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watcher_test.go
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watcher_test.go
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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
package biglog
import (
"sync/atomic"
"testing"
"time"
)
func TestNewWatcher(t *testing.T) {
bl := tempBigLog()
var events int32
var closed int32
wa := NewWatcher(bl)
go func() {
for range wa.Watch() {
atomic.AddInt32(&events, 1)
}
atomic.AddInt32(&closed, 1)
}()
time.Sleep(time.Millisecond)
_, err := bl.Write([]byte("first"))
if err != nil {
t.Error(err)
}
time.Sleep(time.Millisecond)
_, err = bl.Write([]byte("second"))
if err != nil {
t.Error(err)
}
time.Sleep(time.Millisecond)
if atomic.LoadInt32(&events) != 2 {
t.Errorf("Watcher detected %d events instead of %d", atomic.LoadInt32(&events), 2)
}
err = wa.Close()
if err != nil {
t.Error(err)
}
time.Sleep(time.Millisecond)
if atomic.LoadInt32(&closed) != 1 {
t.Error("Watcher not closed correctly")
}
}
func TestWatcherCount(t *testing.T) {
bl := tempBigLog()
defer logDelete(bl, true)
var n = 10
var nw = make([]*Watcher, n)
for i := 0; i < n; i++ {
nw[i] = NewWatcher(bl)
count := len(bl.watchers.Load().(watcherMap))
if count != i+1 {
t.Errorf("Watcher map count error. Expected %d Actual %d", i+1, count)
}
}
for i := 0; i < n; i++ {
err := nw[i].Close()
if err != nil {
t.Error(err)
}
count := len(bl.watchers.Load().(watcherMap))
if count != 9-i {
t.Errorf("Watcher map count error. Expected %d Actual %d", 9-i, count)
}
}
}