public void ReturnsNullWhenFieldDoesntExist()
			{			
				var reader = new FakeXsltReader();
				reader.Open("index");
				reader.Read();

				var result = reader.GetFieldValue("foo");
				
				Assert.Null(result);
			}
			public void GetFieldValueReturnsStringWhenColumnExists()
			{
				var reader = new FakeXsltReader();
				reader.Open("index");
				reader.Read();

				var val = reader.GetFieldValue("batch_id");

				Assert.NotEqual(string.Empty, val);
			}
			public void ReturnsStringWhenFieldExists()
			{
				var reader = new FakeXsltReader();
				reader.Open("index");
				reader.Read();

				var result = reader.GetFieldValue("batch_id");

				Assert.NotNull(result);
				Assert.IsType<string>(result);
			}