swh:1:snp:272e298efac7922bc58929ef447c6a9add2959f8
Tip revision: 8a37349097a592db79ba3087f3cae9cd4b0af21c authored by Gyu-Ho Lee on 04 November 2016, 17:54:14 UTC
version: bump to v3.0.14
version: bump to v3.0.14
Tip revision: 8a37349
watcher_test.go
// Copyright 2015 The etcd Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package mvcc
import (
"bytes"
"fmt"
"os"
"reflect"
"testing"
"time"
"github.com/coreos/etcd/lease"
"github.com/coreos/etcd/mvcc/backend"
"github.com/coreos/etcd/mvcc/mvccpb"
)
// TestWatcherWatchID tests that each watcher provides unique watchID,
// and the watched event attaches the correct watchID.
func TestWatcherWatchID(t *testing.T) {
b, tmpPath := backend.NewDefaultTmpBackend()
s := WatchableKV(newWatchableStore(b, &lease.FakeLessor{}, nil))
defer cleanup(s, b, tmpPath)
w := s.NewWatchStream()
defer w.Close()
idm := make(map[WatchID]struct{})
for i := 0; i < 10; i++ {
id := w.Watch([]byte("foo"), nil, 0)
if _, ok := idm[id]; ok {
t.Errorf("#%d: id %d exists", i, id)
}
idm[id] = struct{}{}
s.Put([]byte("foo"), []byte("bar"), lease.NoLease)
resp := <-w.Chan()
if resp.WatchID != id {
t.Errorf("#%d: watch id in event = %d, want %d", i, resp.WatchID, id)
}
if err := w.Cancel(id); err != nil {
t.Error(err)
}
}
s.Put([]byte("foo2"), []byte("bar"), lease.NoLease)
// unsynced watchers
for i := 10; i < 20; i++ {
id := w.Watch([]byte("foo2"), nil, 1)
if _, ok := idm[id]; ok {
t.Errorf("#%d: id %d exists", i, id)
}
idm[id] = struct{}{}
resp := <-w.Chan()
if resp.WatchID != id {
t.Errorf("#%d: watch id in event = %d, want %d", i, resp.WatchID, id)
}
if err := w.Cancel(id); err != nil {
t.Error(err)
}
}
}
// TestWatcherWatchPrefix tests if Watch operation correctly watches
// and returns events with matching prefixes.
func TestWatcherWatchPrefix(t *testing.T) {
b, tmpPath := backend.NewDefaultTmpBackend()
s := WatchableKV(newWatchableStore(b, &lease.FakeLessor{}, nil))
defer cleanup(s, b, tmpPath)
w := s.NewWatchStream()
defer w.Close()
idm := make(map[WatchID]struct{})
val := []byte("bar")
keyWatch, keyEnd, keyPut := []byte("foo"), []byte("fop"), []byte("foobar")
for i := 0; i < 10; i++ {
id := w.Watch(keyWatch, keyEnd, 0)
if _, ok := idm[id]; ok {
t.Errorf("#%d: unexpected duplicated id %x", i, id)
}
idm[id] = struct{}{}
s.Put(keyPut, val, lease.NoLease)
resp := <-w.Chan()
if resp.WatchID != id {
t.Errorf("#%d: watch id in event = %d, want %d", i, resp.WatchID, id)
}
if err := w.Cancel(id); err != nil {
t.Errorf("#%d: unexpected cancel error %v", i, err)
}
if len(resp.Events) != 1 {
t.Errorf("#%d: len(resp.Events) got = %d, want = 1", i, len(resp.Events))
}
if len(resp.Events) == 1 {
if !bytes.Equal(resp.Events[0].Kv.Key, keyPut) {
t.Errorf("#%d: resp.Events got = %s, want = %s", i, resp.Events[0].Kv.Key, keyPut)
}
}
}
keyWatch1, keyEnd1, keyPut1 := []byte("foo1"), []byte("foo2"), []byte("foo1bar")
s.Put(keyPut1, val, lease.NoLease)
// unsynced watchers
for i := 10; i < 15; i++ {
id := w.Watch(keyWatch1, keyEnd1, 1)
if _, ok := idm[id]; ok {
t.Errorf("#%d: id %d exists", i, id)
}
idm[id] = struct{}{}
resp := <-w.Chan()
if resp.WatchID != id {
t.Errorf("#%d: watch id in event = %d, want %d", i, resp.WatchID, id)
}
if err := w.Cancel(id); err != nil {
t.Error(err)
}
if len(resp.Events) != 1 {
t.Errorf("#%d: len(resp.Events) got = %d, want = 1", i, len(resp.Events))
}
if len(resp.Events) == 1 {
if !bytes.Equal(resp.Events[0].Kv.Key, keyPut1) {
t.Errorf("#%d: resp.Events got = %s, want = %s", i, resp.Events[0].Kv.Key, keyPut1)
}
}
}
}
func TestWatchDeleteRange(t *testing.T) {
b, tmpPath := backend.NewDefaultTmpBackend()
s := newWatchableStore(b, &lease.FakeLessor{}, nil)
defer func() {
s.store.Close()
os.Remove(tmpPath)
}()
testKeyPrefix := []byte("foo")
for i := 0; i < 3; i++ {
s.Put([]byte(fmt.Sprintf("%s_%d", testKeyPrefix, i)), []byte("bar"), lease.NoLease)
}
w := s.NewWatchStream()
from, to := []byte(testKeyPrefix), []byte(fmt.Sprintf("%s_%d", testKeyPrefix, 99))
w.Watch(from, to, 0)
s.DeleteRange(from, to)
we := []mvccpb.Event{
{Type: mvccpb.DELETE, Kv: &mvccpb.KeyValue{Key: []byte("foo_0"), ModRevision: 5}},
{Type: mvccpb.DELETE, Kv: &mvccpb.KeyValue{Key: []byte("foo_1"), ModRevision: 5}},
{Type: mvccpb.DELETE, Kv: &mvccpb.KeyValue{Key: []byte("foo_2"), ModRevision: 5}},
}
select {
case r := <-w.Chan():
if !reflect.DeepEqual(r.Events, we) {
t.Errorf("event = %v, want %v", r.Events, we)
}
case <-time.After(10 * time.Second):
t.Fatal("failed to receive event after 10 seconds!")
}
}
// TestWatchStreamCancelWatcherByID ensures cancel calls the cancel func of the watcher
// with given id inside watchStream.
func TestWatchStreamCancelWatcherByID(t *testing.T) {
b, tmpPath := backend.NewDefaultTmpBackend()
s := WatchableKV(newWatchableStore(b, &lease.FakeLessor{}, nil))
defer cleanup(s, b, tmpPath)
w := s.NewWatchStream()
defer w.Close()
id := w.Watch([]byte("foo"), nil, 0)
tests := []struct {
cancelID WatchID
werr error
}{
// no error should be returned when cancel the created watcher.
{id, nil},
// not exist error should be returned when cancel again.
{id, ErrWatcherNotExist},
// not exist error should be returned when cancel a bad id.
{id + 1, ErrWatcherNotExist},
}
for i, tt := range tests {
gerr := w.Cancel(tt.cancelID)
if gerr != tt.werr {
t.Errorf("#%d: err = %v, want %v", i, gerr, tt.werr)
}
}
if l := len(w.(*watchStream).cancels); l != 0 {
t.Errorf("cancels = %d, want 0", l)
}
}
// TestWatcherRequestProgress ensures synced watcher can correctly
// report its correct progress.
func TestWatcherRequestProgress(t *testing.T) {
b, tmpPath := backend.NewDefaultTmpBackend()
// manually create watchableStore instead of newWatchableStore
// because newWatchableStore automatically calls syncWatchers
// method to sync watchers in unsynced map. We want to keep watchers
// in unsynced to test if syncWatchers works as expected.
s := &watchableStore{
store: NewStore(b, &lease.FakeLessor{}, nil),
unsynced: newWatcherGroup(),
synced: newWatcherGroup(),
}
defer func() {
s.store.Close()
os.Remove(tmpPath)
}()
testKey := []byte("foo")
notTestKey := []byte("bad")
testValue := []byte("bar")
s.Put(testKey, testValue, lease.NoLease)
w := s.NewWatchStream()
badID := WatchID(1000)
w.RequestProgress(badID)
select {
case resp := <-w.Chan():
t.Fatalf("unexpected %+v", resp)
default:
}
id := w.Watch(notTestKey, nil, 1)
w.RequestProgress(id)
select {
case resp := <-w.Chan():
t.Fatalf("unexpected %+v", resp)
default:
}
s.syncWatchers()
w.RequestProgress(id)
wrs := WatchResponse{WatchID: 0, Revision: 2}
select {
case resp := <-w.Chan():
if !reflect.DeepEqual(resp, wrs) {
t.Fatalf("got %+v, expect %+v", resp, wrs)
}
case <-time.After(time.Second):
t.Fatal("failed to receive progress")
}
}