public static IFibonacciCalculator GetCalculator(Options options)
{
if (options.UseGenerator)
{
return new GeneratorCalculator();
}
return new ArrayCalculator();
}
public static Options ParseOptions(string[] args)
{
var options = new Options();
CommandLine.Parser.Default.ParseArgumentsStrict(args, options);
if (options.InputNumber > 0 || !string.IsNullOrWhiteSpace(options.InputFile) || options.UseInteractiveMode())
{
return options;
}
Console.Error.Write(CommandLine.Text.HelpText.AutoBuild(options));
throw new ArgumentException("Invalid paramater set", "args");
}
public void calculator_defaults_to_array_calculator()
{
//Arrange
var options = new Options()
{
InputNumber = 23
};
//Act
var handler = Program.GetCalculator(options);
//Assert
Assert.IsInstanceOfType(handler, typeof(ArrayCalculator));
}
public void generator_flag_uses_generator_calculator()
{
//Arrange
var options = new Options()
{
InputNumber = 23,
UseGenerator = true
};
//Act
var handler = Program.GetCalculator(options);
//Assert
Assert.IsInstanceOfType(handler, typeof(GeneratorCalculator));
}
public static IOutputHandler GetOutputHandler(Options options)
{
IOutputHandler result = new ConsoleIOHandler();
if (string.IsNullOrWhiteSpace(options.OutputFile))
{
return result;
}
switch (options.OutputFileType)
{
default:
case Options.FileType.PlainText:
return new TextFileIOHandler(options.OutputFile);
case Options.FileType.Xml:
return new XmlIOHandler(options.OutputFile);
}
}
public static IInputHandler GetInputHandler(Options options)
{
if (options.UseInteractiveMode())
{
return new ConsoleIOHandler();
}
if (options.InputNumber > 0)
{
return new GenericIOHandler { InputHandler = () => options.InputNumber };
}
switch (options.InputFileType)
{
default:
case Options.FileType.Undefined:
case Options.FileType.PlainText:
return new TextFileIOHandler(options.InputFile);
case Options.FileType.Xml:
return new XmlIOHandler(options.InputFile);
}
}
public void interactive_and_direct_input_uses_direct_input()
{
//Arrange
var options = new Options()
{
InteractiveMode = true,
InputNumber = 23
};
//Act
var handler = Program.GetInputHandler(options);
//Assert
Assert.IsInstanceOfType(handler, typeof(GenericIOHandler));
}
public void xml_file_input_uses_xml_input()
{
//Arrange
var options = new Options()
{
InteractiveMode = true,
InputNumber = 23,
InputFile = "input.xml"
};
//Act
var handler = Program.GetInputHandler(options);
//Assert
Assert.IsInstanceOfType(handler, typeof(GenericIOHandler));
}
public void output_with_xml_users_xml_handler()
{
//Arrange
var options = new Options()
{
InputNumber = 23,
OutputFile = "file.xml"
};
//Act
var handler = Program.GetOutputHandler(options);
//Assert
Assert.IsInstanceOfType(handler, typeof(XmlIOHandler));
}
public void output_defaults_to_console()
{
//Arrange
var options = new Options()
{
InputNumber = 23,
};
//Act
var handler = Program.GetOutputHandler(options);
//Assert
Assert.IsInstanceOfType(handler, typeof(ConsoleIOHandler));
}
public void interactive_uses_console_handler_input()
{
//Arrange
var options = new Options()
{
InteractiveMode = true
};
//Act
var handler = Program.GetInputHandler(options);
//Assert
Assert.IsInstanceOfType(handler, typeof(ConsoleIOHandler));
}
public void interactive_and_input_file_uses_file_handler_input()
{
//Arrange
var options = new Options()
{
InteractiveMode = true,
InputFile = "input.txt"
};
//Act
var handler = Program.GetInputHandler(options);
//Assert
Assert.IsInstanceOfType(handler, typeof(TextFileIOHandler));
}