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https://github.com/etcd-io/etcd.git
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deb1da5f57
One watcher includes multiple watchings, and their events are sent out through one channel. For the received event, user would like to know which watching it belongs to. Introduce a watch ID. When watching on some key, user will get a watch ID. The watch ID is attached to all events that is observed by this watch.
98 lines
2.3 KiB
Go
98 lines
2.3 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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"os"
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"testing"
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)
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func TestWatch(t *testing.T) {
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s := newWatchableStore(tmpPath)
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defer func() {
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s.store.Close()
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os.Remove(tmpPath)
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}()
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testKey := []byte("foo")
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testValue := []byte("bar")
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s.Put(testKey, testValue)
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w := s.NewWatcher()
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w.Watch(testKey, true, 0)
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if _, ok := s.synced[string(testKey)]; !ok {
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// the key must have had an entry in synced
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t.Errorf("existence = %v, want true", ok)
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}
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}
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func TestNewWatcherCancel(t *testing.T) {
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s := newWatchableStore(tmpPath)
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defer func() {
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s.store.Close()
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os.Remove(tmpPath)
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}()
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testKey := []byte("foo")
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testValue := []byte("bar")
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s.Put(testKey, testValue)
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w := s.NewWatcher()
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_, cancel := w.Watch(testKey, true, 0)
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cancel()
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if _, ok := s.synced[string(testKey)]; ok {
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// the key shoud have been deleted
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t.Errorf("existence = %v, want false", ok)
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}
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}
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func TestUnsafeAddWatching(t *testing.T) {
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s := newWatchableStore(tmpPath)
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defer func() {
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s.store.Close()
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os.Remove(tmpPath)
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}()
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testKey := []byte("foo")
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testValue := []byte("bar")
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s.Put(testKey, testValue)
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wa := &watching{
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key: testKey,
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prefix: true,
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cur: 0,
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}
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if err := unsafeAddWatching(&s.synced, string(testKey), wa); err != nil {
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t.Error(err)
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}
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if v, ok := s.synced[string(testKey)]; !ok {
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// the key must have had entry in synced
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t.Errorf("existence = %v, want true", ok)
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} else {
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if len(v) != 1 {
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// the key must have ONE entry in its watching map
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t.Errorf("len(v) = %d, want 1", len(v))
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}
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}
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if err := unsafeAddWatching(&s.synced, string(testKey), wa); err == nil {
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// unsafeAddWatching should have returned error
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// when putting the same watch twice"
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t.Error(`error = nil, want "put the same watch twice"`)
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}
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}
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