public void AddItemsTest()
        {
            //_context.Departments.RemoveRange(_context.Departments);
            var repo  = new DepartmentsRepository(_context);
            var item1 = new Department {
                Name = "Department222"
            };
            var item2 = new Department {
                Name = "Department223"
            };

            Department[] items = new Department[] { item1, item2 };

            repo.AddItems(items);
            Assert.AreEqual(items[0].Name, _context.Departments.FirstOrDefault(x => x.Name == "Department222").Name);
            Assert.AreEqual(items[1].Name, _context.Departments.FirstOrDefault(x => x.Name == "Department223").Name);
            _context.Departments.Remove(item1);
            _context.Departments.Remove(item2);
        }