typedarray-to-buffer/test/basic.js

Convert a typed array to a Buffer without a copy

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

test('convert to buffer from uint8array', function (t) {
  if (typeof Uint8Array === 'function') {
    var arr = new Uint8Array([1, 2, 3])
    arr = convertToBuffer(arr)

    t.deepEqual(arr, new Buffer([1, 2, 3]), 'contents equal')
    t.ok(Buffer.isBuffer(arr), 'is buffer')
    t.equal(arr.readUInt16BE(0), 258)
  }
  t.end()
})

test('convert to buffer from another array type (uint32array)', function (t) {
  if (typeof Uint32Array === 'function') {
    var arr = new Uint32Array([1, 2, 3])
    arr = convertToBuffer(arr)

    t.deepEqual(arr, new Buffer([1, 2, 3]), 'contents equal')
    t.ok(Buffer.isBuffer(arr), 'is buffer')
    t.equal(arr.readUInt16BE(0), 258)
  }
  t.end()
})