public void GetBalmById_ExpectingBalm_ResultShouldReturnBalmViewModel()
        {
            // arrance
            var mockBalmRepository = new Mock <IBalmRepository>();

            var balm = new Balm()
            {
                Id           = Guid.NewGuid(),
                Volume       = 30,
                Brand        = "Balm Brand 1",
                Description  = "Balm Description 1",
                UnitQuantity = 100,
                UnitPrice    = 30,
                URL          = "img/balm1.jpg"
            };

            mockBalmRepository.Setup(x => x.GetById(It.IsAny <Guid>())).Returns(balm);

            var config = new MapperConfiguration(cfg =>
            {
                cfg.CreateMap <Balm, BalmViewModel>();
            });
            var mapper = config.CreateMapper();

            // act
            var balmService = new BalmService(mockBalmRepository.Object, mapper);
            var result      = balmService.GetBalmById(Guid.NewGuid());

            // assert
            result.Should().BeOfType(typeof(BalmViewModel));
        }
        public void GetBalmById_NotExpectingBalm_ResultShouldBeNull()
        {
            // arrance
            var mockBalmRepository = new Mock <IBalmRepository>();
            var mockMapper         = new Mock <IMapper>();

            // act
            var balmService = new BalmService(mockBalmRepository.Object, mockMapper.Object);
            var result      = balmService.GetBalmById(Guid.NewGuid());

            // assert
            result.Should().BeNull();
        }