@Override
        public Map<String, List<Object>> modifyAttributes(final Map<String, List<Object>> attributes) {
            List<Object> values = new ArrayList<>();
            values.add("newtest");
            attributes.put("test", values);

            values = new ArrayList<>();
            values.add("testing");
            attributes.put(UPN_PARAM, values);
            return attributes;
        }
Test cases for {@link WsFederationAttributeMutator}.

@author John Gasper
@since 4.2.0
support/cas-server-support-wsfederation/src/test/java/org/apereo/cas/support/wsfederation/WsFederationAttributeMutatorTests.java