DataReaderTestHelper

DataReaderTestHelper.cs

public abstract class DataReaderTestHelper
    {
        private readonly string _tableName;
        public abstract IEnumerable<string> GetColumns();

        protected DataReaderTestHelper(string tableName = "fakeTable")
        {
            _tableName = tableName;
        }

        public DataTable GetDataTable(object values)
        {
            var table = new DataTable();
            table.TableName = _tableName;
            //Add a column for each defined column
            foreach (var column in GetColumns())
            {
                table.Columns.Add(new DataColumn(column));
            }
            var row = GetRow(table, values);
            table.Rows.Add(row);
            return table;
        }

        public IDataReader GetDataReader(object values)
        {
            return new DataTableReader(GetDataTable(values));
        }

        public DataRow GetRow(DataTable table, object values)
        {
            var row = table.NewRow();
            var type = values.GetType();
            foreach (var prop in type.GetProperties())
            {
                row[prop.Name] = prop.GetValue(values, null);
            }
            return row;
        }
    }

PersonDataReaderTestHelper.cs

public class PersonDataReaderTestHelper : DataReaderTestHelper
{
    public override IEnumerable<string> GetColumns()
    {
        return new[] 
        {
             "FirstName",
             "LastName"
        };
    }
}

PersonMappingTests.cs

public void Should_map_person_properties()
{
    var personRow = new
    { 
       FirstName = "firstname", 
       LastName = "lastname"
    };

    var reader = new PersonDataReaderTestHelper()
                     .GetDataReader(personRow);

    var person = new PersonMapper().Map(personRow);

    person.FirstName.Should().Be(personRow.FirstName);
    person.LastName.Should().Be(personRow.LastName);
}