@Test
    void verifyOperation() throws Exception {
        val id = UUID.randomUUID().toString();
        val principal = CoreAuthenticationTestUtils.getPrincipal(Map.of("registrationToken", List.of(id)));
        assertDoesNotThrow(() -> {
            notificationSender.notify(principal, Map.of("title", "Hello", "message", "World"));
            Thread.sleep(2000);
        });
    }
This is {@link APNMessagingNotificationSenderTests}.

@author Misagh Moayyed
@since 7.2.0
support/cas-server-support-notifications-apn/src/test/java/org/apereo/cas/notifications/APNMessagingNotificationSenderTests.java