System.Data.Tests.DataRelationTest.Creation2 C# (CSharp) Метод

        public void Creation2()
        {
            DataSet Set = new DataSet();
            DataTable Mom2 = new DataTable("Mom");
            DataTable Child2 = new DataTable("Child");
            DataTable Hubby = new DataTable("Hubby");
            Set.Tables.Add(Mom2);
            Set.Tables.Add(Child2);
            Set.Tables.Add(Hubby);

            DataColumn Col = new DataColumn("Name");
            DataColumn Col2 = new DataColumn("ChildName");
            DataColumn Col3 = new DataColumn("hubby");
            Mom2.Columns.Add(Col);
            Mom2.Columns.Add(Col2);
            Mom2.Columns.Add(Col3);

            DataColumn Col4 = new DataColumn("Name");
            DataColumn Col5 = new DataColumn("Age");
            DataColumn Col6 = new DataColumn("father");
            Child2.Columns.Add(Col4);
            Child2.Columns.Add(Col5);
            Child2.Columns.Add(Col6);


            DataColumn Col7 = new DataColumn("Name");
            DataColumn Col8 = new DataColumn("Age");
            Hubby.Columns.Add(Col7);
            Hubby.Columns.Add(Col8);

            DataColumn[] Parents = new DataColumn[2];
            Parents[0] = Col2;
            Parents[1] = Col3;
            DataColumn[] Childs = new DataColumn[2];
            Childs[0] = Col4;
            Childs[1] = Col7;

            Assert.Throws<InvalidConstraintException>(() => new DataRelation("Rel", Parents, Childs));

            Childs[1] = Col6;

            Set.Relations.Add(new DataRelation("Rel", Parents, Childs));

            Assert.Equal(1, Mom2.ChildRelations.Count);
            Assert.Equal(0, Child2.ChildRelations.Count);
            Assert.Equal(0, Mom2.ParentRelations.Count);
            Assert.Equal(1, Child2.ParentRelations.Count);

            DataRelation Test = Child2.ParentRelations[0];
            Assert.Equal("Rel", Test.ToString());
            Assert.Equal("Rel", Test.RelationName);
            Assert.Equal("Mom", Test.ParentTable.TableName);
            Assert.Equal(2, Test.ParentKeyConstraint.Columns.Length);
            Assert.False(Test.ParentKeyConstraint.IsPrimaryKey);
            Assert.Equal(2, Test.ParentColumns.Length);
            Assert.False(Test.Nested);
            Assert.Equal(0, Test.ExtendedProperties.Count);
            Assert.Equal("Child", Test.ChildTable.TableName);
            Assert.Equal("Rel", Test.ChildKeyConstraint.ConstraintName);
            Assert.Equal(2, Test.ChildColumns.Length);
            Assert.Equal(1, Mom2.Constraints.Count);
            Assert.Equal("Constraint1", Mom2.Constraints[0].ToString());
            Assert.Equal(1, Child2.Constraints.Count);
            Assert.Equal(0, Hubby.Constraints.Count);
        }