@toryt/contracts/lib/_private/eol.js

Design-by-Contract and Test-by-Contract for JavaScript

/*
  Copyright 2019–2025 Jan Dockx

  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at

  http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
 */

'use strict'

const osEOL = require('os').EOL

const nEOL = '\n'
const rnEOL = '\r\n'

const message = 'STACK MESSAGE'

/**
 * Determine the EOL used by this JavaScript engine in Error stack traces. It turns out this is not always `os.EOL`.
 * The default is '\n' (Unix).
 */
const stackEOL = new Error(message).stack.startsWith(message + rnEOL)
  ? /* istanbul ignore next: platform dependent */ rnEOL
  : nEOL

module.exports = {
  nEOL,
  rnEOL,
  stackEOL,
  osEOL
}