public void PrintLineHello()
{
ICommand command = new PrintLineCommand(new ConstantExpression("Hello"));
StringWriter writer = new StringWriter();
lock (System.Console.Out)
{
TextWriter originalWriter = System.Console.Out;
System.Console.SetOut(writer);
command.Execute(null, null);
System.Console.SetOut(originalWriter);
}
Assert.AreEqual("Hello\r\n", writer.ToString());
}
public void PrintHelloWorldUsingCompositeCommand()
{
ICommand firstCommand = new PrintCommand(new ConstantExpression("Hello "));
ICommand secondCommand = new PrintLineCommand(new ConstantExpression("World"));
CompositeCommand command = new CompositeCommand();
command.AddCommand(firstCommand);
command.AddCommand(secondCommand);
StringWriter writer = new StringWriter();
lock (System.Console.Out)
{
TextWriter originalWriter = System.Console.Out;
System.Console.SetOut(writer);
command.Execute(null, null);
System.Console.SetOut(originalWriter);
}
Assert.AreEqual("Hello World\r\n", writer.ToString());
}
