System.Data.Tests.DataSetTest.DataSetClearTest C# (CSharp) Method

        public void DataSetClearTest()
        {
            var ds = new DataSet();
            DataTable parent = ds.Tables.Add("Parent");
            DataTable child = ds.Tables.Add("Child");

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

            child.Constraints.Add(new ForeignKeyConstraint("fk_constraint", parent.Columns[0], child.Columns[0]));

            DataRow dr = parent.NewRow();
            dr[0] = 1;
            parent.Rows.Add(dr);
            dr.AcceptChanges();

            dr = child.NewRow();
            dr[0] = 1;
            child.Rows.Add(dr);
            dr.AcceptChanges();

            try
            {
                ds.Clear(); // this should clear all the rows in parent & child tables
            }
            catch (Exception e)
            {
                throw (new Exception("Exception should not have been thrown at Clear method" + e.ToString()));
            }
            Assert.Equal(0, parent.Rows.Count);
            Assert.Equal(0, child.Rows.Count);
        }