luhn-generator/update/node_modules/is-buffer/test/basic.js

A generator of numbers that passes the validation of Luhn algorithm or Luhn formula, also known as the 'modulus 10' or 'mod 10' algorithm

var isBuffer = require('../')
var test = require('tape')

test('is-buffer', function (t) {
  t.equal(isBuffer(Buffer.alloc(4)), true, 'new Buffer(4)')
  t.equal(isBuffer(Buffer.allocUnsafeSlow(100)), true, 'SlowBuffer(100)')

  t.equal(isBuffer(undefined), false, 'undefined')
  t.equal(isBuffer(null), false, 'null')
  t.equal(isBuffer(''), false, 'empty string')
  t.equal(isBuffer(true), false, 'true')
  t.equal(isBuffer(false), false, 'false')
  t.equal(isBuffer(0), false, '0')
  t.equal(isBuffer(1), false, '1')
  t.equal(isBuffer(1.0), false, '1.0')
  t.equal(isBuffer('string'), false, 'string')
  t.equal(isBuffer({}), false, '{}')
  t.equal(isBuffer([]), false, '[]')
  t.equal(isBuffer(function foo () {}), false, 'function foo () {}')
  t.equal(isBuffer({ isBuffer: null }), false, '{ isBuffer: null }')
  t.equal(isBuffer({ isBuffer: function () { throw new Error() } }), false, '{ isBuffer: function () { throw new Error() } }')

  t.end()
})