afterAll fails to close Express server and leaves open handles

🐛 Bug Report

Jest fails to close the Express server in the afterAll hook and leaves an open handle. After running into this issue with both supertest and axiosist, and then trying to roll my own solution, I’m starting to think this is actually an issue with Jest.

• relevant supertest github issue
• relevant axiosist github issue
• relevant stackoverflow question

To Reproduce

1. Clone this repo
2. Checkout the jest-github-issue branch
3. Run npm install
4. Create .env file containing NODE_ENV=test
5. Run npm test

Expected behavior

Jest should close the Express server in the afterAll hook and not leave any open handles

Link to repl or repo (highly encouraged)

https://github.com/johncmunson/todo-api Be sure to checkout the jest-github-issue branch

envinfo

System:
    OS: macOS Mojave 10.14.6
    CPU: (8) x64 Intel(R) Core(TM) i7-4870HQ CPU @ 2.50GHz
  Binaries:
    Node: 10.16.3 - ~/n/bin/node
    Yarn: 1.19.1 - /usr/local/bin/yarn
    npm: 6.9.0 - ~/n/bin/npm
  npmPackages:
    jest: ^24.9.0 => 24.9.0

[SimenB]

Yeah, sounds good! Happy to take any other doc updates to make it clearer as well

[github-actions[bot]]

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