Not quite correct. Examiners must be approved by each national authority that issued and holds your licence. The paperwork following each revalidation/renewal must be sent to the authority that issued your current licence, I presume Spain. The examiner should know that. Your licence and associated ratings will be part of the transfer from Spain to France. There will be no need to be retested for the EASA unexpired licence and ratings once the transfer to France is complete. All this is also true of your medical.