@Test
    void verifyEncodedWithPrefix() {
        val attributes = new LinkedHashMap<String, Object>();
        attributes.put("_MAIL_", "casuser@example.org");
        val results = encoder.encodeAttributes(Map.of(), attributes, registeredService, webApplicationService);
        ProtocolAttributeEncoder.decodeAttributes(results, registeredService, webApplicationService);
    }
This is {@link DefaultCasProtocolAttributeEncoderTests}.

@author Misagh Moayyed
@since 6.0.0
core/cas-server-core-services-authentication/src/test/java/org/apereo/cas/authentication/support/DefaultCasProtocolAttributeEncoderTests.java