public void GetAllLinksExceptionTest()
        {
            _helpRepoMock.Setup(x => x.GetAllLinks()).Throws <Exception>();

            var response = _helpService.GetAllLinks();

            _mapperMock.Verify(x => x.Map <IList <HelpLinkDto> >(It.IsAny <IList <HelpLink> >()), Times.Never);

            Assert.IsNotNull(response);
            Assert.AreEqual(ResponseCode.ServerError, response.Code);
            Assert.IsNotEmpty(response.ErrorMessage);
            Assert.IsNull(response.Entity);
        }