20180929 tddbc tokyo golang implementation

vending_machine.go

package vending

type VendingMachine struct {
	haveMoney int
	priceList map[string]int
}

func NewVendingMachine() *VendingMachine {
	vendingMachine := new(VendingMachine)
	m := make(map[string]int)
	m["レッドブル"] = 200
	m["アサイードリンク"] = 300
	m["コーラ"] = 100
	m["烏龍茶"] = 100
	vendingMachine.priceList = m
	return vendingMachine
}

func (v *VendingMachine) PushButton(drinkName string) string {
	if v.haveMoney >= v.priceList[drinkName] {
		v.haveMoney -= v.priceList[drinkName]
		return drinkName
	}
	return ""
}

func (v *VendingMachine) InsertCoin(coin int) bool {
	if coin == 100 || coin == 50 || coin == 10 || coin == 500 {
		v.haveMoney += coin
		return true
	}
	return false
}

func (v *VendingMachine) HaveMoney(value int) bool {
	return value == v.haveMoney
}

func (v *VendingMachine) OnLightButton(drinkName string) bool {
	if v.haveMoney >= v.priceList[drinkName] {
		return true
	}
	return false
}

func (v *VendingMachine) BackMoney() int {
	return v.haveMoney
}