Jest did not exit one second after the test run has completed using express
My problem was solved by this code:
beforeAll(done => { done()})afterAll(done => { // Closing the DB connection allows Jest to exit successfully. mongoose.connection.close() done()})
I was having the same issue but in my package.json file i added "test": "jest --detectOpenHandles" and ran npm test --detectOpenHandles. I didn't get the error message this time. Maybe you can try doing that.
On my side, I just separate app.listen() from my app.So with express, your app finish with an export.
// index.jsmodule.exports = app;And just create another file to listen the port.
// server.jsconst app = require('./index')app.listen(...)And if you import just the index (app index.js) in your tests, it should work with no extra config.Of course your need to adjust the start of your express app. It should use now server.js.