@MethodSource("supportedMechs")
    @DisplayName("isSupported returns true for supported OIDs")
    void isSupported_supportedOids(ASN1ObjectIdentifier oid) {
        assertTrue(ctx.isSupported(oid));
        assertTrue(ctx.isPreferredMech(oid));
    }

    @Test
    @DisplayName("isSupported returns false for null/unknown OIDs")
    void isSupported_unknownOrNull() {
        assertFalse(ctx.isSupported(null));

        try {
            krbNameOid = new Oid("1.2.840.113554.1.2.2.1");
            krbMechOid = new Oid("1.2.840.113554.1.2.2");
        } catch (Exception e) {
            log.error("Failed to initialize kerberos OIDs", e);
        }

        JGSS_KRB5_NAME_OID = krbNameOid;
        JGSS_KRB5_MECH_OID = krbMechOid;
    }

    private final GSSContext gssContext;
    private final GSSName clientName;