text: var expect = require('chai').expect;
   
  const Patient = require('../server/models/patient.model');
   
  describe('patient', function() {
      it('should be invalid if username is empty', function(done) {
          var m = new Patient();
   
          m.validate(function(err) {
              expect(err.errors.username).to.exist;
              done();
          });
      });
  });