TypeError: Cannot read property 'address' of undefined supertest
<p>I need some help to resolve my problem with testing on nodejs codes. I'm using mocha and supertest. I'm confused with the implementation in supertest. I don't know to resolved it. I'm trying to automate downloading a file.</p>

<pre><code>describe('GET /entry/:entryId/file/:id/download', function(){
    it('should pass download function', function(done){
        this.timeout(15000);
        request(app.webServer)
            .get('/entry/543CGsdadtrE/file/wDRDasdDASAS/download')
            .set('Authorization', 'Bearer eyJ0eXAiOiJKV1QiLCJhbGco')
            .expect(200)
            .end(function(err, res) {
                if (err) return done(err);
                console.log(err, res);
                done();
            });
    });
});
</code></pre>