hyper-booking / node_modules / bare-assert / index.js

const inspect = require('bare-inspect')

class AssertionError extends Error {
  constructor(opts = {}) {
    let { message = null, actual, expected, operator } = opts

    if (message === null) {
      message = `${inspect(actual)} ${operator} ${inspect(expected)}`
    }

    super(message)

    this.actual = actual
    this.expected = expected
    this.operator = operator
  }

  get name() {
    return 'AssertionError'
  }

  get code() {
    'ASSERTION'
  }
}

function assertFail(opts, fn) {
  if (opts.message instanceof Error) throw opts.message

  const err = new AssertionError(opts)

  if (Error.captureStackTrace) Error.captureStackTrace(err, fn)

  throw err
}

module.exports = exports = function assert(actual, message) {
  if (actual) return

  assertFail({ message, actual, expected: true, operator: '==' }, assert)
}

exports.AssertionError = AssertionError

exports.fail = function fail(message) {
  if (message === undefined) message = 'Failed'

  assertFail({ message, operator: 'fail' }, fail)
}

exports.ok = function ok(actual, message) {
  if (actual) return

  assertFail({ message, actual, expected: true, operator: '==' }, ok)
}

exports.notOk = function ok(actual, message) {
  if (!actual) return

  assertFail({ message, actual, expected: false, operator: '==' }, ok)
}

exports.equal = function equal(actual, expected, message) {
  if (actual == expected || (actual !== actual && expected !== expected)) {
    return
  }

  assertFail({ message, actual, expected, operator: '==' }, equal)
}

exports.notEqual = function notEqual(actual, expected, message) {
  if (actual != expected && (actual === actual || expected === expected)) {
    return
  }

  assertFail({ message, actual, expected, operator: '!=' }, notEqual)
}

exports.strictEqual = function strictEqual(actual, expected, message) {
  if (Object.is(actual, expected)) return

  assertFail(
    { message, actual, expected, operator: 'strictEqual' },
    strictEqual
  )
}

exports.notStrictEqual = function notStrictEqual(actual, expected, message) {
  if (!Object.is(actual, expected)) return

  assertFail(
    { message, actual, expected, operator: 'notStrictEqual' },
    notStrictEqual
  )
}