toidentifier 1.0.1: toIdentifier

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 toIdentifier in pkg:npm/toidentifier@1.0.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/toidentifier@1.0.1
Demonstrate these symbols/APIs:
  - toIdentifier
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:c7ab9c6d28940d502becff186f079cdaea62e209a16de4f8a5002b71bc02ce14","constraints":{"executionContext":"node"},"contract":["toIdentifier converts space-separated words into PascalCase identifier strings","toIdentifier removes special characters while preserving alphanumeric characters and underscores","toIdentifier handles digits within tokens and words","toIdentifier preserves existing camelCase or PascalCase segments within tokens","toIdentifier returns an empty string when given an empty or whitespace-only string"],"goal":"verify toIdentifier in pkg:npm/toidentifier@1.0.1","kind":"HOW","packages":["pkg:npm/toidentifier@1.0.1"],"schemaVersion":1,"symbols":["toIdentifier"]},"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/toidentifier@1.0.1"],"schemaVersion":1,"subject":"pkg:npm/toidentifier@1.0.1","symbols":["toIdentifier"],"verifierAdapter":"node-typescript@1"}

{
  "name": "toidentifier-sample",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "toidentifier-sample",
      "version": "1.0.0",
      "dependencies": {
        "toidentifier": "1.0.1"
      }
    },
    "node_modules/toidentifier": {
      "version": "1.0.1",
      "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.1.tgz",
      "integrity": "sha512-o5sSPKEkg/DIQNmH43V0/uerLrpzVedkUh8tGNvaeXpfpuwjKenlSox/2O/BTlZUtEe+JG7s5YhEz608PlAHRA==",
      "license": "MIT",
      "engines": {
        "node": ">=0.6"
      }
    }
  }
}

{
  "name": "toidentifier-sample",
  "version": "1.0.0",
  "dependencies": {
    "toidentifier": "1.0.1"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify toIdentifier in pkg:npm/toidentifier@1.0.1",
  "kind": "HOW",
  "packages": [
    "pkg:npm/toidentifier@1.0.1"
  ],
  "symbols": [
    "toIdentifier"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "packageManager": "npm@10.9.8",
    "runtime": "node@22.23.2"
  }
}

const toIdentifier = require('toidentifier');

/**
 * Converts an arbitrary phrase or name into a valid JavaScript identifier.
 *
 * @param {string} input - The string to transform.
 * @returns {string} The transformed identifier in PascalCase.
 */
function toValidIdentifier(input) {
  return toIdentifier(input);
}

module.exports = {
  toIdentifier,
  toValidIdentifier,
};

const assert = require('node:assert/strict');
const { toIdentifier, toValidIdentifier } = require('../src/index.js');

function testSpaceSeparatedWords() {
  assert.strictEqual(toIdentifier('bad request'), 'BadRequest');
  assert.strictEqual(toIdentifier('not found'), 'NotFound');
  assert.strictEqual(toIdentifier('internal server error'), 'InternalServerError');
  assert.strictEqual(toValidIdentifier('hello world'), 'HelloWorld');
}

function testSpecialCharactersStripped() {
  assert.strictEqual(toIdentifier('hello-world'), 'Helloworld');
  assert.strictEqual(toIdentifier('foo.bar.baz'), 'Foobarbaz');
  assert.strictEqual(toIdentifier('user/profile/edit'), 'Userprofileedit');
  assert.strictEqual(toIdentifier('item @#$ %^& value!'), 'ItemValue');
  assert.strictEqual(toValidIdentifier('a+b=c'), 'Abc');
}

function testPreserveUnderscoresAndAlphanumeric() {
  assert.strictEqual(toIdentifier('user_name'), 'User_name');
  assert.strictEqual(toIdentifier('snake_case_name'), 'Snake_case_name');
  assert.strictEqual(toIdentifier('foo_123_bar'), 'Foo_123_bar');
}

function testDigitsAndMixedCasing() {
  assert.strictEqual(toIdentifier('HTTP 404 not found'), 'HTTP404NotFound');
  assert.strictEqual(toIdentifier('version 2 update 3'), 'Version2Update3');
  assert.strictEqual(toIdentifier('AlreadyCamelCased word'), 'AlreadyCamelCasedWord');
}

function testEmptyAndWhitespaceOnly() {
  assert.strictEqual(toIdentifier(''), '');
  assert.strictEqual(toIdentifier('   '), '');
  assert.strictEqual(toIdentifier('   padded input   '), 'PaddedInput');
  assert.strictEqual(toValidIdentifier(''), '');
}

function main() {
  testSpaceSeparatedWords();
  testSpecialCharactersStripped();
  testPreserveUnderscoresAndAlphanumeric();
  testDigitsAndMixedCasing();
  testEmptyAndWhitespaceOnly();
  console.log('All toIdentifier contract assertions passed.');
}

main();