@Test
    void verifyGroupsFails() {
        val facade = new DefaultGrouperFacade();
        assertThrows(RuntimeException.class, () -> facade.fetchGroupsFor("casuser"));
    }
This is {@link GrouperFacadeTests}.

@author Misagh Moayyed
@since 6.3.0
support/cas-server-support-grouper-core/src/test/java/org/apereo/cas/grouper/GrouperFacadeTests.java