restic/vendor/github.com/pkg/sftp/packet-manager_test.go

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2017-07-23 12:24:45 +00:00
package sftp
import (
"encoding"
"fmt"
"sync"
"testing"
"time"
"github.com/stretchr/testify/assert"
)
type _testSender struct {
sent chan encoding.BinaryMarshaler
}
func newTestSender() *_testSender {
return &_testSender{make(chan encoding.BinaryMarshaler)}
}
func (s _testSender) sendPacket(p encoding.BinaryMarshaler) error {
s.sent <- p
return nil
}
type fakepacket uint32
func (fakepacket) MarshalBinary() ([]byte, error) {
return []byte{}, nil
}
func (fakepacket) UnmarshalBinary([]byte) error {
return nil
}
func (f fakepacket) id() uint32 {
return uint32(f)
}
type pair struct {
in fakepacket
out fakepacket
}
// basic test
var ttable1 = []pair{
pair{fakepacket(0), fakepacket(0)},
pair{fakepacket(1), fakepacket(1)},
pair{fakepacket(2), fakepacket(2)},
pair{fakepacket(3), fakepacket(3)},
}
// outgoing packets out of order
var ttable2 = []pair{
pair{fakepacket(0), fakepacket(0)},
pair{fakepacket(1), fakepacket(4)},
pair{fakepacket(2), fakepacket(1)},
pair{fakepacket(3), fakepacket(3)},
pair{fakepacket(4), fakepacket(2)},
}
// incoming packets out of order
var ttable3 = []pair{
pair{fakepacket(2), fakepacket(0)},
pair{fakepacket(1), fakepacket(1)},
pair{fakepacket(3), fakepacket(2)},
pair{fakepacket(0), fakepacket(3)},
}
var tables = [][]pair{ttable1, ttable2, ttable3}
func TestPacketManager(t *testing.T) {
sender := newTestSender()
s := newPktMgr(sender)
for i := range tables {
table := tables[i]
for _, p := range table {
s.incomingPacket(p.in)
}
for _, p := range table {
s.readyPacket(p.out)
}
for i := 0; i < len(table); i++ {
pkt := <-sender.sent
id := pkt.(fakepacket).id()
assert.Equal(t, id, uint32(i))
}
}
s.close()
}
func (p sshFxpRemovePacket) String() string {
return fmt.Sprintf("RmPct:%d", p.ID)
}
func (p sshFxpOpenPacket) String() string {
return fmt.Sprintf("OpPct:%d", p.ID)
}
func (p sshFxpWritePacket) String() string {
return fmt.Sprintf("WrPct:%d", p.ID)
}
func (p sshFxpClosePacket) String() string {
return fmt.Sprintf("ClPct:%d", p.ID)
}
// Test what happens when the pool processes a close packet on a file that it
// is still reading from.
func TestCloseOutOfOrder(t *testing.T) {
packets := []requestPacket{
&sshFxpRemovePacket{ID: 0, Filename: "foo"},
&sshFxpOpenPacket{ID: 1},
&sshFxpWritePacket{ID: 2, Handle: "foo"},
&sshFxpWritePacket{ID: 3, Handle: "foo"},
&sshFxpWritePacket{ID: 4, Handle: "foo"},
&sshFxpWritePacket{ID: 5, Handle: "foo"},
&sshFxpClosePacket{ID: 6, Handle: "foo"},
&sshFxpRemovePacket{ID: 7, Filename: "foo"},
}
recvChan := make(chan requestPacket, len(packets)+1)
sender := newTestSender()
pktMgr := newPktMgr(sender)
wg := sync.WaitGroup{}
wg.Add(len(packets))
runWorker := func(ch requestChan) {
go func() {
for pkt := range ch {
if _, ok := pkt.(*sshFxpWritePacket); ok {
// sleep to cause writes to come after close/remove
time.Sleep(time.Millisecond)
}
pktMgr.working.Done()
recvChan <- pkt
wg.Done()
}
}()
}
pktChan := pktMgr.workerChan(runWorker)
for _, p := range packets {
pktChan <- p
}
wg.Wait()
close(recvChan)
received := []requestPacket{}
for p := range recvChan {
received = append(received, p)
}
if received[len(received)-2].id() != packets[len(packets)-2].id() {
t.Fatal("Packets processed out of order1:", received, packets)
}
if received[len(received)-1].id() != packets[len(packets)-1].id() {
t.Fatal("Packets processed out of order2:", received, packets)
}
}