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package zk
import (
"context"
"fmt"
"io/ioutil"
"sync"
"testing"
"time"
)
func TestIntegration_RecurringReAuthHang(t *testing.T) {
zkC, err := StartTestCluster(t, 3, ioutil.Discard, ioutil.Discard)
if err != nil {
panic(err)
}
defer zkC.Stop()
conn, evtC, err := zkC.ConnectAll()
if err != nil {
panic(err)
}
defer conn.Close()
ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
defer cancel()
waitForSession(ctx, evtC)
// Add auth.
conn.AddAuth("digest", []byte("test:test"))
var reauthCloseOnce sync.Once
reauthSig := make(chan struct{}, 1)
conn.resendZkAuthFn = func(ctx context.Context, c *Conn) error {
// in current implimentation the reauth might be called more than once based on various conditions
reauthCloseOnce.Do(func() { close(reauthSig) })
return resendZkAuth(ctx, c)
}
conn.debugCloseRecvLoop = true
currentServer := conn.Server()
zkC.StopServer(currentServer)
// wait connect to new zookeeper.
ctx, cancel = context.WithTimeout(context.Background(), time.Second*5)
defer cancel()
waitForSession(ctx, evtC)
select {
case _, ok := <-reauthSig:
if !ok {
return // we closed the channel as expected
}
t.Fatal("reauth testing channel should have been closed")
case <-ctx.Done():
t.Fatal(ctx.Err())
}
}
func TestConcurrentReadAndClose(t *testing.T) {
WithListenServer(t, func(server string) {
conn, _, err := Connect([]string{server}, 15*time.Second)
if err != nil {
t.Fatalf("Failed to create Connection %s", err)
}
okChan := make(chan struct{})
var setErr error
go func() {
_, setErr = conn.Create("/test-path", []byte("test data"), 0, WorldACL(PermAll))
close(okChan)
}()
go func() {
time.Sleep(1 * time.Second)
conn.Close()
}()
select {
case <-okChan:
if setErr != ErrConnectionClosed {
t.Fatalf("unexpected error returned from Set %v", setErr)
}
case <-time.After(3 * time.Second):
t.Fatal("apparent deadlock!")
}
})
}
func TestDeadlockInClose(t *testing.T) {
c := &Conn{
shouldQuit: make(chan struct{}),
connectTimeout: 1 * time.Second,
sendChan: make(chan *request, sendChanSize),
logger: DefaultLogger,
}
for i := 0; i < sendChanSize; i++ {
c.sendChan <- &request{}
}
okChan := make(chan struct{})
go func() {
c.Close()
close(okChan)
}()
select {
case <-okChan:
case <-time.After(3 * time.Second):
t.Fatal("apparent deadlock!")
}
}
func TestNotifyWatches(t *testing.T) {
cases := []struct {
eType EventType
path string
watches map[watchPathType]bool
}{
{
EventNodeCreated, "/",
map[watchPathType]bool{
{"/", watchTypeExist}: true,
{"/", watchTypeChild}: false,
{"/", watchTypeData}: false,
},
},
{
EventNodeCreated, "/a",
map[watchPathType]bool{
{"/b", watchTypeExist}: false,
},
},
{
EventNodeDataChanged, "/",
map[watchPathType]bool{
{"/", watchTypeExist}: true,
{"/", watchTypeData}: true,
{"/", watchTypeChild}: false,
},
},
{
EventNodeChildrenChanged, "/",
map[watchPathType]bool{
{"/", watchTypeExist}: false,
{"/", watchTypeData}: false,
{"/", watchTypeChild}: true,
},
},
{
EventNodeDeleted, "/",
map[watchPathType]bool{
{"/", watchTypeExist}: true,
{"/", watchTypeData}: true,
{"/", watchTypeChild}: true,
},
},
}
conn := &Conn{watchers: make(map[watchPathType][]chan Event)}
for idx, c := range cases {
t.Run(fmt.Sprintf("#%d %s", idx, c.eType), func(t *testing.T) {
c := c
notifications := make([]struct {
path string
notify bool
ch <-chan Event
}, len(c.watches))
var idx int
for wpt, expectEvent := range c.watches {
ch := conn.addWatcher(wpt.path, wpt.wType)
notifications[idx].path = wpt.path
notifications[idx].notify = expectEvent
notifications[idx].ch = ch
idx++
}
ev := Event{Type: c.eType, Path: c.path}
conn.notifyWatches(ev)
for _, res := range notifications {
select {
case e := <-res.ch:
if !res.notify || e.Path != res.path {
t.Fatal("unexpeted notification received")
}
default:
if res.notify {
t.Fatal("expected notification not received")
}
}
}
})
}
}
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