go错误处理

import (
  "errors"
  "testing"
)
 
var LessThanTwoError = errors.New("n should bu in [0,100]")
 
//菲波拉数列 变量赋值
func GetFibonacci(n int) ([]int, error) {
  //及早失败
  if n < 0 {
    return nil, LessThanTwoError
  }
  fibList := []int{1, 1}
  for i := 2; i < n; i++ {
    fibList = append(fibList, fibList[i-1]+fibList[i-2])
  }
  return fibList[:n], nil
}
 
func TestExchange(t *testing.T) {
  if v, err := GetFibonacci(-10); err != nil {
    t.Error(err)
  } else {
    t.Log(v)
  }
}

import (
  "errors"
  "fmt"
  "testing"
)
 
//panic用不不可以恢复的错误
//panic退出前会执行defer指定的内容
 
//os.Exit退出不会执行defer,没有栈调用信息
 
func TestPaincVxExit(t *testing.T) {
  defer func() {
    fmt.Println("Finally!")
  }()
 
  defer func() {
    if err := recover(); err != nil {
      fmt.Println("recover from", err)
    }
  }()
  fmt.Println("start")
  panic(errors.New("something wrong!"))
  //os.Exit(-1)
}