public void GetByBulanAndTahunTest()
        {
            var bulan = 3;
            var tahun = 2017;

            var oList = _bll.GetByBulan(bulan, tahun);

            var index = 1;
            var obj   = oList[index];

            Assert.IsNotNull(obj);
            Assert.AreEqual("576c503f-69a7-46a5-b4be-107c634db7e3", obj.customer_id);
            Assert.AreEqual("Rudi", obj.nama_customer);
            Assert.AreEqual(new DateTime(2017, 3, 2), obj.tanggal);
            Assert.AreEqual(256000, obj.total_pembayaran);
            Assert.AreEqual("Penjualan tunai produk", obj.keterangan);
        }