public void ExecuteCommandCyclicTes()
		{
			var textReader = Substitute.For<TextReader>();
			Console.SetIn(textReader);
			var textWriter = Substitute.For<TextWriter>();
			Console.SetOut(textWriter);

			textReader.ReadLine().Returns("scalc '1,2,3");

			textWriter
				.When(t => t.WriteLine("another input please"))
				.Do(c => textReader.ReadLine().Returns(string.Empty));

			var stringCalculator = new StringCalculator();
			stringCalculator.ExecuteAddCyclic();

			textWriter.Received().WriteLine("The result is 6");
			textWriter.Received().WriteLine("another input please");
		}