libgo/go/net/timeout_test.go

   1 // Copyright 2009 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 net
   6
   7 import (
   8         "os"
   9         "testing"
  10         "time"
  11         "runtime"
  12 )
  13
  14 func testTimeout(t *testing.T, network, addr string, readFrom bool) {
  15         // Timeouts are not implemented on windows.
  16         if runtime.GOOS == "windows" {
  17                 return
  18         }
  19         fd, err := Dial(network, "", addr)
  20         if err != nil {
  21                 t.Errorf("dial %s %s failed: %v", network, addr, err)
  22                 return
  23         }
  24         defer fd.Close()
  25         t0 := time.Nanoseconds()
  26         fd.SetReadTimeout(1e8) // 100ms
  27         var b [100]byte
  28         var n int
  29         var err1 os.Error
  30         if readFrom {
  31                 n, _, err1 = fd.(PacketConn).ReadFrom(b[0:])
  32         } else {
  33                 n, err1 = fd.Read(b[0:])
  34         }
  35         t1 := time.Nanoseconds()
  36         what := "Read"
  37         if readFrom {
  38                 what = "ReadFrom"
  39         }
  40         if n != 0 || err1 == nil || !err1.(Error).Timeout() {
  41                 t.Errorf("fd.%s on %s %s did not return 0, timeout: %v, %v", what, network, addr, n, err1)
  42         }
  43         if t1-t0 < 0.5e8 || t1-t0 > 1.5e8 {
  44                 t.Errorf("fd.%s on %s %s took %f seconds, expected 0.1", what, network, addr, float64(t1-t0)/1e9)
  45         }
  46 }
  47
  48 func TestTimeoutUDP(t *testing.T) {
  49         testTimeout(t, "udp", "127.0.0.1:53", false)
  50         testTimeout(t, "udp", "127.0.0.1:53", true)
  51 }
  52
  53 func TestTimeoutTCP(t *testing.T) {
  54         // 74.125.19.99 is www.google.com.
  55         // could use dns, but dns depends on
  56         // timeouts and this is the timeout test.
  57         testTimeout(t, "tcp", "74.125.19.99:80", false)
  58 }