node-buffer-bytelength.ts

import assert from '../../harness/wrapped-assert';

export default function() {
  // coerce values to string
  assert.equal(Buffer.byteLength(<any> 32, 'binary'), 2);
  assert.equal(Buffer.byteLength(<any> NaN, 'utf8'), 3);
  assert.equal(Buffer.byteLength(<any> {}, 'binary'), 15);
  assert.equal((<any> Buffer).byteLength(), 9);

  // special case: zero length string
  assert.equal(Buffer.byteLength('', 'ascii'), 0);
  assert.equal(Buffer.byteLength('', 'HeX'), 0);

  // utf8
  assert.equal(Buffer.byteLength('∑éllö wørl∂!', 'utf-8'), 19);
  assert.equal(Buffer.byteLength('κλμνξο', 'utf8'), 12);
  assert.equal(Buffer.byteLength('挵挶挷挸挹', 'utf-8'), 15);
  assert.equal(Buffer.byteLength('𠝹𠱓𠱸', 'UTF8'), 12);
  // without an encoding, utf8 should be assumed
  assert.equal(Buffer.byteLength('hey there'), 9);
  assert.equal(Buffer.byteLength('𠱸挶νξ#xx :)'), 17);
  assert.equal(Buffer.byteLength('hello world', ''), 11);
  // it should also be assumed with unrecognized encoding
  assert.equal(Buffer.byteLength('hello world', 'abc'), 11);
  assert.equal(Buffer.byteLength('ßœ∑≈', 'unkn0wn enc0ding'), 10);

  // base64
  assert.equal(Buffer.byteLength('aGVsbG8gd29ybGQ=', 'base64'), 11);
  assert.equal(Buffer.byteLength('bm9kZS5qcyByb2NrcyE=', 'base64'), 14);
  assert.equal(Buffer.byteLength('aGkk', 'base64'), 3);
  assert.equal(Buffer.byteLength('bHNrZGZsa3NqZmtsc2xrZmFqc2RsZmtqcw==',
      'base64'), 25);
  // special padding
  assert.equal(Buffer.byteLength('aaa=', 'base64'), 2);
  assert.equal(Buffer.byteLength('aaaa==', 'base64'), 3);

  assert.equal(Buffer.byteLength('Il était tué'), 14);
  assert.equal(Buffer.byteLength('Il était tué', 'utf8'), 14);
  assert.equal(Buffer.byteLength('Il était tué', 'ascii'), 12);
  assert.equal(Buffer.byteLength('Il était tué', 'binary'), 12);
  ['ucs2', 'ucs-2', 'utf16le', 'utf-16le'].forEach(function(encoding) {
    assert.equal(24, Buffer.byteLength('Il était tué', encoding));
  });
};