text: import {ADD_COUNTER, ADD_TO_CART} from './mutation-types'
  
  export default {
    addCart(context,payload){
     return new Promise((resolve,reject) => {
        // 1.查找之前数组中是否有该商品
      let oldProduct = context.state.cartList.find(item =>item.iid === payload.iid)
      // 2.判断oldProduct
      if(oldProduct){ // 数量+1
        // oldProduct.count += 1
        context.commit(ADD_COUNTER,oldProduct)
        resolve('当前的商品数量+1')
      }else{ // 添加新的商品
        payload.count = 1
        // context.state.cartList.push(payload)
        context.commit(ADD_TO_CART,payload)
        resolve('添加了新的商品')
      }
     })
    }
  }
  