public void Test()
{
// 建立对象，并对其进行两次装饰。 bold = false, color= black
IText text = new TextObject();
text = new BoldDecorator(text);
text = new ColorDecorator(text);
Assert.AreEqual <string>("<Black>hello</Black>", text.Content);
// 动态找到需要更新的Decorator并修改相应属性
// bold = false, color = red
ColorState newColorState = new ColorState();
newColorState.Color = Color.Red;
IDecorator root = (IDecorator)text;
root.Refresh <ColorDecorator>(newColorState);
Assert.AreEqual <string>("<Red>hello</Red>", text.Content);
// 动态找到需要更新的Decorator并修改相应属性
// bold = true, color = red
BoldState newBoldState = new BoldState();
newBoldState.IsBold = true;
root.Refresh <BoldDecorator>(newBoldState);
Assert.AreEqual <string>("<Red><b>hello</b></Red>", text.Content);
}
static void Main(string[] args)
{
IText text = new TextObject();
//默认不加粗、黑色字体
text = new BoldDecorator(text);
text = new ColorDecorator(text);
Console.WriteLine(text.Content); //< Black > hello </ Black >
//修改为加粗、红色字体
ColorState colorState = new ColorState();
colorState.Color = Color.Red;
BoldState boldState = new BoldState();
boldState.IsBold = true;
IDecorator root = (IDecorator)text;
root.Refresh <ColorDecorator>(colorState);
root.Refresh <BoldDecorator>(boldState);
Console.WriteLine(text.Content); //< Red >< b > hello </ b ></ Red >
//取消颜色设置
colorState = null;
root.Refresh <ColorDecorator>(colorState);
Console.WriteLine(text.Content); //< b > hello </ b >
}