ip-address 10.7.0: Address6.fromURL

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 Address6.fromURL in pkg:npm/ip-address@10.7.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/ip-address@10.7.0
Demonstrate these symbols/APIs:
  - Address6.fromURL

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:sha256:6f61a62c466e65c2694d26525b80103e281eb0b57b36899327c4043a2afd2914","contract":["Address6.fromURL parses bracketed IPv6 address and port from HTTP URL","Address6.fromURL parses bracketed IPv6 address without port and sets port to null","Address6.fromURL parses bracketed IPv6 address from URL with protocol and no port","Address6.fromURL parses host without protocol scheme as bracketed address and port","Address6.fromURL squelches out-of-range port numbers to null","Address6.fromURL returns error and null address and port for invalid non-IPv6 URLs","Address6.fromURL returns error and null address and port for malformed bracketed host with port"],"goal":"verify Address6.fromURL in pkg:npm/ip-address@10.7.0","kind":"HOW","packages":["pkg:npm/ip-address@10.7.0"],"schemaVersion":1,"symbols":["Address6.fromURL"]},"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/ip-address@10.7.0"],"schemaVersion":1,"subject":"pkg:npm/ip-address@10.7.0","symbols":["Address6.fromURL"],"verifierAdapter":"node-typescript@1"}

{
  "name": "ip-address-fromurl-sample",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "ip-address-fromurl-sample",
      "version": "1.0.0",
      "dependencies": {
        "ip-address": "10.7.0"
      }
    },
    "node_modules/ip-address": {
      "version": "10.7.0",
      "resolved": "https://registry.npmjs.org/ip-address/-/ip-address-10.7.0.tgz",
      "integrity": "sha512-BGFsyJd5mpXp3rK6jIdADLNgpJUK1jnjzvYF8lK+VyDab9JAmqN0YOKDdP17HlgKb2+ehPgDc8EtnRLbGCAMhA==",
      "license": "MIT",
      "engines": {
        "node": ">= 12"
      }
    }
  }
}

{
  "name": "ip-address-fromurl-sample",
  "version": "1.0.0",
  "private": true,
  "description": "Verification sample for Address6.fromURL in ip-address@10.7.0",
  "dependencies": {
    "ip-address": "10.7.0"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify Address6.fromURL in pkg:npm/ip-address@10.7.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/ip-address@10.7.0"
  ],
  "symbols": [
    "Address6.fromURL"
  ]
}

const assert = require('node:assert/strict');
const { Address6 } = require('ip-address');

// 1. Address6.fromURL parses bracketed IPv6 address and port from HTTP URL
const res1 = Address6.fromURL('http://[2001:db8::1]:8080/path?query=1#hash');
assert.equal(res1.error, undefined);
assert.equal(res1.port, 8080);
assert.equal(res1.address instanceof Address6, true);
assert.equal(res1.address.correctForm(), '2001:db8::1');

// 2. Address6.fromURL parses bracketed IPv6 address without port and sets port to null
const res2 = Address6.fromURL('https://[::1]/');
assert.equal(res2.error, undefined);
assert.equal(res2.port, null);
assert.equal(res2.address instanceof Address6, true);
assert.equal(res2.address.correctForm(), '::1');

// 3. Address6.fromURL parses bracketed IPv6 address from URL with protocol and no port
const res3 = Address6.fromURL('http://[2001:db8::1]/');
assert.equal(res3.error, undefined);
assert.equal(res3.port, null);
assert.equal(res3.address instanceof Address6, true);
assert.equal(res3.address.correctForm(), '2001:db8::1');

// 4. Address6.fromURL parses host without protocol scheme as bracketed address and port
const res4 = Address6.fromURL('[fe80::1]:443');
assert.equal(res4.error, undefined);
assert.equal(res4.port, 443);
assert.equal(res4.address instanceof Address6, true);
assert.equal(res4.address.correctForm(), 'fe80::1');

// 5. Address6.fromURL squelches out-of-range port numbers to null
const res5 = Address6.fromURL('http://[::1]:70000/');
assert.equal(res5.error, undefined);
assert.equal(res5.port, null);
assert.equal(res5.address instanceof Address6, true);
assert.equal(res5.address.correctForm(), '::1');

// 6. Address6.fromURL returns error and null address and port for invalid non-IPv6 URLs
const res6 = Address6.fromURL('http://example.com/foo');
assert.equal(res6.error, 'failed to parse address from URL');
assert.equal(res6.address, null);
assert.equal(res6.port, null);

// 7. Address6.fromURL returns error and null address and port for malformed bracketed host with port
const res7 = Address6.fromURL('http://[invalid:ipv6]:8080/');
assert.equal(res7.error, 'failed to parse address with port');
assert.equal(res7.address, null);
assert.equal(res7.port, null);

console.log('Contract verified successfully.');