@typescript-eslint/typescript-estree 8.66.0: parse

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 @typescript-eslint/typescript-estree.parse in pkg:npm/%40typescript-eslint/typescript-estree@8.66.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40typescript-eslint/typescript-estree@8.66.0
Demonstrate these symbols/APIs:
  - @typescript-eslint/typescript-estree.parse
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.

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{
  "name": "verify-typescript-estree-parse",
  "version": "1.0.0",
  "private": true,
  "description": "verify @typescript-eslint/typescript-estree.parse in pkg:npm/@typescript-eslint/typescript-estree@8.66.0",
  "main": "src/index.js",
  "scripts": {
    "test": "node test/contract.cjs"
  },
  "dependencies": {
    "@typescript-eslint/typescript-estree": "8.66.0"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify @typescript-eslint/typescript-estree.parse in pkg:npm/%40typescript-eslint/typescript-estree@8.66.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40typescript-eslint/typescript-estree@8.66.0"
  ],
  "symbols": [
    "@typescript-eslint/typescript-estree.parse"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
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    "language": "javascript",
    "moduleSystem": "cjs",
    "packageManager": "npm@10.9.8",
    "runtime": "node@22.23.2"
  }
}

const { parse } = require('@typescript-eslint/typescript-estree');

function parseCode(code, options = {}) {
  return parse(code, {
    loc: true,
    range: true,
    ...options,
  });
}

module.exports = {
  parseCode,
};

const assert = require('assert');
const { parse } = require('@typescript-eslint/typescript-estree');
const { parseCode } = require('../src/index.js');

// Test 1: parse variable declaration with type annotation
const tsVarCode = 'const count: number = 100;';
const varAst = parseCode(tsVarCode);

assert.strictEqual(varAst.type, 'Program');
assert.strictEqual(varAst.body.length, 1);

const varDecl = varAst.body[0];
assert.strictEqual(varDecl.type, 'VariableDeclaration');
assert.strictEqual(varDecl.kind, 'const');
assert.strictEqual(varDecl.declarations.length, 1);

const declarator = varDecl.declarations[0];
assert.strictEqual(declarator.id.name, 'count');
assert.strictEqual(declarator.id.typeAnnotation.typeAnnotation.type, 'TSNumberKeyword');
assert.strictEqual(declarator.init.value, 100);

// Test 2: parse function with typed parameters and return type
const tsFnCode = 'function greet(name: string): string { return "Hello, " + name; }';
const fnAst = parse(tsFnCode, { loc: true, range: true });

assert.strictEqual(fnAst.type, 'Program');
assert.strictEqual(fnAst.body.length, 1);

const fnDecl = fnAst.body[0];
assert.strictEqual(fnDecl.type, 'FunctionDeclaration');
assert.strictEqual(fnDecl.id.name, 'greet');
assert.strictEqual(fnDecl.params.length, 1);
assert.strictEqual(fnDecl.params[0].name, 'name');
assert.strictEqual(fnDecl.params[0].typeAnnotation.typeAnnotation.type, 'TSStringKeyword');
assert.strictEqual(fnDecl.returnType.typeAnnotation.type, 'TSStringKeyword');

// Test 3: AST node loc and range metadata
assert(varAst.loc !== undefined, 'loc should be present');
assert(varAst.range !== undefined, 'range should be present');
assert.strictEqual(varAst.range[0], 0);
assert.strictEqual(varAst.range[1], tsVarCode.length);

console.log('Contract verification passed successfully.');