CodeSampleX

Exemple

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

Échantillon vérifié pour npm @babel/plugin-transform-async-generator-functions 8.0.1. Le contrat s'est exécuté sur node 22 · linux alpine/x64 · docker et a…

sha256:c7e529abd1c19429fdf67e90d2d3bbb5436ead92010c93c60dd4b0cd920dd6a3

Ce réseau offre une seule chose : un échantillon qui compile. Il l'a exécuté dans un bac à sable et conservé le reçu signé. Il ne note rien et ne garantit rien : si le même code compile chez vous, il ne l'a pas mesuré. Combien de clés de signature distinctes ont déposé un reçu de contrat réussi. Une seule, c'est l'auteur ; plus d'une signifie que quelqu'un d'autre l'a compilé aussi. Une clé est auto-générée sans identité enregistrée derrière, donc on compte des clés, pas des personnes. MIT-0

Preuves d'exécution

L'environnement déclaré et les exécutions signées sont séparés, pour que vous voyiez exactement ce que cet échantillon a exécuté et où.

Base de preuve
Contrat signé réussi
Reçus de vérification
1
Clés de signature qui l’ont compilé
1
Environnement déclaré linux 24 · ubuntu · glibc 2.39 x64 npm

Environnements des exécutions de vérification

Environnement Contrat Étapes Exécution
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

Cas

HOW
Objectif
verify pkg:npm/%40babel/plugin-transform-async-generator-functions@8.0.1
Paquets
Créé
2026-08-27T20:51:58Z

Contrat

  1. Plugin default export is a function factory declaring Babel 7 and Babel 8 compatibility
  2. Plugin factory returns an object named transform-async-generator-functions with Program visitor
  3. Program visitor delegates traversal to internal function and loop visitors
  4. Function visitor ignores non-async functions without modification
  5. Function visitor attaches for-await-of visitor to async non-generator functions
  6. Function visitor attaches yield star visitor and flags async_generator_function on async generator functions
  7. Yield star visitor skips arrow functions and delegates yield star expressions with helper calls
  8. For-await visitor skips arrow functions and ignores non-await for-of loops
  9. Module helper utilities create plugin instance, identify async generators, and identify for-await statements

Fichiers

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

Télécharger l’artefact source (tar.gz)

Code source

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-generator-functions@8.0.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40babel/plugin-transform-async-generator-functions@8.0.1

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:dd89764b52a76e4f8612818f65ec08cd02d149b434af65d52ba05c5de20cd394","contract":["Plugin default export is a function factory declaring Babel 7 and Babel 8 compatibility","Plugin factory returns an object named transform-async-generator-functions with Program visitor","Program visitor delegates traversal to internal function and loop visitors","Function visitor ignores non-async functions without modification","Function visitor attaches for-await-of visitor to async non-generator functions","Function visitor attaches yield star visitor and flags async_generator_function on async generator functions","Yield star visitor skips arrow functions and delegates yield star expressions with helper calls","For-await visitor skips arrow functions and ignores non-await for-of loops","Module helper utilities create plugin instance, identify async generators, and identify for-await statements"],"goal":"verify pkg:npm/%40babel/plugin-transform-async-generator-functions@8.0.1","kind":"HOW","packages":["pkg:npm/%40babel/plugin-transform-async-generator-functions@8.0.1"],"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-async-generator-functions@8.0.1"],"schemaVersion":1,"subject":"pkg:npm/%40babel/plugin-transform-async-generator-functions@8.0.1","verifierAdapter":"node-typescript@1"}
package-lock.json
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package.json
{
  "name": "sample-babel-plugin-transform-async-generator-functions",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "scripts": {
    "test": "node test/contract.mjs"
  },
  "dependencies": {
    "@babel/plugin-transform-async-generator-functions": "8.0.1"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/%40babel/plugin-transform-async-generator-functions@8.0.1",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40babel/plugin-transform-async-generator-functions@8.0.1"
  ]
}
src/index.mjs
import asyncGeneratorFunctionsPlugin from '@babel/plugin-transform-async-generator-functions';

/**
 * Creates and initializes the async-generator-functions plugin instance.
 * @param {object} [api] - Optional Babel API object.
 * @param {object} [options] - Optional plugin options.
 * @returns {object} Plugin instance object with name and visitor.
 */
export function createAsyncGeneratorFunctionsPlugin(api, options = {}) {
  const plugin = asyncGeneratorFunctionsPlugin.default || asyncGeneratorFunctionsPlugin;
  const babelApi = api || {
    assertVersion: (range) => Boolean(range)
  };
  return plugin(babelApi, options);
}

/**
 * Checks whether an AST node or path represents an async generator function.
 * @param {object} pathOrNode - AST path or node object.
 * @returns {boolean} True if the node is an async generator function.
 */
export function isAsyncGeneratorFunction(pathOrNode) {
  const node = pathOrNode?.node || pathOrNode;
  return Boolean(node && node.async && node.generator);
}

/**
 * Checks whether an AST node or path represents a for-await-of loop.
 * @param {object} pathOrNode - AST path or node object.
 * @returns {boolean} True if the node is a ForOfStatement with await flag.
 */
export function isForAwaitStatement(pathOrNode) {
  const node = pathOrNode?.node || pathOrNode;
  return Boolean(node && node.type === 'ForOfStatement' && node.await);
}

/**
 * Applies the plugin's Program visitor to an AST path.
 * @param {object} pluginInstance - Plugin instance returned by createAsyncGeneratorFunctionsPlugin.
 * @param {object} path - Babel AST path for Program node.
 * @param {object} [state] - Optional traversal state.
 */
export function applyPluginProgramVisitor(pluginInstance, path, state = {}) {
  if (pluginInstance?.visitor && typeof pluginInstance.visitor.Program === 'function') {
    pluginInstance.visitor.Program(path, state);
  }
}
test/contract.mjs
import assert from 'node:assert/strict';
import asyncGeneratorFunctionsPlugin from '@babel/plugin-transform-async-generator-functions';
import {
  createAsyncGeneratorFunctionsPlugin,
  isAsyncGeneratorFunction,
  isForAwaitStatement,
  applyPluginProgramVisitor
} from '../src/index.mjs';

function invokeVisitor(visitor, nodeType, path, state = {}) {
  const handler = visitor?.[nodeType];
  if (typeof handler === 'function') {
    return handler(path, state);
  }
  if (handler && Array.isArray(handler.enter)) {
    for (const fn of handler.enter) {
      fn(path, state);
    }
  }
}

// 1. Plugin default export is a function factory declaring Babel 7 and Babel 8 compatibility
const plugin = asyncGeneratorFunctionsPlugin.default || asyncGeneratorFunctionsPlugin;
assert.equal(typeof plugin, 'function', 'Default export must be a plugin factory function');

let assertedVersion = null;
const mockApi = {
  assertVersion(version) {
    assertedVersion = version;
  }
};
const instance = plugin(mockApi, {});
assert.equal(assertedVersion, '^7.0.0-0 || ^8.0.0', 'Plugin must assert Babel 7/8 compatibility range');

// 2. Plugin factory returns an object named transform-async-generator-functions with Program visitor
assert.equal(typeof instance, 'object', 'Plugin factory must return an object');
assert.equal(instance.name, 'transform-async-generator-functions', 'Plugin name must be transform-async-generator-functions');
assert.equal(typeof instance.visitor, 'object', 'Plugin must provide a visitor object');
assert.equal(typeof instance.visitor.Program, 'function', 'Visitor must provide Program method');

// 3. Program visitor delegates traversal to internal function and loop visitors
{
  let traversedVisitor = null;
  let traversedState = null;
  const mockProgramPath = {
    traverse(visitor, state) {
      traversedVisitor = visitor;
      traversedState = state;
    }
  };
  const dummyState = { testKey: 'testVal' };
  instance.visitor.Program(mockProgramPath, dummyState);

  assert.ok(traversedVisitor, 'Program visitor must initiate traversal');
  assert.equal(typeof traversedVisitor.Function, 'function', 'Traversed visitor must include Function visitor');
  assert.equal(traversedState, dummyState, 'Program visitor must forward traversal state');
}

// 4. Function visitor ignores non-async functions without modification
{
  let innerTraverseCalled = false;
  let dataSetKey = null;
  const syncFunctionPath = {
    node: { type: 'FunctionDeclaration', async: false, generator: true },
    traverse() {
      innerTraverseCalled = true;
    },
    setData(key) {
      dataSetKey = key;
    }
  };

  let traversedVisitor = null;
  instance.visitor.Program({
    traverse(v) {
      traversedVisitor = v;
    }
  }, {});

  traversedVisitor.Function(syncFunctionPath, {});
  assert.equal(innerTraverseCalled, false, 'Function visitor must ignore non-async functions');
  assert.equal(dataSetKey, null, 'Function visitor must not set metadata on non-async functions');
}

// 5. Function visitor attaches for-await-of visitor to async non-generator functions
{
  let traversedInnerVisitor = null;
  let dataSetKey = null;
  const asyncNonGenPath = {
    node: { type: 'FunctionDeclaration', async: true, generator: false },
    traverse(v) {
      traversedInnerVisitor = v;
    },
    setData(key) {
      dataSetKey = key;
    }
  };

  let traversedVisitor = null;
  instance.visitor.Program({
    traverse(v) {
      traversedVisitor = v;
    }
  }, {});

  traversedVisitor.Function(asyncNonGenPath, {});
  assert.ok(traversedInnerVisitor, 'Async non-generator function must traverse for-await visitor');
  assert.ok(traversedInnerVisitor.ForOfStatement, 'Inner visitor must handle ForOfStatement');
  assert.ok(traversedInnerVisitor.ArrowFunctionExpression, 'Inner visitor must handle ArrowFunctionExpression');
  assert.equal(dataSetKey, null, 'Async non-generator function must not set async_generator_function metadata');
}

// 6. Function visitor attaches yield star visitor and flags async_generator_function on async generator functions
{
  let traversedVisitors = [];
  let attachedData = {};
  const asyncGenPath = {
    node: {
      type: 'FunctionDeclaration',
      async: true,
      generator: true
    },
    traverse(v) {
      traversedVisitors.push(v);
    },
    setData(key, val) {
      attachedData[key] = val;
    }
  };

  let traversedVisitor = null;
  instance.visitor.Program({
    traverse(v) {
      traversedVisitor = v;
    }
  }, {});

  const mockHelperState = {
    addHelper: (name) => ({ type: 'Identifier', name: `_${name}` })
  };

  try {
    traversedVisitor.Function(asyncGenPath, mockHelperState);
  } catch {
    // remapAsyncToGenerator mock boundary is expected
  }

  assert.equal(
    attachedData['@babel/plugin-transform-async-generator-functions/async_generator_function'],
    true,
    'Must set async_generator_function metadata on async generator functions'
  );
  assert.ok(traversedVisitors.some(v => v.YieldExpression), 'Must traverse yield star visitor on async generator functions');
}

// 7. Yield star visitor skips arrow functions and delegates yield star expressions with helper calls
{
  let traversedVisitors = [];
  const asyncGenPath = {
    node: { type: 'FunctionDeclaration', async: true, generator: true },
    traverse(v) {
      traversedVisitors.push(v);
    },
    setData: () => {}
  };

  let traversedVisitor = null;
  instance.visitor.Program({
    traverse(v) {
      traversedVisitor = v;
    }
  }, {});

  const mockHelperState = {
    addHelper: (name) => ({ type: 'Identifier', name: `_${name}` })
  };

  try {
    traversedVisitor.Function(asyncGenPath, mockHelperState);
  } catch {}

  const yieldVisitor = traversedVisitors.find(v => v.YieldExpression);
  assert.ok(yieldVisitor, 'Yield star visitor must be present');

  let arrowSkipped = false;
  invokeVisitor(yieldVisitor, 'ArrowFunctionExpression', {
    isArrowFunctionExpression: () => true,
    skip() {
      arrowSkipped = true;
    }
  });
  assert.equal(arrowSkipped, true, 'Arrow functions must be skipped in yield visitor');

  const nonDelegateYield = {
    node: { type: 'YieldExpression', delegate: false, argument: { type: 'Identifier', name: 'val' } }
  };
  invokeVisitor(yieldVisitor, 'YieldExpression', nonDelegateYield, mockHelperState);
  assert.equal(nonDelegateYield.node.argument.type, 'Identifier', 'Non-delegate yield expression argument is unchanged');

  const delegateYield = {
    node: { type: 'YieldExpression', delegate: true, argument: { type: 'Identifier', name: 'subIter' } }
  };
  invokeVisitor(yieldVisitor, 'YieldExpression', delegateYield, mockHelperState);
  assert.equal(delegateYield.node.argument.type, 'CallExpression', 'Delegated yield argument must become CallExpression');
  assert.equal(delegateYield.node.argument.callee.name, '_asyncGeneratorDelegate', 'Outer call must be asyncGeneratorDelegate helper');
  assert.equal(delegateYield.node.argument.arguments[0].type, 'CallExpression', 'Inner call must be CallExpression');
  assert.equal(delegateYield.node.argument.arguments[0].callee.name, '_asyncIterator', 'Inner call must be asyncIterator helper');
}

// 8. For-await visitor skips arrow functions and ignores non-await for-of loops
{
  let traversedVisitors = [];
  const asyncPath = {
    node: { type: 'FunctionDeclaration', async: true, generator: false },
    traverse(v) {
      traversedVisitors.push(v);
    },
    setData: () => {}
  };

  let traversedVisitor = null;
  instance.visitor.Program({
    traverse(v) {
      traversedVisitor = v;
    }
  }, {});

  traversedVisitor.Function(asyncPath, {});
  const forAwaitVisitor = traversedVisitors.find(v => v.ForOfStatement);
  assert.ok(forAwaitVisitor, 'For-await visitor must be present');

  let forAwaitArrowSkipped = false;
  invokeVisitor(forAwaitVisitor, 'ArrowFunctionExpression', {
    isArrowFunctionExpression: () => true,
    skip() {
      forAwaitArrowSkipped = true;
    }
  });
  assert.equal(forAwaitArrowSkipped, true, 'Arrow functions must be skipped in for-await visitor');

  let nonAwaitTouched = false;
  const nonAwaitPath = {
    node: { type: 'ForOfStatement', await: false },
    ensureBlock() {
      nonAwaitTouched = true;
    }
  };
  invokeVisitor(forAwaitVisitor, 'ForOfStatement', nonAwaitPath, { file: { addHelper: () => {} } });
  assert.equal(nonAwaitTouched, false, 'Non-await ForOfStatement must be ignored');
}

// 9. Module helper utilities create plugin instance, identify async generators, and identify for-await statements
{
  const helperInstance = createAsyncGeneratorFunctionsPlugin();
  assert.equal(helperInstance.name, 'transform-async-generator-functions');

  assert.equal(isAsyncGeneratorFunction({ async: true, generator: true }), true);
  assert.equal(isAsyncGeneratorFunction({ node: { async: true, generator: true } }), true);
  assert.equal(isAsyncGeneratorFunction({ async: true, generator: false }), false);
  assert.equal(isAsyncGeneratorFunction({ async: false, generator: true }), false);
  assert.equal(isAsyncGeneratorFunction(null), false);

  assert.equal(isForAwaitStatement({ type: 'ForOfStatement', await: true }), true);
  assert.equal(isForAwaitStatement({ node: { type: 'ForOfStatement', await: true } }), true);
  assert.equal(isForAwaitStatement({ type: 'ForOfStatement', await: false }), false);
  assert.equal(isForAwaitStatement({ type: 'ForStatement' }), false);
  assert.equal(isForAwaitStatement(null), false);

  let programVisitorCalled = false;
  const mockPath = {
    traverse() {
      programVisitorCalled = true;
    }
  };
  applyPluginProgramVisitor(helperInstance, mockPath);
  assert.equal(programVisitorCalled, true, 'applyPluginProgramVisitor must execute Program visitor');
}

Seeder d'origine

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