text: var expect = require('expect.js');
  var Promise = require('bluebird');
  var bmi = require('../models/bmi');
  
  describe('bmi', function(){
  
    it('Calculates the body mass index', function(done){
      let height = 1.65;
      let weight = 50;
      let bmiObj = new bmi(height, weight);
      bmiObj.calculate();
      expect(bmiObj.bmi).to.be.above(0);
      expect(bmiObj.category()).to.be("Underweight");
      done();
    });
  });
  