public async Task CreateGoodsReceivedNoteFreeItemAsync_Returns_New_GetGoodsReceivedNoteFreeItemDto()
        {
            //Arrange
            _fixture.MockGoodsReceivedNoteFreeItemService.Setup(x => x.AddGoodsReceivedNoteFreeItemAsync(It.IsAny <GoodsReceivedNoteFreeItem>()))
            .ReturnsAsync(_fixture.CreatedNewGoodsReceivedNoteFreeItem);

            var repository = new GoodsReceivedNoteFreeItemRepository(AutoMapperSingleton.Mapper, _fixture.MockGoodsReceivedNoteFreeItemService.Object);

            //Act
            var result = await repository.CreateGoodsReceivedNoteFreeItemAsync(_fixture.CreateGoodsReceivedNoteFreeItemDto);

            //Assert
            result.Should().BeOfType(typeof(GetGoodsReceivedNoteFreeItemDto));
            result.Id.Should().Be(3);
            result.ItemTypeName.Should().Be("Grocery");
            result.ItemName.Should().Be("Rice");
            result.ItemUnitPrice.Should().Be(350);
            result.Quantity.Should().Be(5);
        }
        public async Task CreateGoodsReceivedNoteFreeItemAsync_Throws_ConflictException()
        {
            //Arrange
            _fixture.MockGoodsReceivedNoteFreeItemService.Setup(x => x.GetGoodsReceivedNoteFreeItemAsync(It.IsAny <Expression <Func <GoodsReceivedNoteFreeItem, bool> > >()))
            .Returns <Expression <Func <GoodsReceivedNoteFreeItem, bool> > >(expression => Task.FromResult(_fixture.GoodsReceivedNoteFreeItems.AsQueryable().FirstOrDefault(expression)));

            var repository = new GoodsReceivedNoteFreeItemRepository(AutoMapperSingleton.Mapper, _fixture.MockGoodsReceivedNoteFreeItemService.Object);

            //Act
            var exception = await Assert.ThrowsAsync <RestException>(() => repository.CreateGoodsReceivedNoteFreeItemAsync(new CreateGoodsReceivedNoteFreeItemDto
            {
                GoodsReceivedNoteId = 202,
                ItemId        = 20050,
                ItemUnitPrice = 350,
                Quantity      = 5
            }));

            //Assert
            exception.ErrorCode.Should().Be(HttpStatusCode.Conflict);
            exception.ErrorMessage.Should().Be("Item already available for this goods received note.");
            exception.ErrorType.Should().Be(HttpStatusCode.Conflict.ToString());
        }