Repro for Jest issue

main.js

'use strict';
const firebase = require("firebase-admin");

const serviceAccount = require('./serviceAccountKey.json');

firebase.initializeApp({
    credential: firebase.credential.cert(serviceAccount),
    databaseURL: `https://${serviceAccount.project_id}.firebaseio.com`
});

exports.handler = async () => {
  await firebase
      .database()
      .ref(`/someRef`)
      .set({some:"data"});
}

main.test.js

const pushToFirebase = require("./main.js");

test("can push message", async () => {
  await pushToFirebase.handler();
  expect(true).toEqual(true);
  // this will hang - need to call firebase.database().goOffline() to close all handles
});

package.json

{
  "name": "pushtofirebase",
  "version": "1.0.0",
  "main": "pushToFirebase.js",
  "dependencies": {
    "firebase-admin": "^8.10.0"
  },
  "devDependencies": {
    "jest": "^25.2.3"
  }
}