mirror of
https://github.com/genuinetools/reg.git
synced 2024-08-23 06:50:23 -04:00
68 lines
1.2 KiB
Go
68 lines
1.2 KiB
Go
![]() |
package base
|
||
|
|
||
|
import (
|
||
|
"sync"
|
||
|
"testing"
|
||
|
"time"
|
||
|
)
|
||
|
|
||
|
func TestRegulatorEnterExit(t *testing.T) {
|
||
|
const limit = 500
|
||
|
|
||
|
r := NewRegulator(nil, limit).(*regulator)
|
||
|
|
||
|
for try := 0; try < 50; try++ {
|
||
|
run := make(chan struct{})
|
||
|
|
||
|
var firstGroupReady sync.WaitGroup
|
||
|
var firstGroupDone sync.WaitGroup
|
||
|
firstGroupReady.Add(limit)
|
||
|
firstGroupDone.Add(limit)
|
||
|
for i := 0; i < limit; i++ {
|
||
|
go func() {
|
||
|
r.enter()
|
||
|
firstGroupReady.Done()
|
||
|
<-run
|
||
|
r.exit()
|
||
|
firstGroupDone.Done()
|
||
|
}()
|
||
|
}
|
||
|
firstGroupReady.Wait()
|
||
|
|
||
|
// now we exhausted all the limit, let's run a little bit more
|
||
|
var secondGroupReady sync.WaitGroup
|
||
|
var secondGroupDone sync.WaitGroup
|
||
|
for i := 0; i < 50; i++ {
|
||
|
secondGroupReady.Add(1)
|
||
|
secondGroupDone.Add(1)
|
||
|
go func() {
|
||
|
secondGroupReady.Done()
|
||
|
r.enter()
|
||
|
r.exit()
|
||
|
secondGroupDone.Done()
|
||
|
}()
|
||
|
}
|
||
|
secondGroupReady.Wait()
|
||
|
|
||
|
// allow the first group to return resources
|
||
|
close(run)
|
||
|
|
||
|
done := make(chan struct{})
|
||
|
go func() {
|
||
|
secondGroupDone.Wait()
|
||
|
close(done)
|
||
|
}()
|
||
|
select {
|
||
|
case <-done:
|
||
|
case <-time.After(5 * time.Second):
|
||
|
t.Fatal("some r.enter() are still locked")
|
||
|
}
|
||
|
|
||
|
firstGroupDone.Wait()
|
||
|
|
||
|
if r.available != limit {
|
||
|
t.Fatalf("r.available: got %d, want %d", r.available, limit)
|
||
|
}
|
||
|
}
|
||
|
}
|