public void ArgumentNumberVerification_EmptyListArguments_ShouldShowMistakeMessage() { using (var writer = new StringWriter()) { Console.SetOut(writer); string[] args = { }; int expected = 0; Assert.Equal(expected, verification.ArgumentNumberVerification(args)); Assert.Equal(Verification.INVALID_NUMBER_OF_ARGUMENTS + "\r\n" + Verification.METHOD_USAGE + "\r\n", writer.ToString()); } }