default _asyncToGenerator when custom coroutine is configured');
  }

  // Contract 8: assert synchronous non-async functions remain untransformed without generator wrapping
  {
    const code = `
      function regularSync(a, b) {
        return a + b;
      }
      const syncArrow = (x) => x * 2;
    `;
    const transformed = transformAsyncCode(code);
    assert.ok(!transformed.includes('_asyncToGenerator'), 'Sync functions should not have _asyncToGenerator');
    assert.ok(!transformed.includes('function*'), 'Sync functions should not be transformed to generator functions');
  }

  console.log('All @babel/plugin-transform-async-to-generator contract assertions passed.');
}

runContractTests().catch((err) => {
  console.error(err);
  process.exit(1);
});

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