188 lines
4.8 KiB
Go
188 lines
4.8 KiB
Go
// Copyright 2015 CoreOS, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package storage
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import (
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"bytes"
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"testing"
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"github.com/coreos/etcd/lease"
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"github.com/coreos/etcd/storage/backend"
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)
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// TestWatcherWatchID tests that each watcher provides unique watchID,
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// and the watched event attaches the correct watchID.
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func TestWatcherWatchID(t *testing.T) {
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b, tmpPath := backend.NewDefaultTmpBackend()
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s := WatchableKV(newWatchableStore(b, &lease.FakeLessor{}))
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defer cleanup(s, b, tmpPath)
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w := s.NewWatchStream()
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defer w.Close()
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idm := make(map[WatchID]struct{})
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for i := 0; i < 10; i++ {
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id := w.Watch([]byte("foo"), false, 0)
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if _, ok := idm[id]; ok {
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t.Errorf("#%d: id %d exists", i, id)
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}
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idm[id] = struct{}{}
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s.Put([]byte("foo"), []byte("bar"), lease.NoLease)
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resp := <-w.Chan()
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if resp.WatchID != id {
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t.Errorf("#%d: watch id in event = %d, want %d", i, resp.WatchID, id)
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}
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if err := w.Cancel(id); err != nil {
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t.Error(err)
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}
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}
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s.Put([]byte("foo2"), []byte("bar"), lease.NoLease)
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// unsynced watchers
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for i := 10; i < 20; i++ {
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id := w.Watch([]byte("foo2"), false, 1)
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if _, ok := idm[id]; ok {
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t.Errorf("#%d: id %d exists", i, id)
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}
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idm[id] = struct{}{}
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resp := <-w.Chan()
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if resp.WatchID != id {
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t.Errorf("#%d: watch id in event = %d, want %d", i, resp.WatchID, id)
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}
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if err := w.Cancel(id); err != nil {
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t.Error(err)
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}
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}
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}
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// TestWatcherWatchPrefix tests if Watch operation correctly watches
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// and returns events with matching prefixes.
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func TestWatcherWatchPrefix(t *testing.T) {
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b, tmpPath := backend.NewDefaultTmpBackend()
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s := WatchableKV(newWatchableStore(b, &lease.FakeLessor{}))
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defer cleanup(s, b, tmpPath)
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w := s.NewWatchStream()
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defer w.Close()
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idm := make(map[WatchID]struct{})
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prefixMatch := true
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val := []byte("bar")
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keyWatch, keyPut := []byte("foo"), []byte("foobar")
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for i := 0; i < 10; i++ {
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id := w.Watch(keyWatch, prefixMatch, 0)
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if _, ok := idm[id]; ok {
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t.Errorf("#%d: unexpected duplicated id %x", i, id)
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}
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idm[id] = struct{}{}
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s.Put(keyPut, val, lease.NoLease)
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resp := <-w.Chan()
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if resp.WatchID != id {
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t.Errorf("#%d: watch id in event = %d, want %d", i, resp.WatchID, id)
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}
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if err := w.Cancel(id); err != nil {
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t.Errorf("#%d: unexpected cancel error %v", i, err)
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}
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if len(resp.Events) != 1 {
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t.Errorf("#%d: len(resp.Events) got = %d, want = 1", i, len(resp.Events))
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}
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if len(resp.Events) == 1 {
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if !bytes.Equal(resp.Events[0].Kv.Key, keyPut) {
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t.Errorf("#%d: resp.Events got = %s, want = %s", i, resp.Events[0].Kv.Key, keyPut)
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}
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}
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}
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keyWatch1, keyPut1 := []byte("foo1"), []byte("foo1bar")
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s.Put(keyPut1, val, lease.NoLease)
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// unsynced watchers
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for i := 10; i < 15; i++ {
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id := w.Watch(keyWatch1, prefixMatch, 1)
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if _, ok := idm[id]; ok {
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t.Errorf("#%d: id %d exists", i, id)
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}
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idm[id] = struct{}{}
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resp := <-w.Chan()
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if resp.WatchID != id {
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t.Errorf("#%d: watch id in event = %d, want %d", i, resp.WatchID, id)
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}
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if err := w.Cancel(id); err != nil {
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t.Error(err)
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}
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if len(resp.Events) != 1 {
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t.Errorf("#%d: len(resp.Events) got = %d, want = 1", i, len(resp.Events))
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}
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if len(resp.Events) == 1 {
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if !bytes.Equal(resp.Events[0].Kv.Key, keyPut1) {
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t.Errorf("#%d: resp.Events got = %s, want = %s", i, resp.Events[0].Kv.Key, keyPut1)
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}
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}
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}
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}
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// TestWatchStreamCancelWatcherByID ensures cancel calls the cancel func of the watcher
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// with given id inside watchStream.
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func TestWatchStreamCancelWatcherByID(t *testing.T) {
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b, tmpPath := backend.NewDefaultTmpBackend()
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s := WatchableKV(newWatchableStore(b, &lease.FakeLessor{}))
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defer cleanup(s, b, tmpPath)
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w := s.NewWatchStream()
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defer w.Close()
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id := w.Watch([]byte("foo"), false, 0)
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tests := []struct {
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cancelID WatchID
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werr error
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}{
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// no error should be returned when cancel the created watcher.
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{id, nil},
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// not exist error should be returned when cancel again.
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{id, ErrWatcherNotExist},
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// not exist error should be returned when cancel a bad id.
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{id + 1, ErrWatcherNotExist},
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}
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for i, tt := range tests {
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gerr := w.Cancel(tt.cancelID)
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if gerr != tt.werr {
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t.Errorf("#%d: err = %v, want %v", i, gerr, tt.werr)
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}
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}
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if l := len(w.(*watchStream).cancels); l != 0 {
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t.Errorf("cancels = %d, want 0", l)
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}
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}
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