testing.js

var main = require('../src/main.js');

describe('main', function() {
  describe('init()', function() {
    it('set the name property to the name passed in', function() {

    });
  });

  describe('calculate()', function() {
    it('should add the number to 5', function() {
      var testNum = 1;
      var expected = testNum + 5;

      var actual = main.calculate(testNum);

      assert(actual === expected);
    });

    it('should return nothing if you pass in non-number', function() {
      var testVal = 'something';
      var expected = undefined;

      var actual = main.calculate(testVal);

      assert(actual === expected);
    });
  });
});


var main = {
  init: function(name) {
    this.name = name;
  },

  calculate(num: number) {
    return num + 5;
  }
};

module.exports = main;