node-jsonwebtoken/test/encoding.tests.js

var jwt = require('../index');
var expect = require('chai').expect;
var atob = require('atob');

describe('encoding', function() {

  it('should properly encode the token', function () {
    var expected = 'José';
    var token = jwt.sign({ name: expected }, 'shhhhh');
    var decoded_name = JSON.parse(atob(token.split('.')[1])).name;
    expect(decoded_name).to.equal(expected);
  });

});