// Copyright 2012 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 race_test import ( "fmt" "net" "net/http" "os" "path/filepath" "sync" "testing" "time" ) func TestNoRaceIOFile(t *testing.T) { x := 0 path := t.TempDir() fname := filepath.Join(path, "data") go func() { x = 42 f, _ := os.Create(fname) f.Write([]byte("done")) f.Close() }() for { f, err := os.Open(fname) if err != nil { time.Sleep(1e6) continue } buf := make([]byte, 100) count, err := f.Read(buf) if count == 0 { time.Sleep(1e6) continue } break } _ = x } var ( regHandler sync.Once handlerData int ) func TestNoRaceIOHttp(t *testing.T) { regHandler.Do(func() { http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) { handlerData++ fmt.Fprintf(w, "test") handlerData++ }) }) ln, err := net.Listen("tcp", "127.0.0.1:0") if err != nil { t.Fatalf("net.Listen: %v", err) } defer ln.Close() go http.Serve(ln, nil) handlerData++ _, err = http.Get("http://" + ln.Addr().String()) if err != nil { t.Fatalf("http.Get: %v", err) } handlerData++ _, err = http.Get("http://" + ln.Addr().String()) if err != nil { t.Fatalf("http.Get: %v", err) } handlerData++ }