2015-07-06 17:54:22 -07:00
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// Copyright 2014 The go-ethereum Authors
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// This file is part of go-ethereum.
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//
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// go-ethereum is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// go-ethereum is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
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2014-10-23 08:57:54 -07:00
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package p2p
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import (
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"bytes"
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"encoding/hex"
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"fmt"
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2015-02-04 18:07:58 -08:00
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"io"
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"runtime"
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"strings"
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"testing"
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"time"
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)
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2014-12-12 02:39:07 -08:00
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func ExampleMsgPipe() {
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rw1, rw2 := MsgPipe()
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go func() {
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Send(rw1, 8, [][]byte{{0, 0}})
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Send(rw1, 5, [][]byte{{1, 1}})
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rw1.Close()
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}()
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for {
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msg, err := rw2.ReadMsg()
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if err != nil {
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break
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}
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var data [][]byte
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msg.Decode(&data)
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fmt.Printf("msg: %d, %x\n", msg.Code, data[0])
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}
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// Output:
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// msg: 8, 0000
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// msg: 5, 0101
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}
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func TestMsgPipeUnblockWrite(t *testing.T) {
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loop:
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for i := 0; i < 100; i++ {
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rw1, rw2 := MsgPipe()
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done := make(chan struct{})
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go func() {
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if err := SendItems(rw1, 1); err == nil {
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t.Error("EncodeMsg returned nil error")
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} else if err != ErrPipeClosed {
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t.Error("EncodeMsg returned wrong error: got %v, want %v", err, ErrPipeClosed)
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}
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close(done)
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}()
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// this call should ensure that EncodeMsg is waiting to
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// deliver sometimes. if this isn't done, Close is likely to
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// be executed before EncodeMsg starts and then we won't test
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// all the cases.
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runtime.Gosched()
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rw2.Close()
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select {
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case <-done:
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case <-time.After(200 * time.Millisecond):
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t.Errorf("write didn't unblock")
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break loop
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}
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}
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}
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// This test should panic if concurrent close isn't implemented correctly.
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func TestMsgPipeConcurrentClose(t *testing.T) {
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rw1, _ := MsgPipe()
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for i := 0; i < 10; i++ {
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go rw1.Close()
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}
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}
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func TestEOFSignal(t *testing.T) {
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rb := make([]byte, 10)
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// empty reader
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eof := make(chan struct{}, 1)
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sig := &eofSignal{new(bytes.Buffer), 0, eof}
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if n, err := sig.Read(rb); n != 0 || err != io.EOF {
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t.Errorf("Read returned unexpected values: (%v, %v)", n, err)
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}
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select {
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case <-eof:
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default:
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t.Error("EOF chan not signaled")
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}
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// count before error
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eof = make(chan struct{}, 1)
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sig = &eofSignal{bytes.NewBufferString("aaaaaaaa"), 4, eof}
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if n, err := sig.Read(rb); n != 4 || err != nil {
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t.Errorf("Read returned unexpected values: (%v, %v)", n, err)
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}
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select {
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case <-eof:
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default:
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t.Error("EOF chan not signaled")
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}
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// error before count
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eof = make(chan struct{}, 1)
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sig = &eofSignal{bytes.NewBufferString("aaaa"), 999, eof}
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if n, err := sig.Read(rb); n != 4 || err != nil {
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t.Errorf("Read returned unexpected values: (%v, %v)", n, err)
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}
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if n, err := sig.Read(rb); n != 0 || err != io.EOF {
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t.Errorf("Read returned unexpected values: (%v, %v)", n, err)
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}
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select {
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case <-eof:
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default:
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t.Error("EOF chan not signaled")
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}
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// no signal if neither occurs
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eof = make(chan struct{}, 1)
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sig = &eofSignal{bytes.NewBufferString("aaaaaaaaaaaaaaaaaaaaa"), 999, eof}
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if n, err := sig.Read(rb); n != 10 || err != nil {
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t.Errorf("Read returned unexpected values: (%v, %v)", n, err)
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}
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select {
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case <-eof:
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t.Error("unexpected EOF signal")
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default:
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}
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}
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2015-03-04 03:03:43 -08:00
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func unhex(str string) []byte {
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b, err := hex.DecodeString(strings.Replace(str, "\n", "", -1))
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if err != nil {
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panic(fmt.Sprintf("invalid hex string: %q", str))
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}
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return b
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}
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