//test insert true
        public void TestNhanVien_Insert()
        {
            _nvxl = new NhanVienXuLy();
            bool actual;

            try
            {
                NhanVien nv = new NhanVien();
                nv.MaNv       = "NV10";
                nv.TenNv      = "Test";
                nv.Luong      = 1;
                nv.NgaySinh   = DateTime.Now;
                nv.GioiTinh   = "Test";
                nv.DiaChi     = "Test";
                nv.DienThoai  = "123456789";
                nv.ChucVu     = "Test";
                nv.LuongCoBan = 2;
                nv.NgayVaoLam = DateTime.Now;
                _nvxl.NhanVien_Insert(nv);
                actual = true;
            }
            catch (Exception)
            {
                actual = false;
            }
            Assert.AreEqual(true, actual);
            NhanVien nv1 = new NhanVien();

            nv1.MaNv = "NV10";
            _nvxl.NhanVien_Delete(nv1);
        }
        //test delete
        public void TestNhanVien_Delete()
        {
            _nvxl = new NhanVienXuLy();
            bool actual;

            try
            {
                NhanVien nv = new NhanVien();
                nv.MaNv = "NV10";
                _nvxl.NhanVien_Delete(nv);
                actual = true;
            }
            catch (Exception)
            {
                actual = false;
            }
            Assert.AreEqual(true, actual);
        }