public async Task DeleteUsersSampleSetsAsync_ShouldReturnUsersSampleSets2BDeleted()
        {
            //arrange
            int id = 1;
            ProjectDBContext projectDBContext = new ProjectDBContext(options);
            ProjectRepoDB    projectRepoDB    = new ProjectRepoDB(projectDBContext);
            var usersSampleSets2BDeleted      = projectDBContext.UsersSampleSets.Where(i => i.Id == id).FirstOrDefault();

            //act
            var result = await projectRepoDB.DeleteUsersSampleSetsAsync(usersSampleSets2BDeleted);

            //assert
            Assert.Equal(1, result.UserId);
        }