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// Copyright 2009 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 net
import (
"fmt"
"runtime"
"testing"
"time"
)
func testTimeout(t *testing.T, network, addr string, readFrom bool) {
fd, err := Dial(network, addr)
if err != nil {
t.Errorf("dial %s %s failed: %v", network, addr, err)
return
}
defer fd.Close()
what := "Read"
if readFrom {
what = "ReadFrom"
}
errc := make(chan error, 1)
go func() {
t0 := time.Now()
fd.SetReadDeadline(time.Now().Add(100 * time.Millisecond))
var b [100]byte
var n int
var err1 error
if readFrom {
n, _, err1 = fd.(PacketConn).ReadFrom(b[0:])
} else {
n, err1 = fd.Read(b[0:])
}
t1 := time.Now()
if n != 0 || err1 == nil || !err1.(Error).Timeout() {
errc <- fmt.Errorf("fd.%s on %s %s did not return 0, timeout: %v, %v", what, network, addr, n, err1)
return
}
if dt := t1.Sub(t0); dt < 50*time.Millisecond || dt > 250*time.Millisecond {
errc <- fmt.Errorf("fd.%s on %s %s took %s, expected 0.1s", what, network, addr, dt)
return
}
errc <- nil
}()
select {
case err := <-errc:
if err != nil {
t.Error(err)
}
case <-time.After(1 * time.Second):
t.Errorf("%s on %s %s took over 1 second, expected 0.1s", what, network, addr)
}
}
func TestTimeoutUDP(t *testing.T) {
if runtime.GOOS == "plan9" {
return
}
testTimeout(t, "udp", "127.0.0.1:53", false)
testTimeout(t, "udp", "127.0.0.1:53", true)
}
func TestTimeoutTCP(t *testing.T) {
if runtime.GOOS == "plan9" {
return
}
// set up a listener that won't talk back
listening := make(chan string)
done := make(chan int)
go runServe(t, "tcp", "127.0.0.1:0", listening, done)
addr := <-listening
testTimeout(t, "tcp", addr, false)
<-done
}
func TestDeadlineReset(t *testing.T) {
if runtime.GOOS == "plan9" {
return
}
ln, err := Listen("tcp", "127.0.0.1:0")
if err != nil {
t.Fatal(err)
}
defer ln.Close()
tl := ln.(*TCPListener)
tl.SetDeadline(time.Now().Add(1 * time.Minute))
tl.SetDeadline(time.Time{}) // reset it
errc := make(chan error, 1)
go func() {
_, err := ln.Accept()
errc <- err
}()
select {
case <-time.After(50 * time.Millisecond):
// Pass.
case err := <-errc:
// Accept should never return; we never
// connected to it.
t.Errorf("unexpected return from Accept; err=%v", err)
}
}
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