CodeSampleX

Exemplo

@babel/plugin-transform-destructuring 8.0.1

Amostra verificada para npm @babel/plugin-transform-destructuring 8.0.1. O contrato rodou em node 22 · linux alpine/x64 · docker e passou.

sha256:417d4c01f41b8415c1f8c3cd3accf2404f4f38282758833f3ebcd2be719d7fbe

Esta rede oferece uma coisa: uma amostra que compila. Ela a executou em um sandbox e guardou o recibo assinado. Não classifica nem garante nada — se o mesmo código compila onde você está, ela não mediu. Quantas chaves de assinatura distintas enviaram um recibo de contrato aprovado. Uma é só o autor; mais de uma significa que outra pessoa também o compilou. Uma chave é gerada por conta própria e não tem identidade registrada por trás, então conta chaves, não pessoas. 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@1		 2026-08-20

Caso

HOW
Objetivo
verify pkg:npm/%40babel/plugin-transform-destructuring@8.0.1
Pacotes
Ambiente
node 22.23.2
Criado
2026-08-20T17:43:19Z

Contrato

  1. assert @babel/plugin-transform-destructuring exports a plugin factory function and AST helper methods
  2. assert array destructuring transforms indexed assignments, default values, hole skips, and rest elements
  3. assert object destructuring transforms property extraction, identifier renaming, default values, and rest properties
  4. assert nested destructuring patterns correctly unpack combined object and array structures
  5. assert destructuring in assignment expressions transforms existing variable targets
  6. assert function parameter destructuring correctly handles default parameter objects and unpacked arguments
  7. assert destructuring transformations support iterableIsArray and objectRestNoSymbols compiler assumptions

Arquivos

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

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: verify pkg:npm/%40babel/plugin-transform-destructuring@8.0.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40babel/plugin-transform-destructuring@8.0.1
Constraints:
  - executionContext: node
Required runtime conditions:
  - ecosystem: npm
  - language: javascript
  - moduleSystem: cjs
  - 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:sha256:285281ee34be392080eb9588c21ea2a09c14a1c6506945756369a902fb0e748f","constraints":{"executionContext":"node"},"contract":["assert @babel/plugin-transform-destructuring exports a plugin factory function and AST helper methods","assert array destructuring transforms indexed assignments, default values, hole skips, and rest elements","assert object destructuring transforms property extraction, identifier renaming, default values, and rest properties","assert nested destructuring patterns correctly unpack combined object and array structures","assert destructuring in assignment expressions transforms existing variable targets","assert function parameter destructuring correctly handles default parameter objects and unpacked arguments","assert destructuring transformations support iterableIsArray and objectRestNoSymbols compiler assumptions"],"goal":"verify pkg:npm/%40babel/plugin-transform-destructuring@8.0.1","kind":"HOW","packages":["pkg:npm/%40babel/plugin-transform-destructuring@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-destructuring@8.0.1"],"schemaVersion":1,"subject":"pkg:npm/%40babel/plugin-transform-destructuring@8.0.1","verifierAdapter":"node-typescript@1"}
package-lock.json
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package.json
{
  "name": "sample-babel-plugin-transform-destructuring",
  "version": "1.0.0",
  "private": true,
  "description": "Clean-room verification sample for @babel/plugin-transform-destructuring",
  "main": "src/index.js",
  "scripts": {
    "test": "node test/contract.js"
  },
  "dependencies": {
    "@babel/plugin-transform-destructuring": "8.0.1"
  },
  "license": "MIT-0"
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/%40babel/plugin-transform-destructuring@8.0.1",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40babel/plugin-transform-destructuring@8.0.1"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "runtime": "node@22.23.2"
  }
}
src/index.js
'use strict';

const transformDestructuring = require('@babel/plugin-transform-destructuring');
const babel = require('@babel/core');

/**
 * Transforms JavaScript code using the destructuring transform plugin.
 *
 * @param {string} sourceCode - The input JavaScript source code.
 * @param {object} [options] - Options passed to the destructuring plugin.
 * @param {object} [assumptions] - Babel compiler assumptions.
 * @returns {string} The transformed JavaScript code.
 */
function transformDestructureCode(sourceCode, options = {}, assumptions = {}) {
  const result = babel.transformSync(sourceCode, {
    plugins: [[transformDestructuring, options]],
    assumptions,
    configFile: false,
    babelrc: false,
  });
  return result ? result.code : '';
}

/**
 * Transforms and executes JavaScript code to evaluate destructuring results.
 *
 * @param {string} sourceCode - JavaScript snippet that assigns results to variable `output`.
 * @param {object} [options] - Plugin options.
 * @param {object} [assumptions] - Compiler assumptions.
 * @returns {*} The evaluated output value.
 */
function evaluateDestructured(sourceCode, options = {}, assumptions = {}) {
  const transformed = transformDestructureCode(sourceCode, options, assumptions);
  let output;
  eval(transformed);
  return output;
}

module.exports = {
  transformDestructuring,
  transformDestructureCode,
  evaluateDestructured,
};
test/contract.js
'use strict';

const assert = require('node:assert/strict');
const transformDestructuring = require('@babel/plugin-transform-destructuring');
const {
  transformDestructureCode,
  evaluateDestructured,
} = require('../src/index.js');

// Contract 1: assert @babel/plugin-transform-destructuring exports a plugin factory function and AST helper methods
{
  assert.strictEqual(typeof transformDestructuring, 'object', 'Plugin module should be an object');
  assert.strictEqual(typeof transformDestructuring.default, 'function', 'Plugin default export should be a function');
  assert.strictEqual(typeof transformDestructuring.buildObjectExcludingKeys, 'function', 'buildObjectExcludingKeys should be a function');
  assert.strictEqual(typeof transformDestructuring.unshiftForXStatementBody, 'function', 'unshiftForXStatementBody should be a function');
}

// Contract 2: assert array destructuring transforms indexed assignments, default values, hole skips, and rest elements
{
  const code = `
    const [first, , third = 30, ...tail] = [10, 20, undefined, 40, 50];
    output = { first, third, tail };
  `;
  const result = evaluateDestructured(code);
  assert.deepStrictEqual(result, {
    first: 10,
    third: 30,
    tail: [40, 50],
  }, 'Array destructuring with defaults, holes, and rest elements should evaluate correctly');
}

// Contract 3: assert object destructuring transforms property extraction, identifier renaming, default values, and rest properties
{
  const code = `
    const { name: userName, role = "guest", ...metadata } = { name: "Alice", active: true, level: 5 };
    output = { userName, role, metadata };
  `;
  const result = evaluateDestructured(code);
  assert.deepStrictEqual(result, {
    userName: 'Alice',
    role: 'guest',
    metadata: { active: true, level: 5 },
  }, 'Object destructuring with rename, default, and rest should evaluate correctly');
}

// Contract 4: assert nested destructuring patterns correctly unpack combined object and array structures
{
  const code = `
    const { point: [x, y = 0], meta: { id, tag = "default-tag" } } = {
      point: [100],
      meta: { id: "item-1" }
    };
    output = { x, y, id, tag };
  `;
  const result = evaluateDestructured(code);
  assert.deepStrictEqual(result, {
    x: 100,
    y: 0,
    id: 'item-1',
    tag: 'default-tag',
  }, 'Nested object and array destructuring should evaluate correctly');
}

// Contract 5: assert destructuring in assignment expressions transforms existing variable targets
{
  const code = `
    let a, b, c;
    [a, b, c = 3] = [1, 2];
    let x, y;
    ({ x, y = 20 } = { x: 10 });
    output = { a, b, c, x, y };
  `;
  const result = evaluateDestructured(code);
  assert.deepStrictEqual(result, {
    a: 1,
    b: 2,
    c: 3,
    x: 10,
    y: 20,
  }, 'Assignment expression destructuring should update existing variables');
}

// Contract 6: assert function parameter destructuring correctly handles default parameter objects and unpacked arguments
{
  const code = `
    function describeHost({ host = "127.0.0.1", port = 8080 } = {}) {
      return host + ":" + port;
    }
    output = {
      defaultCall: describeHost(),
      customCall: describeHost({ host: "example.com", port: 443 })
    };
  `;
  const result = evaluateDestructured(code);
  assert.deepStrictEqual(result, {
    defaultCall: '127.0.0.1:8080',
    customCall: 'example.com:443',
  }, 'Function parameter destructuring should support default objects and custom inputs');
}

// Contract 7: assert destructuring transformations support iterableIsArray and objectRestNoSymbols compiler assumptions
{
  const code = `
    const [h, ...t] = [1, 2, 3];
    const { k, ...rest } = { k: "val", extra: 99 };
    output = { h, t, k, rest };
  `;
  const transformed = transformDestructureCode(code, {}, {
    iterableIsArray: true,
    objectRestNoSymbols: true,
  });
  assert.ok(transformed.includes('_objectWithoutPropertiesLoose'), 'Should use loose helper under objectRestNoSymbols assumption');
  const result = evaluateDestructured(code, {}, {
    iterableIsArray: true,
    objectRestNoSymbols: true,
  });
  assert.deepStrictEqual(result, {
    h: 1,
    t: [2, 3],
    k: 'val',
    rest: { extra: 99 },
  }, 'Destructuring under assumptions should evaluate correctly');
}

console.log('All @babel/plugin-transform-destructuring contract assertions passed.');

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