Promises makes jest test time out

Hello 👋 Thank you for maintaining this project.

I believe I am experiencing a bug where awaiting a call to get response causes timeout.

Minimal example:

it("TIMEOUT when awaiting", async () => {

    await supertest(app)
        .get("/users/me")
});

it("TIMEOUT when using .then", (done) => {

    supertest(app)
        .get("/users/me")
        .then(response => {

            done();
        });
});

it("WORKING when not using promises at all", () => {

    supertest(app)
        .get("/users/me");
});

The two first tests are failing with the following message: Timeout - Async callback was not invoked within the 5000 ms timeout specified by jest.setTimeout.Timeout - Async callback was not invoked within the 5000 ms timeout specified by jest.setTimeout.Error:

Please let me know if I have left out any useful information.

All the best! Olav

[mojadev]

I’m not sure this is related to the reported or known behaviour, but looked similar in my case and might help others stumbling over this.

For me jest.useFakeTimers() caused supertest to break existing test cases by timing out. I didn’t have time to dig into the cause of this, but given that fakeTimers is quite invasive I wouldn’t consider this a supertest/superagent bug.

[LoganBarnett]

On a project of mine, I was able to work around this by ensuring listen was not called as part of importing the Express app that is passed to request. Essentially, the listen call is done in index.js (our entrypoint) and the Express app is created in app.js. index.js imports app.js. The tests only ever import app.js.