System.Data.Tests.DataViewTest.SortTests C# (CSharp) Méthode

        public void SortTests()
        {
            DataTable dataTable = new DataTable("itemTable");
            DataColumn dc1 = new DataColumn("itemId", typeof(int));
            DataColumn dc2 = new DataColumn("itemName", typeof(string));

            dataTable.Columns.Add(dc1);
            dataTable.Columns.Add(dc2);

            dataTable.Rows.Add(new object[2] { 1, "First entry" });
            dataTable.Rows.Add(new object[2] { 0, "Second entry" });
            dataTable.Rows.Add(new object[2] { 3, "Third entry" });
            dataTable.Rows.Add(new object[2] { 2, "Fourth entry" });

            DataView dataView = dataTable.DefaultView;

            string s = "Default sorting: ";
            Assert.Equal(1, dataView[0][0]);
            Assert.Equal(0, dataView[1][0]);
            Assert.Equal(3, dataView[2][0]);
            Assert.Equal(2, dataView[3][0]);

            s = "Ascending sorting 1: ";
            dataView.Sort = "itemId ASC";
            Assert.Equal(0, dataView[0][0]);
            Assert.Equal(1, dataView[1][0]);
            Assert.Equal(2, dataView[2][0]);
            Assert.Equal(3, dataView[3][0]);

            s = "Ascending sorting 2: ";
            dataView.Sort = "itemId     ASC";
            Assert.Equal(0, dataView[0][0]);
            Assert.Equal(1, dataView[1][0]);
            Assert.Equal(2, dataView[2][0]);
            Assert.Equal(3, dataView[3][0]);

            s = "Ascending sorting 3: ";
            dataView.Sort = "[itemId] ASC";
            Assert.Equal(0, dataView[0][0]);
            Assert.Equal(1, dataView[1][0]);
            Assert.Equal(2, dataView[2][0]);
            Assert.Equal(3, dataView[3][0]);

            s = "Ascending sorting 4: ";
            dataView.Sort = "[itemId]       ASC";
            Assert.Equal(0, dataView[0][0]);
            Assert.Equal(1, dataView[1][0]);
            Assert.Equal(2, dataView[2][0]);
            Assert.Equal(3, dataView[3][0]);

            s = "Ascending sorting 5: ";
            try
            {
                dataView.Sort = "itemId \tASC";
                Assert.Equal(true, false);
            }
            catch (IndexOutOfRangeException e)
            {
            }

            s = "Descending sorting : ";
            dataView.Sort = "itemId DESC";
            Assert.Equal(3, dataView[0][0]);
            Assert.Equal(2, dataView[1][0]);
            Assert.Equal(1, dataView[2][0]);
            Assert.Equal(0, dataView[3][0]);

            s = "Reverted to default sorting: ";
            dataView.Sort = null;
            Assert.Equal(1, dataView[0][0]);
            Assert.Equal(0, dataView[1][0]);
            Assert.Equal(3, dataView[2][0]);
            Assert.Equal(2, dataView[3][0]);
        }