semver 6.3.1: coerce

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 semver.coerce in pkg:npm/semver@6.3.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/semver@6.3.1
Demonstrate these symbols/APIs:
  - semver.coerce

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:sha256:27f5d91a6975ffb44abb1d639b952bbd2c2d5c204d1790e29ae548851bac9a1e","contract":["semver.coerce coerces partial version strings (major only or major.minor) into complete SemVer objects with zero-padded minor and patch","semver.coerce returns a SemVer instance whose version property contains normalized semantic version","semver.coerce converts numeric arguments to string and coerces into SemVer objects","semver.coerce extracts semantic version from strings containing leading prefixes, surrounding text, or extra version segments in left-to-right order by default","semver.coerce with rtl option enabled extracts the right-most coercible version segment from string","semver.coerce returns existing SemVer instance unchanged without re-parsing","semver.coerce returns null for non-coercible strings without version numbers or empty strings","semver.coerce returns null for non-string non-number non-SemVer inputs without throwing errors"],"goal":"verify semver.coerce in pkg:npm/semver@6.3.1","kind":"HOW","packages":["pkg:npm/semver@6.3.1"],"schemaVersion":1,"symbols":["semver.coerce"]},"contractCommand":["node","test/contract.mjs"],"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/semver@6.3.1"],"schemaVersion":1,"subject":"pkg:npm/semver@6.3.1","symbols":["semver.coerce"],"verifierAdapter":"node-typescript@1"}

import semver from 'semver';

/**
 * Coerces a target input into a semver string or null.
 * @param {string|number|import('semver').SemVer} target
 * @param {import('semver').CoerceOptions} [options]
 * @returns {string|null}
 */
export function coerceVersionString(target, options) {
  const result = semver.coerce(target, options);
  return result ? result.version : null;
}

/**
 * Coerces a target input into a SemVer object or null.
 * @param {string|number|import('semver').SemVer} target
 * @param {import('semver').CoerceOptions} [options]
 * @returns {import('semver').SemVer|null}
 */
export function coerceSemVer(target, options) {
  return semver.coerce(target, options);
}

export { semver };
export default semver;

{
  "name": "sample-semver-coerce",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-semver-coerce",
      "version": "1.0.0",
      "license": "MIT-0",
      "dependencies": {
        "semver": "6.3.1"
      }
    },
    "node_modules/semver": {
      "version": "6.3.1",
      "resolved": "https://registry.npmjs.org/semver/-/semver-6.3.1.tgz",
      "integrity": "sha512-BR7VvDCVHO+q2xBEWskxS6DJE1qRnb7DxzUrogb71CWoSficBxYsiAGd+Kl0mmq/MprG9yArRkyrQxTO6XjMzA==",
      "license": "ISC",
      "bin": {
        "semver": "bin/semver.js"
      }
    }
  }
}

{
  "name": "sample-semver-coerce",
  "version": "1.0.0",
  "description": "Verify semver.coerce in pkg:npm/semver@6.3.1",
  "main": "index.mjs",
  "type": "module",
  "scripts": {
    "test": "node test/contract.mjs"
  },
  "dependencies": {
    "semver": "6.3.1"
  },
  "license": "MIT-0"
}

{
  "schemaVersion": 1,
  "goal": "verify semver.coerce in pkg:npm/semver@6.3.1",
  "kind": "HOW",
  "packages": [
    "pkg:npm/semver@6.3.1"
  ],
  "symbols": [
    "semver.coerce"
  ]
}

import assert from 'node:assert/strict';
import semver from 'semver';
import { coerceVersionString, coerceSemVer } from '../index.mjs';

// 1. semver.coerce coerces partial version strings (major only or major.minor) into complete SemVer objects with zero-padded minor and patch
{
  const v1 = semver.coerce('1');
  assert.ok(v1 instanceof semver.SemVer);
  assert.equal(v1.version, '1.0.0');
  assert.equal(v1.major, 1);
  assert.equal(v1.minor, 0);
  assert.equal(v1.patch, 0);

  const v2 = semver.coerce('1.2');
  assert.ok(v2 instanceof semver.SemVer);
  assert.equal(v2.version, '1.2.0');
  assert.equal(v2.major, 1);
  assert.equal(v2.minor, 2);
  assert.equal(v2.patch, 0);

  assert.equal(coerceVersionString('1'), '1.0.0');
  assert.equal(coerceVersionString('1.2'), '1.2.0');
}

// 2. semver.coerce returns a SemVer instance whose version property contains normalized semantic version
{
  const res = semver.coerce('v2.4.6');
  assert.ok(res instanceof semver.SemVer);
  assert.equal(res.version, '2.4.6');
  assert.equal(res.major, 2);
  assert.equal(res.minor, 4);
  assert.equal(res.patch, 6);
  assert.equal(String(res), '2.4.6');
  assert.equal(coerceVersionString('v2.4.6'), '2.4.6');
  assert.ok(coerceSemVer('v2.4.6') instanceof semver.SemVer);
}

// 3. semver.coerce converts numeric arguments to string and coerces into SemVer objects
{
  const numCoerced = semver.coerce(42);
  assert.ok(numCoerced instanceof semver.SemVer);
  assert.equal(numCoerced.version, '42.0.0');
  assert.equal(numCoerced.major, 42);

  const zeroCoerced = semver.coerce(0);
  assert.ok(zeroCoerced instanceof semver.SemVer);
  assert.equal(zeroCoerced.version, '0.0.0');

  assert.equal(coerceVersionString(42), '42.0.0');
}

// 4. semver.coerce extracts semantic version from strings containing leading prefixes, surrounding text, or extra version segments in left-to-right order by default
{
  const textCoerced = semver.coerce('release-1.2.3.4-final');
  assert.ok(textCoerced instanceof semver.SemVer);
  assert.equal(textCoerced.version, '1.2.3');

  const multiCoerced = semver.coerce('prefix 1.0.0 suffix 2.0.0');
  assert.ok(multiCoerced instanceof semver.SemVer);
  assert.equal(multiCoerced.version, '1.0.0');

  assert.equal(coerceVersionString('release-1.2.3.4-final'), '1.2.3');
}

// 5. semver.coerce with rtl option enabled extracts the right-most coercible version segment from string
{
  const rtlExtra = semver.coerce('1.2.3.4', { rtl: true });
  assert.ok(rtlExtra instanceof semver.SemVer);
  assert.equal(rtlExtra.version, '2.3.4');

  const rtlMulti = semver.coerce('prefix 1.0.0 suffix 2.0.0', { rtl: true });
  assert.ok(rtlMulti instanceof semver.SemVer);
  assert.equal(rtlMulti.version, '2.0.0');

  assert.equal(coerceVersionString('1.2.3.4', { rtl: true }), '2.3.4');
}

// 6. semver.coerce returns existing SemVer instance unchanged without re-parsing
{
  const original = new semver.SemVer('3.2.1');
  const coerced = semver.coerce(original);
  assert.strictEqual(coerced, original);
  assert.strictEqual(coerceSemVer(original), original);
}

// 7. semver.coerce returns null for non-coercible strings without version numbers or empty strings
{
  assert.strictEqual(semver.coerce('no-version-here'), null);
  assert.strictEqual(semver.coerce(''), null);
  assert.strictEqual(coerceVersionString('no-version-here'), null);
  assert.strictEqual(coerceVersionString(''), null);
}

// 8. semver.coerce returns null for non-string non-number non-SemVer inputs without throwing errors
{
  assert.strictEqual(semver.coerce(null), null);
  assert.strictEqual(semver.coerce(undefined), null);
  assert.strictEqual(semver.coerce({}), null);
  assert.strictEqual(semver.coerce([]), null);
  assert.strictEqual(semver.coerce(true), null);
  assert.strictEqual(coerceVersionString(null), null);
}

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