@Test
    void verifyOperationWithoutService() throws Throwable {
        val publicKey = endpoint.fetchPublicKey(StringUtils.EMPTY);
        assertEquals(StringUtils.EMPTY, publicKey);
    }
This is {@link JwtTokenCipherSigningPublicKeyEndpointTests}.

@author Misagh Moayyed
@since 6.2.0
support/cas-server-support-token-core/src/test/java/org/apereo/cas/token/JwtTokenCipherSigningPublicKeyEndpointTests.java