@Test
    void verifyOperation() {
        val attributes = PrincipalAttributeRepositoryFetcher.builder()
            .attributeRepository(aggregatingAttributeRepository)
            .principalId("casuser")
            .build()
            .fromAllAttributeRepositories()
            .retrieve();
        assertTrue(attributes.containsKey("grouperGroups"));
        assertTrue(attributes.containsKey("givenName"));
        assertTrue(attributes.containsKey("phone"));
    }
This is {@link GrouperPersonAttributeDaoTests}.

@author Misagh Moayyed
@since 6.4.0
support/cas-server-support-grouper/src/test/java/org/apereo/cas/grouper/GrouperPersonAttributeDaoTests.java