    @Test
    public void computeWarningMessageForAddLinkCheck_shouldReturnEndgroupUsersCanCommunicate_GivenSenderIncomingAndReceiverIncoming() {

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