regex - Mocha Supertest json response body pattern matching issue -

when make api call want inspect returned json results. can see body , static data being checked properly, wherever use regular expression things broken. here example of test:

describe('get user', function() {      it('should return 204 expected json', function(done) {       oauth.passwordtoken({         'username': config.username,         'password': config.password,         'client_id': config.client_id,         'client_secret': config.client_secret,         'grant_type': 'password'       }, function(body) {         request(config.api_endpoint)         .get('/users/me')         .set('authorization', 'bearer ' + body.access_token)         .expect(200)         .expect({           "id": /\d{10}/,           "email": "qa_test+apitest@example.com",           "registered": /./,           "first_name": "",           "last_name": ""         })         .end(function(err, res) {           if (err) return done(err);           done();         });       });     });   }); 

here image of output:

any ideas on using regular expression pattern matching json body response?

i asked question in understanding of framework. else stumbles on this, recommend using chai assertion. helped use regular expression pattern matching in cleaner way.

here example:

res.body.should.have.property('id').and.to.be.a('number').and.to.match(/^[1-9]\d{8,}$/);