using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DotnetStreamsTests.Testables
{
	public class ListTextReader : TextReader
	{
		private readonly IEnumerator<string> enumerator;
		public ListTextReader(IEnumerable<string> data)
		{
			enumerator = data.GetEnumerator();
		}

		public override string ReadLine()
		{
			if (enumerator.MoveNext())
				return enumerator.Current;
			else
				return null;
		}
	}
}