text: import {
    INCREMENT,
    DECREMENT,
    INCREMENT_IF_ODD,
    INCREMENT_ASYNC,
    CANCEL_INCREMENT_ASYNC,
    COUNTDOWN_TERMINATED
  } from '../actionTypes'
  
  export function countdown(state = 0, action) {
    switch (action.type) {
      case INCREMENT_ASYNC:
        return action.value
      case COUNTDOWN_TERMINATED:
      case CANCEL_INCREMENT_ASYNC:
        return 0
      default:
        return state
    }
  }
  
  
  
  export function counter(state = 0, action) {
    switch (action.type) {
      case INCREMENT:
        return state + 1
      case DECREMENT:
        return state - 1
      case INCREMENT_IF_ODD:
        return state % 2 ? state + 1 : state
      default:
        return state
    }
  }
  