semver 7.8.5: compare versions with semver.cmp

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: compare versions with semver.cmp
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/semver@7.8.5
Demonstrate these symbols/APIs:
  - semver.cmp
Constraints:
  - executionContext: node
Required runtime conditions:
  - ecosystem: npm
  - language: javascript
  - moduleSystem: cjs
  - packageManager: npm@11.8.0
  - runtime: node@24.13.1

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:a5f3387091b5d72d82db09eaf78fa3662f488ce6e3670d0afdc2c5958ed8ec8f","constraints":{"executionContext":"node"},"contract":["cmp evaluates greater than and greater than or equal comparisons between semantic versions","cmp evaluates less than and less than or equal comparisons between semantic versions","cmp evaluates equality and inequality operators correctly","cmp evaluates strict string identity with triple equals operator","cmp evaluates prerelease version precedence correctly","cmp throws TypeError when an invalid comparison operator is provided"],"goal":"compare versions with semver.cmp","kind":"HOW","packages":["pkg:npm/semver@7.8.5"],"schemaVersion":1,"symbols":["semver.cmp"]},"contractCommand":["node","test/contract.js"],"environment":{"arch":"x64","ecosystem":"npm","executionContext":"node","language":"javascript","moduleSystem":"cjs","os":"windows","osVersionBucket":"11","packageManager":"npm","runtime":"node","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/semver@7.8.5"],"schemaVersion":1,"symbols":["semver.cmp"],"verifierAdapter":"node-typescript@1"}

const semver = require('semver');

module.exports = {
  cmp: semver.cmp
};

{
  "name": "sample",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample",
      "version": "1.0.0",
      "dependencies": {
        "semver": "7.8.5"
      }
    },
    "node_modules/semver": {
      "version": "7.8.5",
      "resolved": "https://registry.npmjs.org/semver/-/semver-7.8.5.tgz",
      "integrity": "sha512-Y7/KDsb8LjooZpwaqGyulO6DQlksgCncchHGk+sZIY4SBvUocMBEFH5Ur1fI4dV+Jvl0w6cjvucaIi40puRioA==",
      "license": "ISC",
      "bin": {
        "semver": "bin/semver.js"
      },
      "engines": {
        "node": ">=10"
      }
    }
  }
}

{
  "name": "sample",
  "version": "1.0.0",
  "private": true,
  "main": "index.js",
  "dependencies": {
    "semver": "7.8.5"
  }
}

{
  "schemaVersion": 1,
  "goal": "compare versions with semver.cmp",
  "kind": "HOW",
  "packages": [
    "pkg:npm/semver@7.8.5"
  ],
  "symbols": [
    "semver.cmp"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "packageManager": "npm@11.8.0",
    "runtime": "node@24.13.1"
  }
}

const assert = require('assert');
const { cmp } = require('../index.js');

// cmp evaluates greater than and greater than or equal comparisons between semantic versions
assert.strictEqual(cmp('1.5.0', '>', '1.2.0'), true);
assert.strictEqual(cmp('1.2.0', '>', '1.5.0'), false);
assert.strictEqual(cmp('1.5.0', '>=', '1.5.0'), true);
assert.strictEqual(cmp('1.5.0', '>=', '1.2.0'), true);

// cmp evaluates less than and less than or equal comparisons between semantic versions
assert.strictEqual(cmp('1.2.0', '<', '1.5.0'), true);
assert.strictEqual(cmp('1.5.0', '<', '1.2.0'), false);
assert.strictEqual(cmp('1.2.0', '<=', '1.2.0'), true);
assert.strictEqual(cmp('1.2.0', '<=', '1.5.0'), true);

// cmp evaluates equality and inequality operators correctly
assert.strictEqual(cmp('1.2.3', '==', 'v1.2.3'), true);
assert.strictEqual(cmp('1.2.3', '=', '1.2.3'), true);
assert.strictEqual(cmp('1.2.3', '!=', '1.2.4'), true);
assert.strictEqual(cmp('1.2.3', '!=', '1.2.3'), false);
assert.strictEqual(cmp('1.2.3', '==', '1.2.3+build123'), true);

// cmp evaluates strict string identity with triple equals operator
assert.strictEqual(cmp('1.2.3', '===', '1.2.3'), true);
assert.strictEqual(cmp('1.2.3', '===', 'v1.2.3'), false);
assert.strictEqual(cmp('1.2.3', '!==', 'v1.2.3'), true);

// cmp evaluates prerelease version precedence correctly
assert.strictEqual(cmp('1.0.0-alpha', '<', '1.0.0'), true);
assert.strictEqual(cmp('1.0.0-beta', '>', '1.0.0-alpha'), true);
assert.strictEqual(cmp('1.0.0-alpha.1', '<', '1.0.0-alpha.2'), true);

// cmp throws TypeError when an invalid comparison operator is provided
assert.throws(() => {
  cmp('1.0.0', 'invalid', '1.0.0');
}, TypeError);

console.log('PASS: semver.cmp contract verified');