706 lines
16 KiB
Go
706 lines
16 KiB
Go
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package net
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import (
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"fmt"
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"io"
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"io/ioutil"
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"runtime"
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"testing"
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"time"
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)
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func isTimeout(err error) bool {
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e, ok := err.(Error)
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return ok && e.Timeout()
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}
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type copyRes struct {
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n int64
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err error
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d time.Duration
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}
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func TestAcceptTimeout(t *testing.T) {
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switch runtime.GOOS {
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case "plan9":
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t.Skipf("skipping test on %q", runtime.GOOS)
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}
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ln := newLocalListener(t).(*TCPListener)
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defer ln.Close()
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ln.SetDeadline(time.Now().Add(-1 * time.Second))
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if _, err := ln.Accept(); !isTimeout(err) {
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t.Fatalf("Accept: expected err %v, got %v", errTimeout, err)
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}
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if _, err := ln.Accept(); !isTimeout(err) {
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t.Fatalf("Accept: expected err %v, got %v", errTimeout, err)
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}
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ln.SetDeadline(time.Now().Add(100 * time.Millisecond))
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if _, err := ln.Accept(); !isTimeout(err) {
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t.Fatalf("Accept: expected err %v, got %v", errTimeout, err)
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}
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if _, err := ln.Accept(); !isTimeout(err) {
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t.Fatalf("Accept: expected err %v, got %v", errTimeout, err)
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}
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ln.SetDeadline(noDeadline)
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errc := make(chan error)
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go func() {
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_, err := ln.Accept()
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errc <- err
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}()
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time.Sleep(100 * time.Millisecond)
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select {
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case err := <-errc:
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t.Fatalf("Expected Accept() to not return, but it returned with %v\n", err)
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default:
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}
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ln.Close()
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switch nerr := <-errc; err := nerr.(type) {
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case *OpError:
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if err.Err != errClosing {
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t.Fatalf("Accept: expected err %v, got %v", errClosing, err)
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}
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default:
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if err != errClosing {
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t.Fatalf("Accept: expected err %v, got %v", errClosing, err)
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}
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}
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}
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func TestReadTimeout(t *testing.T) {
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switch runtime.GOOS {
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case "plan9":
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t.Skipf("skipping test on %q", runtime.GOOS)
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}
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ln := newLocalListener(t)
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defer ln.Close()
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c, err := DialTCP("tcp", nil, ln.Addr().(*TCPAddr))
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if err != nil {
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t.Fatalf("Connect: %v", err)
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}
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defer c.Close()
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c.SetDeadline(time.Now().Add(time.Hour))
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c.SetReadDeadline(time.Now().Add(-1 * time.Second))
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buf := make([]byte, 1)
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if _, err = c.Read(buf); !isTimeout(err) {
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t.Fatalf("Read: expected err %v, got %v", errTimeout, err)
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}
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if _, err = c.Read(buf); !isTimeout(err) {
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t.Fatalf("Read: expected err %v, got %v", errTimeout, err)
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}
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c.SetDeadline(time.Now().Add(100 * time.Millisecond))
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if _, err = c.Read(buf); !isTimeout(err) {
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t.Fatalf("Read: expected err %v, got %v", errTimeout, err)
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}
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if _, err = c.Read(buf); !isTimeout(err) {
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t.Fatalf("Read: expected err %v, got %v", errTimeout, err)
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}
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c.SetReadDeadline(noDeadline)
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c.SetWriteDeadline(time.Now().Add(-1 * time.Second))
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errc := make(chan error)
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go func() {
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_, err := c.Read(buf)
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errc <- err
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}()
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time.Sleep(100 * time.Millisecond)
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select {
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case err := <-errc:
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t.Fatalf("Expected Read() to not return, but it returned with %v\n", err)
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default:
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}
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c.Close()
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switch nerr := <-errc; err := nerr.(type) {
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case *OpError:
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if err.Err != errClosing {
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t.Fatalf("Read: expected err %v, got %v", errClosing, err)
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}
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default:
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if err != errClosing {
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t.Fatalf("Read: expected err %v, got %v", errClosing, err)
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}
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}
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}
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func TestWriteTimeout(t *testing.T) {
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switch runtime.GOOS {
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case "plan9":
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t.Skipf("skipping test on %q", runtime.GOOS)
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}
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ln := newLocalListener(t)
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defer ln.Close()
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c, err := DialTCP("tcp", nil, ln.Addr().(*TCPAddr))
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if err != nil {
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t.Fatalf("Connect: %v", err)
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}
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defer c.Close()
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c.SetDeadline(time.Now().Add(time.Hour))
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c.SetWriteDeadline(time.Now().Add(-1 * time.Second))
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buf := make([]byte, 4096)
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writeUntilTimeout := func() {
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for {
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_, err := c.Write(buf)
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if err != nil {
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if isTimeout(err) {
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return
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}
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t.Fatalf("Write: expected err %v, got %v", errTimeout, err)
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}
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}
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}
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writeUntilTimeout()
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c.SetDeadline(time.Now().Add(10 * time.Millisecond))
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writeUntilTimeout()
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writeUntilTimeout()
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c.SetWriteDeadline(noDeadline)
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c.SetReadDeadline(time.Now().Add(-1 * time.Second))
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errc := make(chan error)
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go func() {
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for {
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_, err := c.Write(buf)
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if err != nil {
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errc <- err
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}
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}
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}()
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time.Sleep(100 * time.Millisecond)
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select {
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case err := <-errc:
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t.Fatalf("Expected Write() to not return, but it returned with %v\n", err)
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default:
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}
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c.Close()
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switch nerr := <-errc; err := nerr.(type) {
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case *OpError:
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if err.Err != errClosing {
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t.Fatalf("Write: expected err %v, got %v", errClosing, err)
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}
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default:
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if err != errClosing {
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t.Fatalf("Write: expected err %v, got %v", errClosing, err)
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}
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}
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}
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func testTimeout(t *testing.T, net, addr string, readFrom bool) {
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c, err := Dial(net, addr)
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if err != nil {
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t.Errorf("Dial(%q, %q) failed: %v", net, addr, err)
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return
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}
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defer c.Close()
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what := "Read"
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if readFrom {
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what = "ReadFrom"
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}
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errc := make(chan error, 1)
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go func() {
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t0 := time.Now()
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c.SetReadDeadline(time.Now().Add(100 * time.Millisecond))
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var b [100]byte
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var n int
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var err error
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if readFrom {
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n, _, err = c.(PacketConn).ReadFrom(b[0:])
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} else {
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n, err = c.Read(b[0:])
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}
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t1 := time.Now()
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if n != 0 || err == nil || !err.(Error).Timeout() {
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errc <- fmt.Errorf("%s(%q, %q) did not return 0, timeout: %v, %v", what, net, addr, n, err)
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return
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}
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if dt := t1.Sub(t0); dt < 50*time.Millisecond || !testing.Short() && dt > 250*time.Millisecond {
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errc <- fmt.Errorf("%s(%q, %q) took %s, expected 0.1s", what, net, addr, dt)
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return
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}
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errc <- nil
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}()
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select {
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case err := <-errc:
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if err != nil {
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t.Error(err)
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}
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case <-time.After(1 * time.Second):
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t.Errorf("%s(%q, %q) took over 1 second, expected 0.1s", what, net, addr)
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}
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}
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func TestTimeoutUDP(t *testing.T) {
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switch runtime.GOOS {
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case "plan9":
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t.Skipf("skipping test on %q", runtime.GOOS)
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}
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// set up a listener that won't talk back
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listening := make(chan string)
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done := make(chan int)
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go runDatagramPacketConnServer(t, "udp", "127.0.0.1:0", listening, done)
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addr := <-listening
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testTimeout(t, "udp", addr, false)
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testTimeout(t, "udp", addr, true)
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<-done
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}
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func TestTimeoutTCP(t *testing.T) {
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switch runtime.GOOS {
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case "plan9":
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t.Skipf("skipping test on %q", runtime.GOOS)
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}
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// set up a listener that won't talk back
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listening := make(chan string)
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done := make(chan int)
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go runStreamConnServer(t, "tcp", "127.0.0.1:0", listening, done)
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addr := <-listening
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testTimeout(t, "tcp", addr, false)
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<-done
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}
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func TestDeadlineReset(t *testing.T) {
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switch runtime.GOOS {
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case "plan9":
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t.Skipf("skipping test on %q", runtime.GOOS)
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}
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ln, err := Listen("tcp", "127.0.0.1:0")
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if err != nil {
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t.Fatal(err)
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}
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defer ln.Close()
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tl := ln.(*TCPListener)
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tl.SetDeadline(time.Now().Add(1 * time.Minute))
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tl.SetDeadline(noDeadline) // reset it
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errc := make(chan error, 1)
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go func() {
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_, err := ln.Accept()
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errc <- err
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}()
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select {
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case <-time.After(50 * time.Millisecond):
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// Pass.
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case err := <-errc:
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// Accept should never return; we never
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// connected to it.
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t.Errorf("unexpected return from Accept; err=%v", err)
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}
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}
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func TestTimeoutAccept(t *testing.T) {
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switch runtime.GOOS {
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case "plan9":
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t.Skipf("skipping test on %q", runtime.GOOS)
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}
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ln, err := Listen("tcp", "127.0.0.1:0")
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if err != nil {
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t.Fatal(err)
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}
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defer ln.Close()
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tl := ln.(*TCPListener)
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tl.SetDeadline(time.Now().Add(100 * time.Millisecond))
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errc := make(chan error, 1)
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go func() {
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_, err := ln.Accept()
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errc <- err
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}()
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select {
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case <-time.After(1 * time.Second):
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// Accept shouldn't block indefinitely
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t.Errorf("Accept didn't return in an expected time")
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case <-errc:
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// Pass.
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}
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}
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func TestReadWriteDeadline(t *testing.T) {
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switch runtime.GOOS {
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case "plan9":
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t.Skipf("skipping test on %q", runtime.GOOS)
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}
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if !canCancelIO {
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t.Skip("skipping test on this system")
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}
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const (
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readTimeout = 50 * time.Millisecond
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writeTimeout = 250 * time.Millisecond
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)
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checkTimeout := func(command string, start time.Time, should time.Duration) {
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is := time.Now().Sub(start)
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d := is - should
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if d < -30*time.Millisecond || !testing.Short() && 150*time.Millisecond < d {
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t.Errorf("%s timeout test failed: is=%v should=%v\n", command, is, should)
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}
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}
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ln, err := Listen("tcp", "127.0.0.1:0")
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if err != nil {
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t.Fatalf("ListenTCP on :0: %v", err)
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}
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defer ln.Close()
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lnquit := make(chan bool)
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go func() {
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c, err := ln.Accept()
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if err != nil {
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t.Fatalf("Accept: %v", err)
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}
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defer c.Close()
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lnquit <- true
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}()
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c, err := Dial("tcp", ln.Addr().String())
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if err != nil {
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t.Fatalf("Dial: %v", err)
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}
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defer c.Close()
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start := time.Now()
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err = c.SetReadDeadline(start.Add(readTimeout))
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if err != nil {
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t.Fatalf("SetReadDeadline: %v", err)
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}
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err = c.SetWriteDeadline(start.Add(writeTimeout))
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if err != nil {
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t.Fatalf("SetWriteDeadline: %v", err)
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}
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quit := make(chan bool)
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go func() {
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var buf [10]byte
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_, err := c.Read(buf[:])
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if err == nil {
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t.Errorf("Read should not succeed")
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}
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checkTimeout("Read", start, readTimeout)
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quit <- true
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}()
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go func() {
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var buf [10000]byte
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for {
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_, err := c.Write(buf[:])
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if err != nil {
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break
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}
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}
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checkTimeout("Write", start, writeTimeout)
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quit <- true
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}()
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<-quit
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<-quit
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<-lnquit
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}
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type neverEnding byte
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func (b neverEnding) Read(p []byte) (n int, err error) {
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for i := range p {
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p[i] = byte(b)
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}
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return len(p), nil
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}
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func TestVariousDeadlines1Proc(t *testing.T) {
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testVariousDeadlines(t, 1)
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}
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func TestVariousDeadlines4Proc(t *testing.T) {
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testVariousDeadlines(t, 4)
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}
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func testVariousDeadlines(t *testing.T, maxProcs int) {
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switch runtime.GOOS {
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case "plan9":
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t.Skipf("skipping test on %q", runtime.GOOS)
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}
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defer runtime.GOMAXPROCS(runtime.GOMAXPROCS(maxProcs))
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ln := newLocalListener(t)
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defer ln.Close()
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acceptc := make(chan error, 1)
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// The server, with no timeouts of its own, sending bytes to clients
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// as fast as it can.
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servec := make(chan copyRes)
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go func() {
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for {
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c, err := ln.Accept()
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if err != nil {
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acceptc <- err
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return
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}
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go func() {
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t0 := time.Now()
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n, err := io.Copy(c, neverEnding('a'))
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d := time.Since(t0)
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c.Close()
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servec <- copyRes{n, err, d}
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}()
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}
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}()
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for _, timeout := range []time.Duration{
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1 * time.Nanosecond,
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2 * time.Nanosecond,
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5 * time.Nanosecond,
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50 * time.Nanosecond,
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100 * time.Nanosecond,
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200 * time.Nanosecond,
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500 * time.Nanosecond,
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750 * time.Nanosecond,
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1 * time.Microsecond,
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5 * time.Microsecond,
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25 * time.Microsecond,
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250 * time.Microsecond,
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500 * time.Microsecond,
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1 * time.Millisecond,
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5 * time.Millisecond,
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100 * time.Millisecond,
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250 * time.Millisecond,
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500 * time.Millisecond,
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1 * time.Second,
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} {
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numRuns := 3
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if testing.Short() {
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numRuns = 1
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if timeout > 500*time.Microsecond {
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continue
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}
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}
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for run := 0; run < numRuns; run++ {
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name := fmt.Sprintf("%v run %d/%d", timeout, run+1, numRuns)
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t.Log(name)
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c, err := Dial("tcp", ln.Addr().String())
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if err != nil {
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t.Fatalf("Dial: %v", err)
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}
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clientc := make(chan copyRes)
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go func() {
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t0 := time.Now()
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c.SetDeadline(t0.Add(timeout))
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n, err := io.Copy(ioutil.Discard, c)
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d := time.Since(t0)
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c.Close()
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clientc <- copyRes{n, err, d}
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}()
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const tooLong = 2000 * time.Millisecond
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select {
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case res := <-clientc:
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if isTimeout(res.err) {
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t.Logf("for %v, good client timeout after %v, reading %d bytes", name, res.d, res.n)
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} else {
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t.Fatalf("for %v: client Copy = %d, %v (want timeout)", name, res.n, res.err)
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}
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case <-time.After(tooLong):
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t.Fatalf("for %v: timeout (%v) waiting for client to timeout (%v) reading", name, tooLong, timeout)
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}
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select {
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case res := <-servec:
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t.Logf("for %v: server in %v wrote %d, %v", name, res.d, res.n, res.err)
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case err := <-acceptc:
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t.Fatalf("for %v: server Accept = %v", name, err)
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case <-time.After(tooLong):
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t.Fatalf("for %v, timeout waiting for server to finish writing", name)
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}
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}
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}
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}
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// TestReadDeadlineDataAvailable tests that read deadlines work, even
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// if there's data ready to be read.
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func TestReadDeadlineDataAvailable(t *testing.T) {
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switch runtime.GOOS {
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case "plan9":
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t.Skipf("skipping test on %q", runtime.GOOS)
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}
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ln := newLocalListener(t)
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defer ln.Close()
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servec := make(chan copyRes)
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const msg = "data client shouldn't read, even though it'll be waiting"
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go func() {
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c, err := ln.Accept()
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if err != nil {
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t.Fatalf("Accept: %v", err)
|
|
}
|
|
defer c.Close()
|
|
n, err := c.Write([]byte(msg))
|
|
servec <- copyRes{n: int64(n), err: err}
|
|
}()
|
|
|
|
c, err := Dial("tcp", ln.Addr().String())
|
|
if err != nil {
|
|
t.Fatalf("Dial: %v", err)
|
|
}
|
|
defer c.Close()
|
|
if res := <-servec; res.err != nil || res.n != int64(len(msg)) {
|
|
t.Fatalf("unexpected server Write: n=%d, err=%d; want n=%d, err=nil", res.n, res.err, len(msg))
|
|
}
|
|
c.SetReadDeadline(time.Now().Add(-5 * time.Second)) // in the psat.
|
|
buf := make([]byte, len(msg)/2)
|
|
n, err := c.Read(buf)
|
|
if n > 0 || !isTimeout(err) {
|
|
t.Fatalf("client read = %d (%q) err=%v; want 0, timeout", n, buf[:n], err)
|
|
}
|
|
}
|
|
|
|
// TestWriteDeadlineBufferAvailable tests that write deadlines work, even
|
|
// if there's buffer space available to write.
|
|
func TestWriteDeadlineBufferAvailable(t *testing.T) {
|
|
switch runtime.GOOS {
|
|
case "plan9":
|
|
t.Skipf("skipping test on %q", runtime.GOOS)
|
|
}
|
|
|
|
ln := newLocalListener(t)
|
|
defer ln.Close()
|
|
|
|
servec := make(chan copyRes)
|
|
go func() {
|
|
c, err := ln.Accept()
|
|
if err != nil {
|
|
t.Fatalf("Accept: %v", err)
|
|
}
|
|
defer c.Close()
|
|
c.SetWriteDeadline(time.Now().Add(-5 * time.Second)) // in the past
|
|
n, err := c.Write([]byte{'x'})
|
|
servec <- copyRes{n: int64(n), err: err}
|
|
}()
|
|
|
|
c, err := Dial("tcp", ln.Addr().String())
|
|
if err != nil {
|
|
t.Fatalf("Dial: %v", err)
|
|
}
|
|
defer c.Close()
|
|
res := <-servec
|
|
if res.n != 0 {
|
|
t.Errorf("Write = %d; want 0", res.n)
|
|
}
|
|
if !isTimeout(res.err) {
|
|
t.Errorf("Write error = %v; want timeout", res.err)
|
|
}
|
|
}
|
|
|
|
// TestAcceptDeadlineConnectionAvailable tests that accept deadlines work, even
|
|
// if there's incoming connections available.
|
|
func TestAcceptDeadlineConnectionAvailable(t *testing.T) {
|
|
switch runtime.GOOS {
|
|
case "plan9":
|
|
t.Skipf("skipping test on %q", runtime.GOOS)
|
|
}
|
|
|
|
ln := newLocalListener(t).(*TCPListener)
|
|
defer ln.Close()
|
|
|
|
go func() {
|
|
c, err := Dial("tcp", ln.Addr().String())
|
|
if err != nil {
|
|
t.Fatalf("Dial: %v", err)
|
|
}
|
|
defer c.Close()
|
|
var buf [1]byte
|
|
c.Read(buf[:]) // block until the connection or listener is closed
|
|
}()
|
|
time.Sleep(10 * time.Millisecond)
|
|
ln.SetDeadline(time.Now().Add(-5 * time.Second)) // in the past
|
|
c, err := ln.Accept()
|
|
if err == nil {
|
|
defer c.Close()
|
|
}
|
|
if !isTimeout(err) {
|
|
t.Fatalf("Accept: got %v; want timeout", err)
|
|
}
|
|
}
|
|
|
|
// TestConnectDeadlineInThePast tests that connect deadlines work, even
|
|
// if the connection can be established w/o blocking.
|
|
func TestConnectDeadlineInThePast(t *testing.T) {
|
|
switch runtime.GOOS {
|
|
case "plan9":
|
|
t.Skipf("skipping test on %q", runtime.GOOS)
|
|
}
|
|
|
|
ln := newLocalListener(t).(*TCPListener)
|
|
defer ln.Close()
|
|
|
|
go func() {
|
|
c, err := ln.Accept()
|
|
if err == nil {
|
|
defer c.Close()
|
|
}
|
|
}()
|
|
time.Sleep(10 * time.Millisecond)
|
|
c, err := DialTimeout("tcp", ln.Addr().String(), -5*time.Second) // in the past
|
|
if err == nil {
|
|
defer c.Close()
|
|
}
|
|
if !isTimeout(err) {
|
|
t.Fatalf("DialTimeout: got %v; want timeout", err)
|
|
}
|
|
}
|
|
|
|
// TestProlongTimeout tests concurrent deadline modification.
|
|
// Known to cause data races in the past.
|
|
func TestProlongTimeout(t *testing.T) {
|
|
switch runtime.GOOS {
|
|
case "plan9":
|
|
t.Skipf("skipping test on %q", runtime.GOOS)
|
|
}
|
|
|
|
ln := newLocalListener(t)
|
|
defer ln.Close()
|
|
connected := make(chan bool)
|
|
go func() {
|
|
s, err := ln.Accept()
|
|
connected <- true
|
|
if err != nil {
|
|
t.Fatalf("ln.Accept: %v", err)
|
|
}
|
|
defer s.Close()
|
|
s.SetDeadline(time.Now().Add(time.Hour))
|
|
go func() {
|
|
var buf [4096]byte
|
|
for {
|
|
_, err := s.Write(buf[:])
|
|
if err != nil {
|
|
break
|
|
}
|
|
s.SetDeadline(time.Now().Add(time.Hour))
|
|
}
|
|
}()
|
|
buf := make([]byte, 1)
|
|
for {
|
|
_, err := s.Read(buf)
|
|
if err != nil {
|
|
break
|
|
}
|
|
s.SetDeadline(time.Now().Add(time.Hour))
|
|
}
|
|
}()
|
|
c, err := Dial("tcp", ln.Addr().String())
|
|
if err != nil {
|
|
t.Fatalf("DialTCP: %v", err)
|
|
}
|
|
defer c.Close()
|
|
<-connected
|
|
for i := 0; i < 1024; i++ {
|
|
var buf [1]byte
|
|
c.Write(buf[:])
|
|
}
|
|
}
|