@Test
    void verifyExpired() {
        val secret = UUID.randomUUID().toString();
        val service = getOidcRegisteredService();
        service.setClientSecret(secret);
        service.setClientSecretExpiration(ZonedDateTime.now(ZoneOffset.UTC).minusHours(1).toEpochSecond());
        val results = oauth20ClientSecretValidator.validate(service, secret);
        assertFalse(results);
    }
This is {@link OidcClientSecretValidatorTests}.

@author Misagh Moayyed
@since 6.6.0
support/cas-server-support-oidc/src/test/java/org/apereo/cas/oidc/web/OidcClientSecretValidatorTests.java