Can I declare a setup file for a specific test or test file?

[CodyBontecou]

I have the need to utilize different MSW server's depending on the test that is running.
I'm currently utilizing a setupFile like so:

import { errorServer } from '@/mocks/msw/server'
import { afterAll, afterEach, beforeAll, vi } from 'vitest'

beforeAll(() => {
  // Mocking new Date()
  vi.useFakeTimers()
  vi.setSystemTime(new Date('2024-05-03T11:00:00Z'))

  // Establish API mocking before all tests.
  errorServer.listen()
})
afterEach(() => errorServer.resetHandlers())
afterAll(() => {
  vi.useRealTimers()
  errorServer.close()
})

But I only want this particular file when testing against error states and have a separate setup file for non-error-state-related tests.

[hi-ogawa]

You can extract beforeAll etc... as a utility and ditch setupFiles completely

// helper.ts
import { errorServer } from '@/mocks/msw/server'
import { afterAll, afterEach, beforeAll, vi } from 'vitest'

export function setupErrorServer() {
  beforeAll(() => ... );
  afterEach(() => ...);
  afterAll(() => ...);
}

// some-file.test.ts
import { test } "vitest"
import { setupErrorServer } from "./helper"

setupErrorServer();

test("something", () => {
  ...
})

If you want to do Vitest magic, then you could technically check current file inside setupFiles:

// my-setup.ts
beforeAll(ctx => { ctx.file; })

or you could use Vitest workspace https://vitest.dev/guide/workspace.html to have a completely separate setupFiles, but either seem overkill.

[CodyBontecou]

Very nice, thanks for the tip. This works perfect.