Ejemplo

@babel/plugin-syntax-class-static-block 7.14.5: verify class static block syntax parsing in babel

Muestra verificada para npm @babel/plugin-syntax-class-static-block 7.14.5: verify class static block syntax parsing in babel. El contrato se ejecutó en node…

sha256:079aced7042e9a731393de47b43a639ff8282952f1f816305c0b783c47b9b292

MIT-0

Evidencia de ejecución

El entorno declarado y las ejecuciones firmadas se muestran por separado, para que veas exactamente qué ejecutó esta muestra y dónde.

Base de evidencia: Contrato firmado aprobado
Recibos de verificación: 1
Claves de firma que lo compilaron: 1

Entorno declarado linux 24 · ubuntu · glibc 2.39 x64 npm

Entornos de las ejecuciones de verificación

Entorno	Contrato	Etapas	Ejecución
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: verify class static block syntax parsing in babel
Paquetes: @babel/plugin-syntax-class-static-block 7.14.5
Símbolos: @babel/plugin-syntax-class-static-block
Creado: 2026-08-26T14:14:34Z

Contrato

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

Archivos

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

Descargar el artefacto de código fuente (tar.gz)

Código fuente

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 class static block syntax parsing in babel
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40babel/plugin-syntax-class-static-block@7.14.5
Demonstrate these symbols/APIs:
  - @babel/plugin-syntax-class-static-block

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:sha256:5d1e182523f2cc74d995002304cc8751c11f7ea4cf593ddc02e69eb40bf85a24","contract":["plugin exports a default plugin factory asserting Babel 7 compatibility","plugin factory returns plugin descriptor with name syntax-class-static-block","manipulateOptions appends classStaticBlock to parser plugins list","manipulateOptions preserves existing parser plugins when adding classStaticBlock","configureParserOptions helper creates plugin instance and updates parserOpts","hasStaticBlockSyntax accurately checks presence of classStaticBlock in parser options"],"goal":"verify class static block syntax parsing in babel","kind":"HOW","packages":["pkg:npm/%40babel/plugin-syntax-class-static-block@7.14.5"],"schemaVersion":1,"symbols":["@babel/plugin-syntax-class-static-block"]},"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-syntax-class-static-block@7.14.5"],"schemaVersion":1,"subject":"pkg:npm/%40babel/plugin-syntax-class-static-block@7.14.5","symbols":["@babel/plugin-syntax-class-static-block"],"verifierAdapter":"node-typescript@1"}

package-lock.json

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package.json

{
  "name": "sample-babel-plugin-syntax-class-static-block",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "license": "MIT-0",
  "dependencies": {
    "@babel/plugin-syntax-class-static-block": "7.14.5"
  }
}

spec.json

{
  "schemaVersion": 1,
  "goal": "verify class static block syntax parsing in babel",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40babel/plugin-syntax-class-static-block@7.14.5"
  ],
  "symbols": [
    "@babel/plugin-syntax-class-static-block"
  ]
}

src/index.mjs

import rawPlugin from "@babel/plugin-syntax-class-static-block";

export const pluginSyntaxClassStaticBlock =
  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 pluginSyntaxClassStaticBlock(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 hasStaticBlockSyntax(parserOpts = {}) {
  return Array.isArray(parserOpts.plugins) && parserOpts.plugins.includes("classStaticBlock");
}

test/contract.mjs

import assert from "node:assert/strict";
import rawPluginModule from "@babel/plugin-syntax-class-static-block";
import {
  pluginSyntaxClassStaticBlock,
  createPluginInstance,
  applySyntaxPlugin,
  configureParserOptions,
  hasStaticBlockSyntax
} 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 pluginSyntaxClassStaticBlock, "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-class-static-block
{
  const api = {
    assertVersion: () => {}
  };
  const instance = createPluginInstance(api, {});
  assert.equal(typeof instance, "object");
  assert.equal(instance.name, "syntax-class-static-block");
  assert.equal(typeof instance.manipulateOptions, "function");
}

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

  applySyntaxPlugin(instance, parserOpts);

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

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

// 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("classStaticBlock"));
  assert.equal(emptyParserOpts, result);
}

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

console.log("All @babel/plugin-syntax-class-static-block contract tests passed successfully.");

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