access req.cookie from supertest - supertest

Question

I set a cookie and I usually access it like this when I need to test a "protected" request.
beforeAll(async () => {
await db.connect();
//sign my user and get the token
const response = await request(app).post("/gettoken").send(credentials);
TOKEN = response.headers["set-cookie"].pop().split(";")[0];
})
//test exemple
it("exemple", async () => {
const result = await request(app).post("/path").set(`Cookie`, TOKEN).send(data);
});
So far I had no problem with it but in one of my function that I want to test I have this line:
user = await getUser(req.cookies.token);
the function getUser is pretty simple:
const userToken = jwt.verify(token, process.env.JWTPRIVATEKEY);
user = await User.findOne({ _id: userToken.payload._id });
return user;
Seems like supertest does not work with req.cookies. Is there any way to set "req.cookies.token" during my test ?

Answer 1

I'm going to answer my own question but please, be aware that I have no idea why it works. Actually I was a bit desperate to not find any solution so I did try something without any hope but, surprisely, it worked.
so basically after restarting docker my console.log were all similars (npm run test vs test with postman)
module.exports.getUser = async (token) => {
console.log(token);
console.log(process.env.JWTPRIVATEKEY);
const userToken = jwt.verify(token, process.env.JWTPRIVATEKEY);
console.log(userToken.payload._id);
const user = await User.find({ _id: userToken.payload._id });
return user;
};
it("with success", async () => {
const question = {
title: "title",
content: "content",
};
const result = await request(app).post("/api/forum/question").set("Cookie", TOKEN).send(question);
console.log(result.body);
expect(result.status).toBe(200);
});
And I had this error:
{ error: { message: "Cannot read property '_id' of null" } }
I did change
const user = await User.findOne({ _id: userToken.payload._id });
by
const user = await User.find({ _id: userToken.payload._id });
And now it works as expected.
If someone can explain me why findOne was not working with test (but was ok with postman) I would be happy to understand... because to me, as beginner, it does not make any sense.