CodeSampleX

Beispiel

@babel/plugin-transform-arrow-functions 7.29.7: default

Verifiziertes Beispiel für npm @babel/plugin-transform-arrow-functions 7.29.7: default. Der Vertrag lief auf node 22 · linux alpine/x64 · docker und bestand.

sha256:fe2e20269e968096b97ac513c4ee058c3c67601030fd83c693145ac350c5ce30

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 linux 24 · ubuntu · glibc 2.39 x64 npm

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…		 2026-08-23

Fall

HOW
Ziel
verify @babel/plugin-transform-arrow-functions.default in pkg:npm/%40babel/plugin-transform-arrow-functions@7.29.7
Pakete
Symbole
  • @babel/plugin-transform-arrow-functions.default
Erstellt
2026-08-23T08:01:59Z

Contract

  1. Plugin default export is a function factory asserting Babel 7 compatibility
  2. Plugin factory returns an object named transform-arrow-functions with an ArrowFunctionExpression visitor method
  3. ArrowFunctionExpression visitor invokes arrowFunctionToExpression with default loose options when spec option is omitted
  4. ArrowFunctionExpression visitor configures specCompliant transformation when spec option is true
  5. ArrowFunctionExpression visitor prioritizes noNewArrows compiler assumption over spec option
  6. ArrowFunctionExpression visitor skips transformation when node is not an arrow function expression
  7. Module helper simulateArrowTransformation successfully executes plugin lifecycle and collects transform configuration

Dateien

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

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 @babel/plugin-transform-arrow-functions.default in pkg:npm/%40babel/plugin-transform-arrow-functions@7.29.7
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40babel/plugin-transform-arrow-functions@7.29.7
Demonstrate these symbols/APIs:
  - @babel/plugin-transform-arrow-functions.default

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-transform-arrow-functions",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "license": "MIT-0",
  "dependencies": {
    "@babel/plugin-transform-arrow-functions": "7.29.7"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify @babel/plugin-transform-arrow-functions.default in pkg:npm/%40babel/plugin-transform-arrow-functions@7.29.7",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40babel/plugin-transform-arrow-functions@7.29.7"
  ],
  "symbols": [
    "@babel/plugin-transform-arrow-functions.default"
  ]
}
src/index.mjs
import arrowFunctionsPluginModule from "@babel/plugin-transform-arrow-functions";

export const arrowFunctionsPlugin =
  typeof arrowFunctionsPluginModule === "function"
    ? arrowFunctionsPluginModule
    : arrowFunctionsPluginModule.default || arrowFunctionsPluginModule;

export function instantiatePlugin(api = {}, options = {}) {
  const normalizedApi = {
    assertVersion: (range) => {
      if (typeof api.assertVersion === "function") {
        api.assertVersion(range);
      }
    },
    assumption: (name) => {
      if (typeof api.assumption === "function") {
        return api.assumption(name);
      }
      return undefined;
    },
    ...api
  };
  return arrowFunctionsPlugin(normalizedApi, options);
}

export function transformArrowNode(pluginInstance, path) {
  if (!pluginInstance?.visitor?.ArrowFunctionExpression) {
    throw new Error("Invalid plugin instance: missing ArrowFunctionExpression visitor");
  }
  return pluginInstance.visitor.ArrowFunctionExpression(path);
}

export function simulateArrowTransformation(options = {}, assumptions = {}, mockPath = null) {
  let transformedConfig = null;
  const path = mockPath || {
    _isArrow: true,
    isArrowFunctionExpression() {
      return this._isArrow;
    },
    arrowFunctionToExpression(opts) {
      transformedConfig = opts;
    }
  };

  const api = {
    assertVersion: (version) => {
      if (typeof version === "number" && version !== 7) {
        throw new Error(`Unsupported Babel version: ${version}`);
      }
    },
    assumption: (name) => assumptions[name]
  };

  const instance = instantiatePlugin(api, options);
  transformArrowNode(instance, path);
  return { instance, path, transformedConfig };
}
test/contract.mjs
import assert from "node:assert/strict";
import arrowFunctionsPluginModule from "@babel/plugin-transform-arrow-functions";
import {
  arrowFunctionsPlugin,
  instantiatePlugin,
  transformArrowNode,
  simulateArrowTransformation
} from "../src/index.mjs";

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

// Contract 1: Plugin default export is a function factory asserting Babel 7 compatibility
{
  assert.equal(typeof arrowFunctionsPlugin, "function");
  assert.equal(typeof rawPlugin, "function");

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

// Contract 2: Plugin factory returns an object named transform-arrow-functions with an ArrowFunctionExpression visitor method
{
  const api = {
    assertVersion: () => {},
    assumption: () => undefined
  };
  const pluginInstance = instantiatePlugin(api, {});
  assert.equal(pluginInstance.name, "transform-arrow-functions");
  assert.ok(pluginInstance.visitor);
  assert.equal(typeof pluginInstance.visitor.ArrowFunctionExpression, "function");
}

// Contract 3: ArrowFunctionExpression visitor invokes arrowFunctionToExpression with default loose options when spec option is omitted
{
  const api = {
    assertVersion: () => {},
    assumption: () => undefined
  };
  const pluginInstance = instantiatePlugin(api, {});
  let receivedOptions = null;
  const mockPath = {
    isArrowFunctionExpression: () => true,
    arrowFunctionToExpression: (opts) => {
      receivedOptions = opts;
    }
  };

  transformArrowNode(pluginInstance, mockPath);
  assert.deepEqual(receivedOptions, {
    allowInsertArrow: false,
    noNewArrows: true,
    specCompliant: false
  });
}

// Contract 4: ArrowFunctionExpression visitor configures specCompliant transformation when spec option is true
{
  const api = {
    assertVersion: () => {},
    assumption: () => undefined
  };
  const pluginInstance = instantiatePlugin(api, { spec: true });
  let receivedOptions = null;
  const mockPath = {
    isArrowFunctionExpression: () => true,
    arrowFunctionToExpression: (opts) => {
      receivedOptions = opts;
    }
  };

  transformArrowNode(pluginInstance, mockPath);
  assert.deepEqual(receivedOptions, {
    allowInsertArrow: false,
    noNewArrows: false,
    specCompliant: true
  });
}

// Contract 5: ArrowFunctionExpression visitor prioritizes noNewArrows compiler assumption over spec option
{
  // When assumption noNewArrows is true, it overrides spec: true
  {
    const apiWithAssumptionTrue = {
      assertVersion: () => {},
      assumption: (name) => (name === "noNewArrows" ? true : undefined)
    };
    const pluginInstance = instantiatePlugin(apiWithAssumptionTrue, { spec: true });
    let receivedOptions = null;
    const mockPath = {
      isArrowFunctionExpression: () => true,
      arrowFunctionToExpression: (opts) => {
        receivedOptions = opts;
      }
    };
    transformArrowNode(pluginInstance, mockPath);
    assert.deepEqual(receivedOptions, {
      allowInsertArrow: false,
      noNewArrows: true,
      specCompliant: false
    });
  }

  // When assumption noNewArrows is false, it overrides spec: false
  {
    const apiWithAssumptionFalse = {
      assertVersion: () => {},
      assumption: (name) => (name === "noNewArrows" ? false : undefined)
    };
    const pluginInstance = instantiatePlugin(apiWithAssumptionFalse, { spec: false });
    let receivedOptions = null;
    const mockPath = {
      isArrowFunctionExpression: () => true,
      arrowFunctionToExpression: (opts) => {
        receivedOptions = opts;
      }
    };
    transformArrowNode(pluginInstance, mockPath);
    assert.deepEqual(receivedOptions, {
      allowInsertArrow: false,
      noNewArrows: false,
      specCompliant: true
    });
  }
}

// Contract 6: ArrowFunctionExpression visitor skips transformation when node is not an arrow function expression
{
  const api = {
    assertVersion: () => {},
    assumption: () => undefined
  };
  const pluginInstance = instantiatePlugin(api, {});
  let called = false;
  const nonArrowPath = {
    isArrowFunctionExpression: () => false,
    arrowFunctionToExpression: () => {
      called = true;
    }
  };

  transformArrowNode(pluginInstance, nonArrowPath);
  assert.equal(called, false);
}

// Contract 7: Module helper simulateArrowTransformation successfully executes plugin lifecycle and collects transform configuration
{
  const { transformedConfig: defaultResult } = simulateArrowTransformation();
  assert.deepEqual(defaultResult, {
    allowInsertArrow: false,
    noNewArrows: true,
    specCompliant: false
  });

  const { transformedConfig: specResult } = simulateArrowTransformation({ spec: true });
  assert.deepEqual(specResult, {
    allowInsertArrow: false,
    noNewArrows: false,
    specCompliant: true
  });

  const { transformedConfig: assumptionResult } = simulateArrowTransformation(
    { spec: false },
    { noNewArrows: false }
  );
  assert.deepEqual(assumptionResult, {
    allowInsertArrow: false,
    noNewArrows: false,
    specCompliant: true
  });
}

console.log("All @babel/plugin-transform-arrow-functions contract tests passed successfully.");

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