go知识重新整理

Go/DesignPattern/decorator/decorator.go

@@ -0,0 +1,46 @@
+package decorator
+
+//装饰模式：使用对象组合的方式，动态改变或增加对象行为
+
+type Component interface {
+	Calc() int
+}
+
+type ConcreteComponent struct{}
+
+func (*ConcreteComponent) Calc() int {
+	return 0
+}
+
+//warp mul
+func WarpMulDecorator(c Component, num int) Component {
+	return &MulDecorator{
+		Component: c,
+		num:       num,
+	}
+}
+
+type MulDecorator struct {
+	Component
+	num int
+}
+
+func (m *MulDecorator) Calc() int {
+	return m.Component.Calc() * m.num
+}
+
+func WarpAddDecrator(c Component, num int) Component {
+	return &AddDecrator{
+		Component: c,
+		num:       num,
+	}
+}
+
+type AddDecrator struct {
+	Component
+	num int
+}
+
+func (d *AddDecrator) Calc() int {
+	return d.Component.Calc() + d.num
+}

Go/DesignPattern/decorator/decorator_test.go

@@ -0,0 +1,22 @@
+/**
+* @Author:zhoutao
+* @Date:2020/12/11 下午3:46
+* @Desc:
+ */
+
+package decorator
+
+import (
+	"testing"
+)
+
+func TestDecrator(t *testing.T) {
+	var c Component = &ConcreteComponent{}
+	c = WarpAddDecrator(c, 10)
+	c = WarpMulDecorator(c, 8)
+	res := c.Calc()
+	if res != 80 {
+		t.Fatalf("expect 80 ,return %d", res)
+	}
+
+}