@Test
public void computeWarningMessageForAddLinkCheck_shouldReturnBothgroupUsersCanCommunicate_GivenSenderOutgoingAndReceiverIncoming() {

    Assert.assertEquals(CommunicationService.WARNING_BOTH_GROUPS_USERS_CAN_COMMUNICATE,
            this.service.computeWarningMessageForAddLinkCheck(CommunicationService.Direction.OUTGOING, CommunicationService.Direction.INCOMING));
}