static void Main(string[] args)
{
var invoker = new ModifyRectangleSize();
var rectangle = new Rectangle();
var setHeight20Command = new SetHeightCommand(rectangle, 20);
var setHeight30Command = new SetHeightCommand(rectangle, 30);
var setWidth20Command = new SetWidthCommand(rectangle, 20);
invoker.SetCommand(setHeight20Command);
invoker.Invoke();
invoker.SetCommand(setWidth20Command);
invoker.Invoke();
invoker.SetCommand(setHeight30Command);
invoker.Invoke();
Console.ReadLine();
}
public void MultipleCommandInvoke_ShouldSetCorrectValue()
{
var rectangle = new Rectangle();
var setHeight20Command = new SetHeightCommand(rectangle, 20);
var setHeight30Command = new SetHeightCommand(rectangle, 30);
var setWidth20Command = new SetWidthCommand(rectangle, 20);
_invoker.SetCommand(setHeight20Command);
_invoker.Invoke();
_invoker.SetCommand(setWidth20Command);
_invoker.Invoke();
_invoker.SetCommand(setHeight30Command);
_invoker.Invoke();
Assert.Equal(30, rectangle.Height);
Assert.Equal(20, rectangle.Width);
}
public void WidthUndo_ShouldUndoLastCommand()
{
var rectangle = new Rectangle();
var setWidth20Command = new SetWidthCommand(rectangle, 20);
var setWidth30Command = new SetWidthCommand(rectangle, 30);
_invoker.SetCommand(setWidth20Command);
_invoker.Invoke();
_invoker.SetCommand(setWidth30Command);
_invoker.Invoke();
Assert.Equal(30, rectangle.Width);
setWidth30Command.Undo();
_invoker.Invoke();
Assert.Equal(20, rectangle.Width);
}