@nraynaud/xo-vmdk-to-vhd/dist/virtual-buffer.spec.js

JS lib streaming a vmdk file to a vhd

'use strict';

var _regenerator = require('babel-runtime/regenerator');

var _regenerator2 = _interopRequireDefault(_regenerator);

var _asyncToGenerator2 = require('babel-runtime/helpers/asyncToGenerator');

var _asyncToGenerator3 = _interopRequireDefault(_asyncToGenerator2);

var _chai = require('chai');

var _fsPromise = require('fs-promise');

var _mocha = require('mocha');

var _childProcessPromise = require('child-process-promise');

var _virtualBuffer = require('./virtual-buffer');

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

(0, _mocha.describe)('Virtual Buffer', function () {
  var _this = this;

  (0, _mocha.it)('can read a file correctly', (0, _asyncToGenerator3.default)(_regenerator2.default.mark(function _callee() {
    var rawFileName, buffer, part1, part2, original;
    return _regenerator2.default.wrap(function _callee$(_context) {
      while (1) {
        switch (_context.prev = _context.next) {
          case 0:
            rawFileName = 'random-data';
            _context.next = 3;
            return (0, _childProcessPromise.exec)('base64 /dev/urandom | head -c 104448 > ' + rawFileName);

          case 3:
            buffer = new _virtualBuffer.VirtualBuffer((0, _fsPromise.createReadStream)(rawFileName));
            _context.next = 6;
            return buffer.readChunk(10);

          case 6:
            part1 = _context.sent;
            _context.next = 9;
            return buffer.readChunk(-1);

          case 9:
            part2 = _context.sent;
            _context.next = 12;
            return (0, _fsPromise.readFile)(rawFileName);

          case 12:
            original = _context.sent;

            (0, _chai.assert)(buffer.isDepleted, 'virtual buffer is depleted');
            _chai.assert.equal(Buffer.concat([part1, part2]).toString('ascii'), original.toString('ascii'));

          case 15:
          case 'end':
            return _context.stop();
        }
      }
    }, _callee, _this);
  })));
});
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