public async Task TotalParts()
        {
            //Arrange
            var dbOptions = new DbContextOptionsBuilder <HyperCarsDbContext>()
                            .UseInMemoryDatabase("HyperCarsDb")
                            .Options;

            var db = new HyperCarsDbContext(dbOptions);

            var partService = new PartService(db);

            await db.SaveChangesAsync();

            //Act
            var result = partService.Total();

            //Assert
            result.Equals(db.Parts.CountAsync());
        }