baseline-browser-mapping 2.11.16: _resetHasWarned

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 baseline-browser-mapping._resetHasWarned in pkg:npm/baseline-browser-mapping@2.11.16
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/baseline-browser-mapping@2.11.16
Demonstrate these symbols/APIs:
  - baseline-browser-mapping._resetHasWarned

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:sha256:622cdb9f4934b7b75d9ffd33ee7e23bb48e55e7ddd8003efb0c9ec30bc7968d2","contract":["_resetHasWarned is exported as a callable function that returns undefined","_resetHasWarned resets internal warning state allowing stale data warning to fire again","_resetHasWarned can be safely called repeatedly without throwing"],"goal":"verify baseline-browser-mapping._resetHasWarned in pkg:npm/baseline-browser-mapping@2.11.16","kind":"HOW","packages":["pkg:npm/baseline-browser-mapping@2.11.16"],"schemaVersion":1,"symbols":["baseline-browser-mapping._resetHasWarned"]},"contractCommand":["node","test/contract.js"],"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/baseline-browser-mapping@2.11.16"],"schemaVersion":1,"subject":"pkg:npm/baseline-browser-mapping@2.11.16","symbols":["baseline-browser-mapping._resetHasWarned"],"verifierAdapter":"node-typescript@1"}

{
  "name": "baseline-browser-mapping-sample",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "baseline-browser-mapping-sample",
      "version": "1.0.0",
      "dependencies": {
        "baseline-browser-mapping": "2.11.16"
      }
    },
    "node_modules/baseline-browser-mapping": {
      "version": "2.11.16",
      "resolved": "https://registry.npmjs.org/baseline-browser-mapping/-/baseline-browser-mapping-2.11.16.tgz",
      "integrity": "sha512-H/bNPUFHewJHyCTdjn1n3Pit5+2GmWT6mmeHImPX+8MA9NA6b67jO4gYmi4jTbCJb2otq34KMZnovndDPqJwhQ==",
      "license": "Apache-2.0",
      "bin": {
        "baseline-browser-mapping": "dist/cli.cjs"
      },
      "engines": {
        "node": ">=6.0.0"
      }
    }
  }
}

{
  "name": "baseline-browser-mapping-sample",
  "version": "1.0.0",
  "dependencies": {
    "baseline-browser-mapping": "2.11.16"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify baseline-browser-mapping._resetHasWarned in pkg:npm/baseline-browser-mapping@2.11.16",
  "kind": "HOW",
  "packages": [
    "pkg:npm/baseline-browser-mapping@2.11.16"
  ],
  "symbols": [
    "baseline-browser-mapping._resetHasWarned"
  ]
}

const {
  _resetHasWarned,
  getCompatibleVersions,
} = require('baseline-browser-mapping');

/**
 * Reset internal warning state for stale data notices.
 *
 * @returns {void}
 */
function resetWarnings() {
  _resetHasWarned();
}

/**
 * Query browser versions compatible with Baseline specifications.
 *
 * @param {import('baseline-browser-mapping').Options} [options]
 * @returns {import('baseline-browser-mapping').BrowserVersion[]}
 */
function queryCompatibleVersions(options) {
  return getCompatibleVersions(options);
}

module.exports = {
  _resetHasWarned,
  resetWarnings,
  queryCompatibleVersions,
};

const assert = require('node:assert/strict');
const {
  _resetHasWarned: libResetHasWarned,
} = require('baseline-browser-mapping');
const {
  _resetHasWarned,
  resetWarnings,
  queryCompatibleVersions,
} = require('../src/index.js');

// Contract 1: _resetHasWarned is exported as a callable function that returns undefined
{
  assert.strictEqual(typeof _resetHasWarned, 'function', '_resetHasWarned should be a function');
  assert.strictEqual(typeof libResetHasWarned, 'function', 'baseline-browser-mapping._resetHasWarned should be a function');
  const result = _resetHasWarned();
  assert.strictEqual(result, undefined, '_resetHasWarned should return undefined');
  const libResult = libResetHasWarned();
  assert.strictEqual(libResult, undefined, 'baseline-browser-mapping._resetHasWarned should return undefined');
}

// Contract 2: _resetHasWarned resets internal warning state allowing stale data warning to fire again
{
  delete process.env.BROWSERSLIST_IGNORE_OLD_DATA;
  delete process.env.BASELINE_BROWSER_MAPPING_IGNORE_OLD_DATA;

  let warnings = [];
  const origWarn = console.warn;
  console.warn = (msg) => {
    warnings.push(msg);
  };

  try {
    _resetHasWarned();

    const currentYear = new Date().getFullYear();
    const opts = { overrideLastUpdated: 0, targetYear: currentYear };

    warnings = [];
    queryCompatibleVersions(opts);
    assert.strictEqual(warnings.length, 1, 'first call should emit a stale data warning');
    assert.ok(
      typeof warnings[0] === 'string' && warnings[0].includes('[baseline-browser-mapping]'),
      'warning should mention [baseline-browser-mapping]'
    );

    warnings = [];
    queryCompatibleVersions(opts);
    assert.strictEqual(warnings.length, 0, 'second call should suppress warning');

    _resetHasWarned();

    warnings = [];
    queryCompatibleVersions(opts);
    assert.strictEqual(warnings.length, 1, 'call after _resetHasWarned should emit warning again');
    assert.ok(
      typeof warnings[0] === 'string' && warnings[0].includes('[baseline-browser-mapping]'),
      'warning after reset should mention [baseline-browser-mapping]'
    );

    warnings = [];
    queryCompatibleVersions(opts);
    assert.strictEqual(warnings.length, 0, 'call before wrapper reset should be suppressed');

    resetWarnings();
    warnings = [];
    queryCompatibleVersions(opts);
    assert.strictEqual(warnings.length, 1, 'call after resetWarnings wrapper should emit warning again');
  } finally {
    console.warn = origWarn;
  }
}

// Contract 3: _resetHasWarned can be safely called repeatedly without throwing
{
  assert.doesNotThrow(() => {
    for (let i = 0; i < 5; i++) {
      _resetHasWarned();
      resetWarnings();
    }
  }, '_resetHasWarned should be safely idempotent');
}

console.log('All pkg:npm/baseline-browser-mapping@2.11.16 baseline-browser-mapping._resetHasWarned contracts passed successfully.');