refine Alert example for state pattern

behavior/10_state/state_clock.go

@@ -4,45 +4,45 @@ package state
 ////////////////////////////////
 //闹装有两种状态，震铃状态，非震铃状态
 
-// MobileAlertStater provides a common interface for various states.
+// AlertStater provides a common interface for various states.
-type MobileAlertStater interface {
+type AlertStater interface {
 	Alert() string
 }
 
-// MobileAlert implements an alert depending on its state.
+// Alert implements an alert depending on its state.
-type MobileAlert struct {
+type Alert struct {
-	state MobileAlertStater
+	state AlertStater
 }
 
-// Alert returns a alert string
+// Alert returns a alert string 代表振铃
-func (a *MobileAlert) Alert() string {
+func (a *Alert) Alert() string {
 	return a.state.Alert()
 }
 
 // SetState changes state
-func (a *MobileAlert) SetState(state MobileAlertStater) {
+func (a *Alert) SetState(state AlertStater) {
 	a.state = state
 }
 
-// NewMobileAlert is the MobileAlert constructor.
+// NewAlert is the Alert constructor，默认振铃是震动
-func NewMobileAlert() *MobileAlert {
+func NewAlert() *Alert {
-	return &MobileAlert{state: &MobileAlertVibration{}}
+	return &Alert{state: &AlertVibration{}}
 }
 
-// MobileAlertVibration implements vibration alert
+// AlertVibration implements vibration alert
-type MobileAlertVibration struct {
+type AlertVibration struct {
 }
 
-// Alert returns a alert string
+// Alert returns a alert string ，默认振铃
-func (a *MobileAlertVibration) Alert() string {
+func (a *AlertVibration) Alert() string {
 	return "vibrating humming ... vibrating humming...vibrating humming..."
 }
 
-// MobileAlertSong implements beep alert
+// AlertSong implements beep alert
-type MobileAlertSong struct {
+type AlertSong struct {
 }
 
-// Alert returns a alert string
+// Alert returns a new alert string 歌曲振铃，设置这个状态模式，闹钟只会唱歌
-func (a *MobileAlertSong) Alert() string {
+func (a *AlertSong) Alert() string {
 	return "sun rise ,get up ,get up get up..."
 }

behavior/10_state/state_test.go

@@ -8,36 +8,20 @@ func TestState(t *testing.T) {
 		"vibrating humming ... vibrating humming...vibrating humming..." +
 		"sun rise ,get up ,get up get up..."
 
-	mobile := NewMobileAlert()
+	//创建一个手机闹铃
+	mobile := NewAlert()
 
-	result := mobile.Alert()
+	ringsSounds := mobile.Alert()
-	result += mobile.Alert()
 
-	mobile.SetState(&MobileAlertSong{})
+	//叠加振铃声音，振铃响两遍
+	ringsSounds += mobile.Alert()
 
-	result += mobile.Alert()
+	//设置振铃的铃声
+	mobile.SetState(&AlertSong{})
 
-	if result != expect {
+	ringsSounds += mobile.Alert()
+
+	if ringsSounds != expect {
 		t.Errorf("Expect result to equal %s, but %s.\n", expect, result)
 	}
 }
-func TestWeeks(t *testing.T) {
-	ctx := NewDayContext()
-	todayAndNext := func() {
-		ctx.Today()
-		ctx.Next()
-	}
-
-	for i := 0; i < 8; i++ {
-		todayAndNext()
-	}
-	// Output:
-	// Sunday
-	// Monday
-	// Tuesday
-	// Wednesday
-	// Thursday
-	// Friday
-	// Saturday
-	// Sunday
-}