NegTokenInit tok = new NegTokenInit(mechs, 0, null, null);
        return tok.toByteArray();
    }

    @Test
    @DisplayName("createContext: rejects NetBIOS/short host names")
    void createContext_rejectsShortNetbiosHost() {
        Kerb5Authenticator auth = new Kerb5Authenticator((Subject) null);

        // Using an uppercase short name (no dot) must throw an unsupported operation
        SmbUnsupportedOperationException ex =