test.checkandverify.js

/* eslint-disable no-shadow */
/* eslint-disable no-loop-func */
var should = require('chai').should();
var chance = require('chance').Chance();
var bufferFactory = require('buffer-factory');
var crc16 = require('../index');

function generateRandomStr(option) {
  option = option || {};
  var len = Math.ceil(Math.random() * option.maxLen);
  var str = chance.string({ length: len });
  return str;
}
function generateRandomHex(option) {
  option = option || {};
  var len = Math.ceil(Math.random() * option.maxLen * 0.5) * 2;
  var str = chance.string({
    length: len,
    pool: '0123456789abcdef',
  });
  return str;
}

describe('Check sum and verify it', () => {
  describe('When input stream is a random string', () => {
    for (var i = 0; i < 10000; i++) {
      var randomStr = generateRandomStr({ maxLen: 100 });
      var randomBuf = (bufferFactory(randomStr)).toString('hex');
      var sum = crc16.checkSum(randomBuf);
      (function (randomStr, randomBuf, sum) {
        it(`UTF8 string \`${randomStr}\` sum \`${sum}\``, () => {
          sum.should.be.a('string');
          var streamWithSum = randomBuf + sum;
          var isValid = crc16.verifySum(streamWithSum);
          isValid.should.equal(true);
        });
      }(randomStr, randomBuf, sum));
    }
  });

  describe('When input stram is a random hex', () => {
    for (var i = 0; i < 10000; i++) {
      var randomStr = generateRandomHex({ maxLen: 100 });
      var sum = crc16.checkSum(randomStr);
      (function (randomStr, sum) {
        it(`Hex string \`${randomStr}\` sum \`${sum}\``, () => {
          sum.should.be.a('string');
          var streamWithSum = randomStr + sum;
          var isValid = crc16.verifySum(streamWithSum);
          isValid.should.equal(true);
        });
      }(randomStr, sum));
    }
  });
});