System.Data.Tests.ConstraintCollectionTest2.IndexOf_ByName C# (CSharp) Метод

        public void IndexOf_ByName()
        {
            DataTable dt = DataProvider.CreateUniqueConstraint();
            dt.Constraints[0].ConstraintName = "name1";
            Assert.Equal(0, dt.Constraints.IndexOf("name1"));

            //Add new constraint
            Constraint con = new UniqueConstraint(dt.Columns["String1"], false);
            con.ConstraintName = "name2";

            dt.Constraints.Add(con);
            Assert.Equal(1, dt.Constraints.IndexOf("name2"));

            //Remove it and try to look for it 

            dt.Constraints.Remove(con);
            Assert.Equal(-1, dt.Constraints.IndexOf("name2"));
        }