Writing Tests for Async Code using Effect

  create = (
    createCardInput: CreateCardInput
  ): Effect.Effect<undefined, Error, Card> =>
    Effect.tryPromise({
      try: () =>
        this.prisma.card.create({
          data: {
            ...createCardInput
          }
        }),
      catch: (e) => new Error('Error creating new card:' + JSON.stringify(e))
    })

it('should return an effect with an error if the database call fails', async () => {
  let mockCreate = jest.fn().mockImplementationOnce(async () => {
    return Promise.reject('Something went wrong')
  })

  prisma.card.create = mockCreate
  // try/catch or .then/.catch returns error with type any
  await Effect.runPromise(
    service.create({
      front: 'frontText',
      back: 'backText'
    })
  )
})