Question juridique clé
Whether the public-law appeal was admissible against the labor court's competence ruling.
Solution extraite
The challenge to subject-matter competence was inadmissible because cantonal remedies had not been exhausted; the issue could be raised only with the final judgment under cantonal law.
Motifs extraits
The labor court did not need to issue a separate appealable ruling when it accepted competence; under Geneva labor-court procedure, the objection is noted in the minutes and reviewed with the final judgment.