@Test
    void verifyOperation() {
        val listener = ServiceRegistryListener.noOp();
        assertNotNull(listener.postLoad(mock(RegisteredService.class)));
        assertNotNull(listener.preSave(mock(RegisteredService.class)));
        assertEquals(0, listener.getOrder());
    }
This is {@link ServiceRegistryListenerTests}.

@author Misagh Moayyed
@since 6.3.0
api/cas-server-core-api-services/src/test/java/org/apereo/cas/services/ServiceRegistryListenerTests.java