assertFalse(nonAnon.isAnonymous());
    }

    static Object[][] preferredMechData_nonAnonymous() {
        return new Object[][] { { Kerb5Context.SUPPORTED_MECHS[0], true }, { Kerb5Context.SUPPORTED_MECHS[1], true },
                { new ASN1ObjectIdentifier("1.2.3.4.5"), false } };
    }

    @ParameterizedTest(name = "non-anon preferred mech {0} -> {1}")

    static final ASN1ObjectIdentifier[] SUPPORTED_MECHS;
    private static final Oid JGSS_KRB5_NAME_OID;
    private static final Oid JGSS_KRB5_MECH_OID;

    static {
        KRB5_MECH_OID = new ASN1ObjectIdentifier("1.2.840.113554.1.2.2");
        KRB5_MS_MECH_OID = new ASN1ObjectIdentifier("1.2.840.48018.1.2.2");
        SUPPORTED_MECHS = new ASN1ObjectIdentifier[] { KRB5_MECH_OID, KRB5_MS_MECH_OID };

        Field f = target.getClass().getDeclaredField(name);
        f.setAccessible(true);
        f.set(target, value);
    }

    static ASN1ObjectIdentifier[] supportedMechs() {
        return Kerb5Context.SUPPORTED_MECHS;
    }

    @ParameterizedTest
    @MethodSource("supportedMechs")
    @DisplayName("isSupported returns true for supported OIDs")
    void isSupported_supportedOids(ASN1ObjectIdentifier oid) {

                Set<ASN1ObjectIdentifier> mechs = new HashSet<>(Arrays.asList(tok.getMechanisms()));
                boolean foundKerberos = false;
                for (ASN1ObjectIdentifier mech : Kerb5Context.SUPPORTED_MECHS) {
                    foundKerberos |= mechs.contains(mech);
                }
                if ((!foundKerberos || this.forceFallback) && this.canFallback && tc.getConfig().isAllowNTLMFallback()) {