/
semaphore_test.go
58 lines (48 loc) · 943 Bytes
/
semaphore_test.go
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package semaphore_test
import (
"testing"
"time"
"github.com/f2prateek/semaphore"
)
func TestSemaphoreAcquires(t *testing.T) {
s := semaphore.New(1)
acquired := make(chan struct{})
go func() {
s.Acquire(1)
acquired <- struct{}{}
}()
select {
case <-acquired:
case <-time.After(1 * time.Second):
t.Errorf("semaphore not acquired")
}
}
func TestSemaphoreDoesNotAcquireAtCapacity(t *testing.T) {
s := semaphore.New(2)
s.Acquire(2)
acquired := make(chan struct{})
go func() {
s.Acquire(1)
acquired <- struct{}{}
}()
select {
case <-acquired:
t.Errorf("semaphore acquired")
case <-time.After(1 * time.Second):
}
}
func TestSemaphoreReleases(t *testing.T) {
s := semaphore.New(2)
s.Acquire(2)
acquired := make(chan struct{})
go func() {
s.Acquire(1)
acquired <- struct{}{}
}()
s.Release(1)
select {
case <-acquired:
case <-time.After(1 * time.Second):
t.Errorf("semaphore not acquired")
}
}