@types/http-cache-semantics 4.2.0

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/%40types/http-cache-semantics@4.2.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40types/http-cache-semantics@4.2.0

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:sha256:80b33c40fb877b66e801557e36abfedc8cc60be5ac741bd826578eb5d1ff234e","contract":["@types/http-cache-semantics package.json declares type definitions entry point index.d.ts and version 4.2.0","@types/http-cache-semantics index.d.ts exports CachePolicy class","@types/http-cache-semantics CachePolicy constructor accepts HttpRequest, HttpResponse, and Options","@types/http-cache-semantics CachePolicy declares methods storable, satisfiesWithoutRevalidation, responseHeaders, date, age, maxAge, timeToLive, stale, toObject, and revalidationHeaders","@types/http-cache-semantics CachePolicy static method fromObject creates CachePolicy instance","@types/http-cache-semantics namespace declares HttpRequest, HttpResponse, Options, CachePolicyObject, Headers, and RevalidationPolicy interfaces"],"goal":"verify pkg:npm/%40types/http-cache-semantics@4.2.0","kind":"HOW","packages":["pkg:npm/%40types/http-cache-semantics@4.2.0"],"schemaVersion":1},"contractCommand":["node","test/contract.mjs"],"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/%40types/http-cache-semantics@4.2.0"],"schemaVersion":1,"subject":"pkg:npm/%40types/http-cache-semantics@4.2.0","verifierAdapter":"node-typescript@1"}

{
  "name": "sample-types-http-cache-semantics",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-types-http-cache-semantics",
      "version": "1.0.0",
      "license": "MIT-0",
      "dependencies": {
        "@types/http-cache-semantics": "4.2.0"
      }
    },
    "node_modules/@types/http-cache-semantics": {
      "version": "4.2.0",
      "resolved": "https://registry.npmjs.org/@types/http-cache-semantics/-/http-cache-semantics-4.2.0.tgz",
      "integrity": "sha512-L3LgimLHXtGkWikKnsPg0/VFx9OGZaC+eN1u4r+OB1XRqH3meBIAVC2zr1WdMH+RHmnRkqliQAOHNJ/E0j/e0Q==",
      "license": "MIT"
    }
  }
}

{
  "name": "sample-types-http-cache-semantics",
  "version": "1.0.0",
  "type": "module",
  "private": true,
  "license": "MIT-0",
  "dependencies": {
    "@types/http-cache-semantics": "4.2.0"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/%40types/http-cache-semantics@4.2.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40types/http-cache-semantics@4.2.0"
  ]
}

import assert from 'node:assert/strict';
import fs from 'node:fs';
import { createRequire } from 'node:module';

const require = createRequire(import.meta.url);

// 1. @types/http-cache-semantics package.json declares type definitions entry point index.d.ts and version 4.2.0
const pkgJson = require('@types/http-cache-semantics/package.json');
assert.equal(pkgJson.name, '@types/http-cache-semantics');
assert.equal(pkgJson.version, '4.2.0');
assert.equal(pkgJson.types, 'index.d.ts');

// 2. @types/http-cache-semantics index.d.ts exports CachePolicy class
const dtsPath = require.resolve('@types/http-cache-semantics/index.d.ts');
assert.ok(fs.existsSync(dtsPath));
const dtsContent = fs.readFileSync(dtsPath, 'utf8');

assert.ok(dtsContent.includes('export = CachePolicy;'));
assert.ok(dtsContent.includes('declare class CachePolicy {'));

// 3. @types/http-cache-semantics CachePolicy constructor accepts HttpRequest, HttpResponse, and Options
assert.ok(dtsContent.includes('constructor(req: CachePolicy.HttpRequest, res: CachePolicy.HttpResponse, options?: CachePolicy.Options);'));

// 4. @types/http-cache-semantics CachePolicy declares methods storable, satisfiesWithoutRevalidation, responseHeaders, date, age, maxAge, timeToLive, stale, toObject, and revalidationHeaders
assert.ok(dtsContent.includes('storable(): boolean;'));
assert.ok(dtsContent.includes('satisfiesWithoutRevalidation(newRequest: CachePolicy.HttpRequest): boolean;'));
assert.ok(dtsContent.includes('evaluateRequest(newRequest: CachePolicy.HttpRequest): CachePolicy.EvaluateRequestResult;'));
assert.ok(dtsContent.includes('responseHeaders(): CachePolicy.Headers;'));
assert.ok(dtsContent.includes('date(): number;'));
assert.ok(dtsContent.includes('age(): number;'));
assert.ok(dtsContent.includes('maxAge(): number;'));
assert.ok(dtsContent.includes('timeToLive(): number;'));
assert.ok(dtsContent.includes('stale(): boolean;'));
assert.ok(dtsContent.includes('toObject(): CachePolicy.CachePolicyObject;'));
assert.ok(dtsContent.includes('revalidationHeaders(newRequest: CachePolicy.HttpRequest): CachePolicy.Headers;'));
assert.ok(dtsContent.includes('revalidatedPolicy('));

// 5. @types/http-cache-semantics CachePolicy static method fromObject creates CachePolicy instance
assert.ok(dtsContent.includes('static fromObject(obj: CachePolicy.CachePolicyObject): CachePolicy;'));

// 6. @types/http-cache-semantics namespace declares HttpRequest, HttpResponse, Options, CachePolicyObject, Headers, and RevalidationPolicy interfaces
assert.ok(dtsContent.includes('declare namespace CachePolicy {'));
assert.ok(dtsContent.includes('interface HttpRequest {'));
assert.ok(dtsContent.includes('interface HttpResponse {'));
assert.ok(dtsContent.includes('interface Options {'));
assert.ok(dtsContent.includes('interface CachePolicyObject {'));
assert.ok(dtsContent.includes('interface Headers {'));
assert.ok(dtsContent.includes('interface RevalidationPolicy {'));

console.log('All contract tests passed.');