I have a service that is pretty much a wrapper to call an API using useFetch composable.

export default async () => {
  const config = useRuntimeConfig().public

  const { data, error } = await useFetch(
    `${config.BASE_API}/${config.MOVIES}`,
    {
      transform: (res: Movie[]) => {
        return res.slice(0, 10)
      }
    }
  )
  if (error.value) {
    throw createError({
      ...error.value,
      statusMessage: `Não foi possível obter a lista de filmes`
    })
  }

  return data.value ?? []
}

I’m still newbie on tests and I was trying to create a test for this service.

import { describe, it, expect } from 'vitest'
import getMovies from '~/utils/services/movies/getMovies'
import { mockNuxtImport } from '@nuxt/test-utils/runtime'
import type { Movie } from '~/types/Movie'

mockNuxtImport('useRuntimeConfig', () => {
  return () => {
    return {
      public: {
        BASE_API: 'https://dummyapi.online/api',
        MOVIES: '/movies'
      }
    }
  }
})

describe('useClientInfo', () => {
  it('should return an array of movies', async () => {
    const data: Movie[] = await getMovies() //ERROR 500
      .then((res) => {
        expect(Array.isArray(res)).toBe(true)
        return res
      })
      .catch((err) => {
        return []
      })
    expect(data.length).toBeGreaterThan(0)
  })
})

On the page everything goes ok, but I receive a 500 error when testing.

I was in the docs and I believe my problem is something related to this note, on the registered endpoint section.

Note: If your requests in a component go to an external API, you can use baseURL and then make it empty using Nuxt Environment Override Config ($test) so all your requests will go to Nitro server.

But for me is not clear what I really should do.

I added this to my nuxt.config

  $test: {
    app: {
      baseURL: ''
    }
  }

And I can confirm that the test is using the variable defined into mockNuxtImport, but still get the 500 error.
I’m not sure what I’m missing here.

I’ll be very glad if anyone can point me the right direction.
Thanks in advance!