Set up integration test setup only once

[kevcodez]

Hi there,

I was wondering if it's possible to do a global setup for integration tests ONCE only. I've struggled to do this with Jest, as it seems super unreliable to do so.

What I would like to achieve:

Separate unit and integration tests (already done so by giving it a different file name pattern), run the unit tests just as they come, but for the integration tests, run the setup (starting in-memory Mongo, Redis, ...) only once and share the setup and eventually have a global teardown method taking care of the teardown afterwards.

In jest, this is supposed to be possible with testEnvironments, but they never worked for me, so I was wondering whether Vitest supports a similar approach that would enable a one-time setup/teardown (not per file, but for the entire test suite).

[danielhra]

Did you find a way to achieve this?

[kevcodez]

Still stuck on Jest and suffering in silence

[AriPerkkio]

I was wondering whether Vitest supports a similar approach that would enable a one-time setup/teardown (not per file, but for the entire test suite).

Sounds exactly like a use-case for globalSetup. Does that work for you?

[peacechen]

globalSetup runs for each integration test file. This is a big problem if the tests are run in parallel. There needs to be a way to run a single initialization instance for all the tests.

isolate: false doesn't help unfortunately. The only way I've gotten it to work is to set fileParallelism: false which slows down the tests a lot.

[AriPerkkio]

Without using fileParallelism: false, you can do this with custom reporter:

import { defineConfig } from 'vitest/config'

export default defineConfig({
  test: {
    reporters: {
      onInit() {
        // run setup here
      },
    },
  },
})

[sheremet-va]

globalSetup doesn't run for each integration test file. globalSetup runs once for a project it is defined in. setupFiles run for every test file.