@Test
    void verifyOperation() {
        val cipher = new OAuth20RegisteredServiceJwtAccessTokenCipherExecutor();
        assertTrue(cipher.getSigningKey(RegisteredServiceTestUtils.getRegisteredService()).isEmpty());
        assertTrue(cipher.getEncryptionKey(RegisteredServiceTestUtils.getRegisteredService()).isEmpty());
    }
This is {@link OAuth20RegisteredServiceJwtAccessTokenCipherExecutorTests}.

@author Misagh Moayyed
@since 6.4.0
support/cas-server-support-oauth/src/test/java/org/apereo/cas/support/oauth/web/response/accesstoken/response/OAuth20RegisteredServiceJwtAccessTokenCipherExecutorTests.java