libgo/go/syscall/syscall_plan9_test.go

   1 // Copyright 2018 The Go Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style
   3 // license that can be found in the LICENSE file.
   4
   5 package syscall_test
   6
   7 import (
   8         "syscall"
   9         "testing"
  10 )
  11
  12 // testalias checks for aliasing of error strings returned by sys1 and sys2,
  13 // which both call the function named fn in package syscall
  14 func testalias(t *testing.T, fn string, sys1, sys2 func() error) {
  15         err := sys1().Error()
  16         errcopy := string([]byte(err))
  17         sys2()
  18         if err != errcopy {
  19                 t.Errorf("syscall.%s error string changed from %q to %q\n", fn, errcopy, err)
  20         }
  21 }
  22
  23 // issue 13770: errors cannot be nested in Plan 9
  24
  25 func TestPlan9Syserr(t *testing.T) {
  26         testalias(t,
  27                 "Syscall",
  28                 func() error {
  29                         return syscall.Mkdir("/", 0)
  30                 },
  31                 func() error {
  32                         return syscall.Mkdir("#", 0)
  33                 })
  34         testalias(t,
  35                 "Syscall6",
  36                 func() error {
  37                         return syscall.Mount(0, 0, "", 0, "")
  38                 },
  39                 func() error {
  40                         return syscall.Mount(-1, 0, "", 0, "")
  41                 })
  42         // originally failed only on plan9_arm
  43         testalias(t,
  44                 "seek",
  45                 func() error {
  46                         _, err := syscall.Seek(0, 0, -1)
  47                         return err
  48                 },
  49                 func() error {
  50                         _, err := syscall.Seek(-1, 0, 0)
  51                         return err
  52                 })
  53 }