System.Data.Tests.DataSetTest2.GetChanges_ByDataRowState C# (CSharp) Метод

        public void GetChanges_ByDataRowState()
        {
            var ds = new DataSet();
            object[] arrAdded, arrDeleted, arrModified, arrUnchanged;
            //object[] arrDetached;

            DataRow dr;
            ds.Tables.Add(DataProvider.CreateParentDataTable());

            // GetChanges 1
            Assert.Equal(null, ds.GetChanges());

            //make some changes

            // can't check detached
            //		dr = ds.Tables[0].Rows[0];
            //		arrDetached = dr.ItemArray;
            //		dr.Delete();
            //		ds.Tables[0].AcceptChanges();

            dr = ds.Tables[0].Rows[1];
            arrDeleted = dr.ItemArray;
            dr.Delete();

            dr = ds.Tables[0].Rows[2];
            dr[1] = "NewValue";
            arrModified = dr.ItemArray;

            dr = ds.Tables[0].Select("", "", DataViewRowState.Unchanged)[0];
            arrUnchanged = dr.ItemArray;

            dr = ds.Tables[0].NewRow();
            dr[0] = 1;
            ds.Tables[0].Rows.Add(dr);
            arrAdded = dr.ItemArray;

            // GetChanges Added
            Assert.Equal(arrAdded, ds.GetChanges(DataRowState.Added).Tables[0].Rows[0].ItemArray);

            // GetChanges Deleted
            dr = ds.GetChanges(DataRowState.Deleted).Tables[0].Rows[0];
            object[] tmp = new object[] { dr[0, DataRowVersion.Original], dr[1, DataRowVersion.Original], dr[2, DataRowVersion.Original], dr[3, DataRowVersion.Original], dr[4, DataRowVersion.Original], dr[5, DataRowVersion.Original] };
            Assert.Equal(arrDeleted, tmp);

            //	can't check it	
            //		// GetChanges Detached
            //		dr = ds.GetChanges(DataRowState.Detached).Tables[0].Rows[0];
            //		object[] tmp = new object[] {dr[0,DataRowVersion.Original],dr[1,DataRowVersion.Original],dr[2,DataRowVersion.Original]};
            //		Assert.Equal(arrDetached, tmp);

            // GetChanges Modified
            Assert.Equal(arrModified, ds.GetChanges(DataRowState.Modified).Tables[0].Rows[0].ItemArray);

            // GetChanges Unchanged
            Assert.Equal(arrUnchanged, ds.GetChanges(DataRowState.Unchanged).Tables[0].Rows[0].ItemArray);
        }