@babel/types 7.29.8: booleanLiteral

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/types.booleanLiteral in pkg:npm/%40babel/types@7.29.8
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40babel/types@7.29.8
Demonstrate these symbols/APIs:
  - @babel/types.booleanLiteral
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.

{"case":{"caseId":"case:sha256:6ca38a4182839a6d9175030cfd463d737c18c5bd240da1e8cb64debd14893a81","constraints":{"executionContext":"node"},"contract":["booleanLiteral creates a BooleanLiteral AST node with the given boolean value","isBooleanLiteral returns true for BooleanLiteral nodes and false for other AST node types","isBooleanLiteral validates matching property values when specified in opts","assertBooleanLiteral asserts that an AST node is a BooleanLiteral and throws on mismatch"],"goal":"verify @babel/types.booleanLiteral in pkg:npm/%40babel/types@7.29.8","kind":"HOW","packages":["pkg:npm/%40babel/types@7.29.8"],"schemaVersion":1,"symbols":["@babel/types.booleanLiteral"]},"contractCommand":["node","test/contract.mjs"],"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/types@7.29.8"],"schemaVersion":1,"subject":"pkg:npm/%40babel/types@7.29.8","symbols":["@babel/types.booleanLiteral"],"verifierAdapter":"node-typescript@1"}

{
  "name": "sample-babel-types-boolean-literal",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-babel-types-boolean-literal",
      "version": "1.0.0",
      "license": "MIT-0",
      "dependencies": {
        "@babel/types": "7.29.8"
      }
    },
    "node_modules/@babel/helper-string-parser": {
      "version": "7.29.7",
      "resolved": "https://registry.npmjs.org/@babel/helper-string-parser/-/helper-string-parser-7.29.7.tgz",
      "integrity": "sha512-Pb5ijPrZ89GDH8223L4UP8i6QApWxs04RbPQJTeWDV0/keR2E36MeKnyr6LYmUUvqRRI+Iv87SuF1W6ErINzYw==",
      "license": "MIT",
      "engines": {
        "node": ">=6.9.0"
      }
    },
    "node_modules/@babel/helper-validator-identifier": {
      "version": "7.29.7",
      "resolved": "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.29.7.tgz",
      "integrity": "sha512-qehxGkRj55h/ff8EMaJ+cYhyaKlHIxqYDn682wQD7RNp9UujOQsHog2uS0r2vzr4pW+sXf90NeeayjcNaX3fFg==",
      "license": "MIT",
      "engines": {
        "node": ">=6.9.0"
      }
    },
    "node_modules/@babel/types": {
      "version": "7.29.8",
      "resolved": "https://registry.npmjs.org/@babel/types/-/types-7.29.8.tgz",
      "integrity": "sha512-Vj1jF3cPfxg7OAfoI7QnVKLoILlm2JF9pnVHrX8qx7AHMiYWT+NDAA7jChlNgRS4WTLc/fD1lXLmPixluj+3Gg==",
      "license": "MIT",
      "dependencies": {
        "@babel/helper-string-parser": "^7.29.7",
        "@babel/helper-validator-identifier": "^7.29.7"
      },
      "engines": {
        "node": ">=6.9.0"
      }
    }
  }
}

{
  "name": "sample-babel-types-boolean-literal",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "license": "MIT-0",
  "dependencies": {
    "@babel/types": "7.29.8"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify @babel/types.booleanLiteral in pkg:npm/%40babel/types@7.29.8",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40babel/types@7.29.8"
  ],
  "symbols": [
    "@babel/types.booleanLiteral"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "packageManager": "npm@10.9.8",
    "runtime": "node@22.23.2"
  }
}

import * as t from "@babel/types";

export function createTrueLiteral() {
  return t.booleanLiteral(true);
}

export function createFalseLiteral() {
  return t.booleanLiteral(false);
}

export function createBooleanLiteral(value) {
  return t.booleanLiteral(value);
}

export function checkIsBooleanLiteral(node, opts) {
  return t.isBooleanLiteral(node, opts);
}

export function validateBooleanLiteral(node, opts) {
  t.assertBooleanLiteral(node, opts);
}

import assert from "node:assert/strict";
import * as t from "@babel/types";
import {
  createTrueLiteral,
  createFalseLiteral,
  createBooleanLiteral,
  checkIsBooleanLiteral,
  validateBooleanLiteral
} from "../src/index.mjs";

// Test 1: booleanLiteral creates a BooleanLiteral AST node with true or false value
{
  const trueNode = createTrueLiteral();
  assert.equal(trueNode.type, "BooleanLiteral");
  assert.equal(trueNode.value, true);

  const falseNode = createFalseLiteral();
  assert.equal(falseNode.type, "BooleanLiteral");
  assert.equal(falseNode.value, false);

  const dynamicTrue = createBooleanLiteral(Boolean(1));
  assert.equal(dynamicTrue.type, "BooleanLiteral");
  assert.equal(dynamicTrue.value, true);
}

// Test 2: isBooleanLiteral returns true for BooleanLiteral nodes and false for other AST nodes
{
  const boolNode = createTrueLiteral();
  const numNode = t.numericLiteral(123);
  const strNode = t.stringLiteral("hello");
  const nullNode = t.nullLiteral();

  assert.equal(checkIsBooleanLiteral(boolNode), true);
  assert.equal(checkIsBooleanLiteral(numNode), false);
  assert.equal(checkIsBooleanLiteral(strNode), false);
  assert.equal(checkIsBooleanLiteral(nullNode), false);
  assert.equal(checkIsBooleanLiteral(null), false);
  assert.equal(checkIsBooleanLiteral(undefined), false);
}

// Test 3: isBooleanLiteral validates matching property values when specified in opts
{
  const trueNode = createTrueLiteral();
  const falseNode = createFalseLiteral();

  assert.equal(checkIsBooleanLiteral(trueNode, { value: true }), true);
  assert.equal(checkIsBooleanLiteral(trueNode, { value: false }), false);
  assert.equal(checkIsBooleanLiteral(falseNode, { value: false }), true);
  assert.equal(checkIsBooleanLiteral(falseNode, { value: true }), false);
}

// Test 4: assertBooleanLiteral succeeds for BooleanLiteral nodes and throws for other node types or mismatches
{
  const boolNode = createTrueLiteral();
  const strNode = t.stringLiteral("test");

  assert.doesNotThrow(() => {
    validateBooleanLiteral(boolNode);
  });

  assert.doesNotThrow(() => {
    validateBooleanLiteral(boolNode, { value: true });
  });

  assert.throws(() => {
    validateBooleanLiteral(strNode);
  });

  assert.throws(() => {
    validateBooleanLiteral(boolNode, { value: false });
  });
}

console.log("All @babel/types.booleanLiteral contract tests passed successfully.");