Exemplo

@babel/plugin-syntax-async-generators 7.8.4: parse async generator function syntax using @babel/plugin-syntax-async-generators

Amostra verificada para npm @babel/plugin-syntax-async-generators 7.8.4: parse async generator function syntax using @babel/plugin-syntax-async-generators. O…

sha256:e8d76b8054a579c05a5b0c37864379a38051fbd536a346e5ec7e1debc67368ff

MIT-0

Evidência de execução

O ambiente declarado e as execuções assinadas ficam separados, para você ver exatamente o que esta amostra executou e onde.

Base da evidência: Contrato assinado aprovado
Recibos de verificação: 1
Chaves de assinatura que o compilaram: 1

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

Ambientes das execuções de verificação

Ambiente	Contrato	Etapas	Execução
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…	2026-08-26

Caso

HOW

Objetivo: parse async generator function syntax using @babel/plugin-syntax-async-generators
Pacotes: @babel/plugin-syntax-async-generators 7.8.4
Símbolos: @babel/plugin-syntax-async-generators
Ambiente: node 22.23.2
Criado: 2026-08-26T14:17:25Z

Contrato

plugin exports a default plugin factory asserting Babel 7 compatibility
plugin factory returns plugin descriptor with name syntax-async-generators
manipulateOptions appends asyncGenerators to parser plugins list
manipulateOptions preserves existing parser plugins when adding asyncGenerators
configureParserOptions helper creates plugin instance and updates parserOpts
hasAsyncGeneratorsSyntax accurately checks presence of asyncGenerators in parser options

Arquivos

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

Baixar o artefato de código-fonte (tar.gz)

Código-fonte

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: parse async generator function syntax using @babel/plugin-syntax-async-generators
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40babel/plugin-syntax-async-generators@7.8.4
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

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package-lock.json

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package.json

{
  "name": "sample-babel-plugin-syntax-async-generators",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "license": "MIT-0",
  "dependencies": {
    "@babel/plugin-syntax-async-generators": "7.8.4"
  }
}

spec.json

{
  "schemaVersion": 1,
  "goal": "parse async generator function syntax using @babel/plugin-syntax-async-generators",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40babel/plugin-syntax-async-generators@7.8.4"
  ],
  "symbols": [
    "@babel/plugin-syntax-async-generators"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "packageManager": "npm@10.9.8",
    "runtime": "node@22.23.2"
  }
}

src/index.mjs

import rawPlugin from "@babel/plugin-syntax-async-generators";

export const pluginSyntaxAsyncGenerators =
  typeof rawPlugin === "function" ? rawPlugin : rawPlugin.default || rawPlugin;

export function createPluginInstance(api = {}, options = {}) {
  const normalizedApi = {
    assertVersion: (range) => {
      if (typeof api.assertVersion === "function") {
        api.assertVersion(range);
      }
    },
    ...api
  };
  return pluginSyntaxAsyncGenerators(normalizedApi, options);
}

export function applySyntaxPlugin(pluginInstance, parserOpts = {}) {
  if (!pluginInstance || typeof pluginInstance.manipulateOptions !== "function") {
    throw new Error("Invalid plugin instance: missing manipulateOptions");
  }
  if (!parserOpts.plugins) {
    parserOpts.plugins = [];
  }
  pluginInstance.manipulateOptions({}, parserOpts);
  return parserOpts;
}

export function configureParserOptions(parserOpts = {}, options = {}, api = {}) {
  const instance = createPluginInstance(api, options);
  return applySyntaxPlugin(instance, parserOpts);
}

export function hasAsyncGeneratorsSyntax(parserOpts = {}) {
  return Array.isArray(parserOpts.plugins) && parserOpts.plugins.includes("asyncGenerators");
}

test/contract.mjs

import assert from "node:assert/strict";
import rawPluginModule from "@babel/plugin-syntax-async-generators";
import {
  pluginSyntaxAsyncGenerators,
  createPluginInstance,
  applySyntaxPlugin,
  configureParserOptions,
  hasAsyncGeneratorsSyntax
} from "../src/index.mjs";

const rawPlugin =
  typeof rawPluginModule === "function"
    ? rawPluginModule
    : rawPluginModule.default || rawPluginModule;

// Contract 1: plugin exports a default plugin factory asserting Babel 7 compatibility
{
  assert.equal(typeof pluginSyntaxAsyncGenerators, "function");
  assert.equal(typeof rawPlugin, "function");

  let assertedVersion = null;
  const api = {
    assertVersion: (v) => {
      assertedVersion = v;
    }
  };
  const instance = rawPlugin(api, {});
  assert.equal(assertedVersion, 7);
  assert.ok(instance);

  const failingApi = {
    assertVersion: (v) => {
      if (v !== 7) throw new Error(`Unsupported version: ${v}`);
      throw new Error("Simulated version mismatch");
    }
  };
  assert.throws(() => rawPlugin(failingApi, {}), /Simulated version mismatch/);
}

// Contract 2: plugin factory returns plugin descriptor with name syntax-async-generators
{
  const api = {
    assertVersion: () => {}
  };
  const instance = createPluginInstance(api, {});
  assert.equal(typeof instance, "object");
  assert.equal(instance.name, "syntax-async-generators");
  assert.equal(typeof instance.manipulateOptions, "function");
}

// Contract 3: manipulateOptions appends asyncGenerators to parser plugins list
{
  const instance = createPluginInstance({ assertVersion: () => {} });
  const parserOpts = { plugins: ["typescript"] };

  applySyntaxPlugin(instance, parserOpts);

  assert.deepEqual(parserOpts.plugins, ["typescript", "asyncGenerators"]);
}

// Contract 4: manipulateOptions preserves existing parser plugins when adding asyncGenerators
{
  const instance = createPluginInstance({ assertVersion: () => {} });
  const initialPlugins = ["jsx", "decorators-legacy", "dynamicImport"];
  const parserOpts = { plugins: [...initialPlugins] };

  applySyntaxPlugin(instance, parserOpts);

  assert.equal(parserOpts.plugins.length, 4);
  assert.deepEqual(parserOpts.plugins.slice(0, 3), initialPlugins);
  assert.equal(parserOpts.plugins[3], "asyncGenerators");
}

// Contract 5: configureParserOptions helper creates plugin instance and updates parserOpts
{
  const emptyParserOpts = {};
  const result = configureParserOptions(emptyParserOpts);

  assert.ok(Array.isArray(result.plugins));
  assert.ok(result.plugins.includes("asyncGenerators"));
  assert.equal(emptyParserOpts, result);
}

// Contract 6: hasAsyncGeneratorsSyntax accurately checks presence of asyncGenerators in parser options
{
  assert.equal(hasAsyncGeneratorsSyntax({}), false);
  assert.equal(hasAsyncGeneratorsSyntax({ plugins: ["jsx", "flow"] }), false);
  assert.equal(hasAsyncGeneratorsSyntax({ plugins: ["jsx", "asyncGenerators"] }), true);
}

console.log("All @babel/plugin-syntax-async-generators contract tests passed successfully.");

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