E2E/Jest detected open handle

[trainerbill]

I'm submitting a...

[ ] Regression 
[x ] Bug report
[ ] Feature request
[ ] Documentation issue or request
[ ] Support request => Please do not submit support request here, instead post your question on Stack Overflow.

Current behavior

Jest has detected the following 1 open handle potentially keeping Jest from exiting:

  ●  TCPSERVERWRAP

      18 |   it('/ (GET)', () => {
      19 |     return request(app.getHttpServer())
    > 20 |       .get('/')
         |        ^
      21 |       .expect(200)
      22 |       .expect('Hello World!');
      23 |   });

      at Test.Object.<anonymous>.Test.serverAddress (../node_modules/supertest/lib/test.js:59:33)
      at new Test (../node_modules/supertest/lib/test.js:36:12)
      at Object.obj.(anonymous function) [as get] (../node_modules/supertest/index.js:25:14)
      at Object.it (app.e2e-spec.ts:20:8)

Expected behavior

Expected the e2e test to run successfully

Minimal reproduction of the problem with instructions

nest new nest-test
cd nest-test
npm run test:e2e -- --detectOpenHandles

What is the motivation / use case for changing the behavior?

proper e2e testing

Environment

Nest version: @nestjs/core@5.4.0

 
For Tooling issues:
- Node version: XX  
- Platform:  

Others:

[trainerbill]

I also should note that changing the test to the supertest non promise it works.

it('/ (GET)', (done) => {
    request(app.getHttpServer())
      .get('/')
      .expect(200)
      .expect('Hello World!')
      .end(() => done());
  });

[kamilmysliwiec]

I think that this issue should be rather reported in the supertest repository

[san4io]

Hello, if someone still has issues with it, and as db uses mongo, try:

  afterAll(async () => {
    await Promise.all([app.close(), mongoose.disconnect()]);
  });