public void GetColumByFieldTest()
        {
            var csv = new CsvFile();

            Assert.IsNull(csv.GetColumByField("Hello"));

            var col = new Column()
            {
                Name = "Column"
            };

            csv.ColumnAdd(col);
            csv.Mapping.Add(new Mapping()
            {
                FileColumn    = "Column",
                TemplateField = "Field"
            });
            Assert.AreEqual(col, csv.GetColumByField("Field"));
        }