@Test
    void verifyNoSmsSender() {
        assertFalse(communicationsManager.isSmsSenderDefined());
        assertFalse(communicationsManager.sms(SmsRequest.builder().build()));
    }
This is {@link DefaultCommunicationsManagerTests}.

@author Misagh Moayyed
@since 5.3.0
core/cas-server-core-notifications/src/test/java/org/apereo/cas/notifications/DefaultCommunicationsManagerTests.java