System.Data.Tests.InvalidConstraintExceptionTest.Generate C# (CSharp) Метод

        public void Generate()
        {
            DataTable dtParent;
            dtParent = DataProvider.CreateParentDataTable();
            Exception tmpEx = new Exception();

            //------ check ForeignKeyConstraint  ---------
            DataTable dtChild = DataProvider.CreateChildDataTable();
            var ds = new DataSet();
            ds.Tables.Add(dtChild);
            ds.Tables.Add(dtParent);

            ds.Relations.Add(new DataRelation("myRelation", dtParent.Columns[0], dtChild.Columns[0], true));

            //update to value which is not exists in Parent table
            // InvalidConstraintException - update child row
            Assert.Throws<InvalidConstraintException>(() =>
            {
                dtChild.Rows[0]["ParentId"] = 99;
            });

            //Add another relation to the same column of the existing relation in child table
            // InvalidConstraintException - Add Relation Child
            Assert.Throws<InvalidConstraintException>(() =>
            {
                ds.Relations.Add(new DataRelation("test", dtParent.Columns[2], dtChild.Columns[0], true));
            });

            //Attempt to clear rows from parent table 
            // InvalidConstraintException - RowsCollection.Clear
            Assert.Throws<InvalidConstraintException>(() =>
            {
                dtParent.Rows.Clear();
            });

            //try to run commands on two different datasets
            DataSet ds1 = new DataSet();
            ds1.Tables.Add(dtParent.Copy());

            // InvalidConstraintException - Add relation with two DataSets
            Assert.Throws<InvalidConstraintException>(() =>
            {
                ds.Relations.Add(new DataRelation("myRelation", ds1.Tables[0].Columns[0], dtChild.Columns[0], true));
            });
        }
    }