System.Data.Tests.DataColumnTest.CalcStatisticalFunction_SingleElement C# (CSharp) Method

        public void CalcStatisticalFunction_SingleElement()
        {
            DataTable table = new DataTable();
            table.Columns.Add("test", typeof(int));

            table.Rows.Add(new object[] { 0 });
            table.Columns.Add("result_var", typeof(double), "var(test)");
            table.Columns.Add("result_stdev", typeof(double), "stdev(test)");

            // Check DBNull.Value is set as the result 
            Assert.Equal(typeof(DBNull), (table.Rows[0]["result_var"]).GetType());
            Assert.Equal(typeof(DBNull), (table.Rows[0]["result_stdev"]).GetType());
        }