Mock Express Session

mock-session-3.js

// name = "my-session" ->  base64 value of required object (cookie)
// name.sig = "my-session.sig" -> signed value of cookie using Keygrip

let cookie = Buffer.from(JSON.stringify({"count":2})).toString('base64'); // base64 converted value of cookie

let kg = Keygrip(['testKey']) // same key as I'm using in my app
let hash = kg.sign('my-session=' + cookie);

await request(app).get('api/image/submit').set("Accept", "text/html")
    .set('cookie', ['my-session=' + cookie + '; ' + 'my-session.sig=' + hash + ';'])
    .expect(200);