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// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package poll_test
import (
"io/ioutil"
"os"
"runtime"
"sync"
"testing"
"time"
)
func TestRead(t *testing.T) {
t.Run("SpecialFile", func(t *testing.T) {
var wg sync.WaitGroup
for _, p := range specialFiles() {
for i := 0; i < 4; i++ {
wg.Add(1)
go func(p string) {
defer wg.Done()
for i := 0; i < 100; i++ {
if _, err := ioutil.ReadFile(p); err != nil {
t.Error(err)
return
}
time.Sleep(time.Nanosecond)
}
}(p)
}
}
wg.Wait()
})
}
func specialFiles() []string {
var ps []string
switch runtime.GOOS {
case "darwin", "dragonfly", "freebsd", "netbsd", "openbsd":
ps = []string{
"/dev/null",
}
case "linux":
ps = []string{
"/dev/null",
"/proc/stat",
"/sys/devices/system/cpu/online",
}
}
nps := ps[:0]
for _, p := range ps {
f, err := os.Open(p)
if err != nil {
continue
}
f.Close()
nps = append(nps, p)
}
return nps
}
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