cookie 0.7.2

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 pkg:npm/cookie@0.7.2
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/cookie@0.7.2

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:aca8fd228822aa2b39a42c41ac4922d7fa2077e315cc68c20b86e92047a0f92a","contract":["cookie.parse parses basic key-value pairs separated by semicolons","cookie.parse unquotes double-quoted values and decodes URI components","cookie.parse ignores duplicate keys by keeping the first occurrence and ignores whitespace around delimiters","cookie.parse returns an empty object for empty or single-character strings and throws TypeError for non-string input","cookie.serialize formats name and value into cookie string and encodes value using encodeURIComponent","cookie.serialize supports maxAge, domain, path, and expires options","cookie.serialize supports httpOnly, secure, and partitioned flags","cookie.serialize supports priority and sameSite options (lax, strict, none)","cookie.serialize throws TypeError on invalid name, invalid characters, or invalid option types"],"goal":"verify pkg:npm/cookie@0.7.2","kind":"HOW","packages":["pkg:npm/cookie@0.7.2"],"schemaVersion":1},"contractCommand":["node","test/contract.cjs"],"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/cookie@0.7.2"],"schemaVersion":1,"verifierAdapter":"node-typescript@1"}

{
  "name": "cookie-verification",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "cookie-verification",
      "version": "1.0.0",
      "dependencies": {
        "cookie": "0.7.2"
      }
    },
    "node_modules/cookie": {
      "version": "0.7.2",
      "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.7.2.tgz",
      "integrity": "sha512-yki5XnKuf750l50uGTllt6kKILY4nQ1eNIQatoXEByZ5dWgnKqbnqmTrBE5B4N7lrMJKQ2ytWMiTO2o0v6Ew/w==",
      "license": "MIT",
      "engines": {
        "node": ">= 0.6"
      }
    }
  }
}

{
  "name": "cookie-verification",
  "version": "1.0.0",
  "private": true,
  "description": "Clean-room verification for cookie",
  "dependencies": {
    "cookie": "0.7.2"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/cookie@0.7.2",
  "kind": "HOW",
  "packages": [
    "pkg:npm/cookie@0.7.2"
  ]
}

const assert = require('node:assert');
const cookie = require('cookie');

// 1. cookie.parse parses basic key-value pairs separated by semicolons
const parsed1 = cookie.parse('foo=bar; equation=E%3Dmc%5E2');
assert.strictEqual(parsed1.foo, 'bar');
assert.strictEqual(parsed1.equation, 'E=mc^2');

// 2. cookie.parse unquotes double-quoted values and decodes URI components
const parsed2 = cookie.parse('quote="hello world"; special="%20%21"');
assert.strictEqual(parsed2.quote, 'hello world');
assert.strictEqual(parsed2.special, ' !');

// 3. cookie.parse ignores duplicate keys by keeping the first occurrence and ignores whitespace around delimiters
const parsed3 = cookie.parse('  foo=first  ;  foo=second ; bar=baz  ');
assert.strictEqual(parsed3.foo, 'first');
assert.strictEqual(parsed3.bar, 'baz');

// 4. cookie.parse returns an empty object for empty or single-character strings and throws TypeError for non-string input
assert.deepStrictEqual(cookie.parse(''), {});
assert.deepStrictEqual(cookie.parse('a'), {});
assert.throws(() => cookie.parse(null), TypeError);
assert.throws(() => cookie.parse(123), TypeError);

// 5. cookie.serialize formats name and value into cookie string and encodes value using encodeURIComponent
assert.strictEqual(cookie.serialize('foo', 'bar'), 'foo=bar');
assert.strictEqual(cookie.serialize('foo', 'bar baz'), 'foo=bar%20baz');

// 6. cookie.serialize supports maxAge, domain, path, and expires options
const expiresDate = new Date('2030-01-01T00:00:00.000Z');
const serializedWithOptions = cookie.serialize('session', 'abc123', {
  maxAge: 3600,
  domain: 'example.com',
  path: '/api',
  expires: expiresDate
});
assert.strictEqual(
  serializedWithOptions,
  'session=abc123; Max-Age=3600; Domain=example.com; Path=/api; Expires=Tue, 01 Jan 2030 00:00:00 GMT'
);

// 7. cookie.serialize supports httpOnly, secure, and partitioned flags
const serializedFlags = cookie.serialize('token', 'xyz', {
  httpOnly: true,
  secure: true,
  partitioned: true
});
assert.strictEqual(serializedFlags, 'token=xyz; HttpOnly; Secure; Partitioned');

// 8. cookie.serialize supports priority and sameSite options (lax, strict, none)
assert.strictEqual(
  cookie.serialize('user', '1', { sameSite: 'lax', priority: 'low' }),
  'user=1; Priority=Low; SameSite=Lax'
);
assert.strictEqual(
  cookie.serialize('user', '1', { sameSite: 'strict', priority: 'medium' }),
  'user=1; Priority=Medium; SameSite=Strict'
);
assert.strictEqual(
  cookie.serialize('user', '1', { sameSite: 'none', priority: 'high' }),
  'user=1; Priority=High; SameSite=None'
);
assert.strictEqual(
  cookie.serialize('user', '1', { sameSite: true }),
  'user=1; SameSite=Strict'
);

// 9. cookie.serialize throws TypeError on invalid name, invalid characters, or invalid option types
assert.throws(() => cookie.serialize('foo\nbar', 'baz'), TypeError);
assert.throws(() => cookie.serialize('foo;bar', 'baz'), TypeError);
assert.throws(() => cookie.serialize('foo', 'bar', { sameSite: 'invalid' }), TypeError);
assert.throws(() => cookie.serialize('foo', 'bar', { priority: 'invalid' }), TypeError);
assert.throws(() => cookie.serialize('foo', 'bar', { maxAge: 'not-a-number' }), TypeError);

console.log('Contract passed');