text: var jwt = require('../index');
  var expect = require('chai').expect;
  
  describe('expires option', function() {
  
    it('should work with a number of seconds', function () {
      var token = jwt.sign({foo: 123}, '123', { expiresIn: 10 });
      var result = jwt.verify(token, '123');
      expect(result.exp).to.be.closeTo(Math.floor(Date.now() / 1000) + 10, 0.2);
    });
  
    it('should work with a string', function () {
      var token = jwt.sign({foo: 123}, '123', { expiresIn: '2d' });
      var result = jwt.verify(token, '123');
      var two_days_in_secs = 2 * 24 * 60 * 60;
      expect(result.exp).to.be.closeTo(Math.floor(Date.now() / 1000) + two_days_in_secs, 0.2);
    });
  
    it('should work with a string second example', function () {
      var token = jwt.sign({foo: 123}, '123', { expiresIn: '36h' });
      var result = jwt.verify(token, '123');
      var day_and_a_half_in_secs = 1.5 * 24 * 60 * 60;
      expect(result.exp).to.be.closeTo(Math.floor(Date.now() / 1000) + day_and_a_half_in_secs, 0.2);
    });
  
  
    it('should throw if expires has a bad string format', function () {
      expect(function () {
        jwt.sign({foo: 123}, '123', { expiresIn: '1 monkey' });
      }).to.throw(/"expiresIn" should be a number of seconds or string representing a timespan/);
    });
  
    it('should throw if expires is not an string or number', function () {
      expect(function () {
        jwt.sign({foo: 123}, '123', { expiresIn: { crazy : 213 } });
      }).to.throw(/"expiresIn" should be a number of seconds or string representing a timespan/);
    });
  
  });