buffa/test/buffer.js

var B = require('../').Buffer
var test = require('tape')

test('utf8 buffer to base64', function (t) {
  t.equal(
    new B('Ձאab', 'utf8').toString('base64'),
    '1YHXkGFi'
  )
  t.end()
})

test('utf8 buffer to hex', function (t) {
  t.equal(
    new B('Ձאab', 'utf8').toString('hex'),
    'd581d7906162'
  )
  t.end()
})

test('utf8 to utf8', function (t) {
  t.equal(
    new B('öäüõÖÄÜÕ', 'utf8').toString('utf8'),
    'öäüõÖÄÜÕ'
  )
  t.end()
})

test('utf16le to utf16', function (t) {
    t.equal(
        new B(new B('abcd', 'utf8').toString('utf16le'), 'utf16le').toString('utf8'),
        'abcd'
    )
    t.end()
})

test('utf16le to hex', function (t) {
    t.equal(
        new B('abcd', 'utf16le').toString('hex'),
        '6100620063006400'
    )
    t.end()
})

test('ascii buffer to base64', function (t) {
  t.equal(
    new B('123456!@#$%^', 'ascii').toString('base64'),
    'MTIzNDU2IUAjJCVe'
  )
  t.end()
})

test('ascii buffer to hex', function (t) {
  t.equal(
    new B('123456!@#$%^', 'ascii').toString('hex'),
    '31323334353621402324255e'
  )
  t.end()
})

test('base64 buffer to utf8', function (t) {
  t.equal(
    new B('1YHXkGFi', 'base64').toString('utf8'),
    'Ձאab'
  )
  t.end()
})

test('hex buffer to utf8', function (t) {
  t.equal(
    new B('d581d7906162', 'hex').toString('utf8'),
    'Ձאab'
  )
  t.end()
})

test('base64 buffer to ascii', function (t) {
  t.equal(
    new B('MTIzNDU2IUAjJCVe', 'base64').toString('ascii'),
    '123456!@#$%^'
  )
  t.end()
})

test('hex buffer to ascii', function (t) {
  t.equal(
    new B('31323334353621402324255e', 'hex').toString('ascii'),
    '123456!@#$%^'
  )
  t.end()
})

test('base64 buffer to binary', function (t) {
  t.equal(
    new B('MTIzNDU2IUAjJCVe', 'base64').toString('binary'),
    '123456!@#$%^'
  )
  t.end()
})

test('hex buffer to binary', function (t) {
  t.equal(
    new B('31323334353621402324255e', 'hex').toString('binary'),
    '123456!@#$%^'
  )
  t.end()
})

test('utf8 to binary', function (t) {
  t.equal(
    new B('öäüõÖÄÜÕ', 'utf8').toString('binary'),
    'öäüõÖÄÜÕ'
  )
  t.end()
})

test('hex of write{Uint,Int}{8,16,32}{LE,BE}', function (t) {
  t.plan(2*(2*2*2+2))
  var hex = [
    '03', '0300', '0003', '03000000', '00000003',
    'fd', 'fdff', 'fffd', 'fdffffff', 'fffffffd'
  ]
  var reads = [ 3, 3, 3, 3, 3, -3, -3, -3, -3, -3 ]
  var xs = ['UInt','Int']
  var ys = [8,16,32]
  for (var i = 0; i < xs.length; i++) {
    var x = xs[i]
    for (var j = 0; j < ys.length; j++) {
      var y = ys[j]
      var endianesses = (y === 8) ? [''] : ['LE','BE']
      for (var k = 0; k < endianesses.length; k++) {
        var z = endianesses[k]

        var v1  = new B(y / 8)
        var writefn  = 'write' + x + y + z
        var val = (x === 'Int') ? -3 : 3
        v1[writefn](val, 0)
        t.equal(
          v1.toString('hex'),
          hex.shift()
        )
        var readfn = 'read' + x + y + z
        t.equal(
          v1[readfn](0),
          reads.shift()
        )
      }
    }
  }
  t.end()
})

test('hex of write{Uint,Int}{8,16,32}{LE,BE} with overflow', function (t) {
    t.plan(3*(2*2*2+2))
    var hex = [
      '', '03', '00', '030000', '000000',
      '', 'fd', 'ff', 'fdffff', 'ffffff'
    ]
    var reads = [
      undefined, 3, 0, 3, 0,
      undefined, 253, -256, 16777213, -256
    ]
    var xs = ['UInt','Int']
    var ys = [8,16,32]
    for (var i = 0; i < xs.length; i++) {
      var x = xs[i]
      for (var j = 0; j < ys.length; j++) {
        var y = ys[j]
        var endianesses = (y === 8) ? [''] : ['LE','BE']
        for (var k = 0; k < endianesses.length; k++) {
          var z = endianesses[k]

          var v1  = new B(y / 8 - 1)
          var next = new B(4)
          next.writeUInt32BE(0, 0)
          var writefn  = 'write' + x + y + z
          var val = (x === 'Int') ? -3 : 3
          v1[writefn](val, 0, true)
          t.equal(
            v1.toString('hex'),
            hex.shift()
          )
          // check that nothing leaked to next buffer.
          t.equal(next.readUInt32BE(0), 0)
          // check that no bytes are read from next buffer.
          next.writeInt32BE(~0, 0)
          var readfn = 'read' + x + y + z
          t.equal(
            v1[readfn](0, true),
            reads.shift()
          )
        }
      }
    }
    t.end()
})

test('concat() a varying number of buffers', function (t) {
  var zero = []
  var one  = [ new B('asdf') ]
  var long = []
  for (var i = 0; i < 10; i++) long.push(new B('asdf'))

  var flatZero = B.concat(zero)
  var flatOne = B.concat(one)
  var flatLong = B.concat(long)
  var flatLongLen = B.concat(long, 40)

  t.equal(flatZero.length, 0)
  t.equal(flatOne.toString(), 'asdf')
  t.equal(flatOne, one[0])
  t.equal(flatLong.toString(), (new Array(10+1).join('asdf')))
  t.equal(flatLongLen.toString(), (new Array(10+1).join('asdf')))
  t.end()
})

test('fill', function(t) {
  var b = new B(10)
  b.fill(2)
  t.equal(b.toString('hex'), '02020202020202020202')
  t.end()
})

test('copy() empty buffer with sourceEnd=0', function (t) {
  var source = new B([42])
  var destination = new B([43])
  source.copy(destination, 0, 0, 0)
  t.equal(destination.readUInt8(0), 43)
  t.end()
})

test('copy() after slice()', function(t) {
  var source = new B(200)
  var dest = new B(200)
  var expected = new B(200)
  for (var i = 0; i < 200; i++) {
    source[i] = i
    dest[i] = 0
  }

  source.slice(2).copy(dest)
  source.copy(expected, 0, 2)
  t.deepEqual(dest, expected)
  t.end()
})

test('base64 ignore whitespace', function(t) {
  var text = '\n   YW9ldQ==  '
  var buf = new B(text, 'base64')
  t.equal(buf.toString(), 'aoeu')
  t.end()
})

test('buffer.slice sets indexes', function (t) {
  t.equal((new B('hallo')).slice(0, 5).toString(), 'hallo')
  t.end()
})

test('buffer.slice out of range', function (t) {
  t.plan(2)
  t.equal((new B('hallo')).slice(0, 10).toString(), 'hallo')
  t.equal((new B('hallo')).slice(10, 2).toString(), '')
  t.end()
})

test('base64 strings without padding', function (t) {
  t.equal((new B('YW9ldQ', 'base64').toString()), 'aoeu')
  t.end()
})