protected int resolvePort() throws Exception {
            val url = casProperties.getAuthn().getAdaptive().getIpIntel().getBlackDot().getUrl();
            return new URL(SpringExpressionLanguageValueResolver.getInstance().resolve(url)).getPort();
        }
This is {@link BlackDotIPAddressIntelligenceServiceTests}.

@author Misagh Moayyed
@since 6.0.0
core/cas-server-core-authentication/src/test/java/org/apereo/cas/authentication/adaptive/intel/BlackDotIPAddressIntelligenceServiceTests.java