.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/sys@v0.0.0-20210124154548-22da62e12c0c/unix/dev_linux_test.go

   1 // Copyright 2017 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 // +build go1.7
   6
   7 package unix_test
   8
   9 import (
  10         "fmt"
  11         "testing"
  12
  13         "golang.org/x/sys/unix"
  14 )
  15
  16 func TestDevices(t *testing.T) {
  17         testCases := []struct {
  18                 path  string
  19                 major uint32
  20                 minor uint32
  21         }{
  22                 // well known major/minor numbers according to
  23                 // https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/admin-guide/devices.txt
  24                 {"/dev/null", 1, 3},
  25                 {"/dev/zero", 1, 5},
  26                 {"/dev/random", 1, 8},
  27                 {"/dev/full", 1, 7},
  28                 {"/dev/urandom", 1, 9},
  29                 {"/dev/tty", 5, 0},
  30         }
  31         for _, tc := range testCases {
  32                 t.Run(fmt.Sprintf("%s %v:%v", tc.path, tc.major, tc.minor), func(t *testing.T) {
  33                         var stat unix.Stat_t
  34                         err := unix.Stat(tc.path, &stat)
  35                         if err != nil {
  36                                 if err == unix.EACCES {
  37                                         t.Skip("no permission to stat device, skipping test")
  38                                 }
  39                                 t.Errorf("failed to stat device: %v", err)
  40                                 return
  41                         }
  42
  43                         dev := uint64(stat.Rdev)
  44                         if unix.Major(dev) != tc.major {
  45                                 t.Errorf("for %s Major(%#x) == %d, want %d", tc.path, dev, unix.Major(dev), tc.major)
  46                         }
  47                         if unix.Minor(dev) != tc.minor {
  48                                 t.Errorf("for %s Minor(%#x) == %d, want %d", tc.path, dev, unix.Minor(dev), tc.minor)
  49                         }
  50                         if unix.Mkdev(tc.major, tc.minor) != dev {
  51                                 t.Errorf("for %s Mkdev(%d, %d) == %#x, want %#x", tc.path, tc.major, tc.minor, unix.Mkdev(tc.major, tc.minor), dev)
  52                         }
  53                 })
  54
  55         }
  56 }