System.Data.Tests.DataSetTest.GetChanges_Relations_DifferentRowStatesTest C# (CSharp) Метод

        public void GetChanges_Relations_DifferentRowStatesTest()
        {
            DataSet ds = new DataSet("ds");
            DataTable parent = ds.Tables.Add("parent");
            DataTable child = ds.Tables.Add("child");

            parent.Columns.Add("id", typeof(int));
            parent.Columns.Add("name", typeof(string));


            child.Columns.Add("id", typeof(int));
            child.Columns.Add("parent", typeof(int));
            child.Columns.Add("name", typeof(string));

            parent.Rows.Add(new object[] { 1, "mono parent 1" });
            parent.Rows.Add(new object[] { 2, "mono parent 2" });
            parent.Rows.Add(new object[] { 3, "mono parent 3" });
            parent.Rows.Add(new object[] { 4, "mono parent 4" });
            parent.AcceptChanges();

            child.Rows.Add(new object[] { 1, 1, "mono child 1" });
            child.Rows.Add(new object[] { 2, 2, "mono child 2" });
            child.Rows.Add(new object[] { 3, 3, "mono child 3" });
            child.AcceptChanges();

            DataRelation relation = ds.Relations.Add("parent_child",
                                  parent.Columns["id"],
                                  child.Columns["parent"]);

            // modify the parent and get changes
            child.Rows[1]["parent"] = 4;
            DataSet changes = ds.GetChanges();
            DataRow row = changes.Tables["parent"].Rows[0];
            Assert.Equal((int)parent.Rows[3][0], (int)row[0]);
            Assert.Equal(1, changes.Tables["parent"].Rows.Count);
            ds.RejectChanges();

            // delete a child row and get changes.
            child.Rows[0].Delete();
            changes = ds.GetChanges();

            Assert.Equal(changes.Tables.Count, 2);
            Assert.Equal(1, changes.Tables["parent"].Rows.Count);
            Assert.Equal(1, (int)changes.Tables["parent"].Rows[0][0]);
        }
        #endregion // DataSet.GetChanges Tests