finish build pattern

creation/06_builder/builder.go

@@ -3,13 +3,11 @@ package builder
 //ICar 汽车，我们要造车了
 //ICar 车具有以下能力
 type ICar interface {
-	Start()
-	Stop()
 	Speed() int
 	Brand() string
 }
 
-//ICarBuilder 用来造车
+//ICarBuilder 造一辆车需要具有的部件
 type ICarBuilder interface {
 	Wheel(wheel int) ICarBuilder
 	Engine(engine string) ICarBuilder
@@ -20,10 +18,20 @@ type ICarBuilder interface {
 
 //CarProto 车的原型
 type CarProto struct {
-	Wheel    int
-	Engine   string
-	MaxSpeed int
-	Brand    string
+	Wheel     int
+	Engine    string
+	MaxSpeed  int
+	BrandName string
+}
+
+//Speed 最大车速
+func (c *CarProto) Speed() int {
+	return c.MaxSpeed
+}
+
+//Brand 车品牌
+func (c *CarProto) Brand() string {
+	return c.BrandName
 }
 
 //CarStudio 打算通过成立造车实验室进行造车
@@ -44,20 +52,31 @@ func (c *CarStudio) Wheel(wheel int) ICarBuilder {
 
 // Engine of car
 func (c *CarStudio) Engine(engine string) ICarBuilder {
+	c.prototype.Engine = engine
 	return c
 }
 
 // Speed of car
 func (c *CarStudio) Speed(max int) ICarBuilder {
+	c.prototype.MaxSpeed = max
 	return c
 }
 
 // Brand of car
 func (c *CarStudio) Brand(brand string) ICarBuilder {
+	c.prototype.BrandName = brand
 	return c
 }
 
 // Build return a car
 func (c *CarStudio) Build() ICar {
-	return c.prototype
+
+	car := &CarProto{
+		Wheel:     c.prototype.Wheel,
+		Engine:    c.prototype.Engine,
+		MaxSpeed:  c.prototype.MaxSpeed,
+		BrandName: c.prototype.BrandName,
+	}
+
+	return car
 }

creation/06_builder/builder_test.go

@@ -1,23 +1,21 @@
 package builder
 
-import "testing"
+import (
+	"fmt"
+	"testing"
+)
 
-func TestBuilder1(t *testing.T) {
-	builder := &Builder1{}
-	director := NewDirector(builder)
-	director.Construct()
-	res := builder.GetResult()
-	if res != "123" {
-		t.Fatalf("Builder1 fail expect 123 acture %s", res)
+func TestBuilderCar(t *testing.T) {
+	builder := NewCarStudio()
+	builder.Brand("sky").Speed(120).Engine("audi")
+	car := builder.Build()
+	if car.Speed() != 120 {
+		t.Fatalf("Builder1 fail expect 120 ,but get %d", car.Speed())
+	}
+	if car.Brand() != "sky" {
+		t.Fatalf("Builder1 fail expect sky ,but get %s", car.Brand())
 	}
-}
 
-func TestBuilder2(t *testing.T) {
-	builder := &Builder2{}
-	director := NewDirector(builder)
-	director.Construct()
-	res := builder.GetResult()
-	if res != 6 {
-		t.Fatalf("Builder2 fail expect 6 acture %d", res)
-	}
+	fmt.Println(car.Speed())
+	fmt.Println(car.Brand())
 }