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package queueing
import (
"testing"
"time"
"github.com/prometheus/client_golang/prometheus"
)
func TestNormalQueueing(t *testing.T) {
q := newQueue("queue name", 2, 1, time.Microsecond, prometheus.NewRegistry())
err1 := q.Acquire()
if err1 != nil {
t.Fatal("we should acquire a new slot")
}
err2 := q.Acquire()
if err2 != nil {
t.Fatal("we should acquire a new slot")
}
err3 := q.Acquire()
if err3 != ErrQueueingTimedout {
t.Fatal("we should timeout")
}
q.Release()
err4 := q.Acquire()
if err4 != nil {
t.Fatal("we should acquire a new slot")
}
}
func TestQueueLimit(t *testing.T) {
q := newQueue("queue name", 1, 0, time.Microsecond, prometheus.NewRegistry())
err1 := q.Acquire()
if err1 != nil {
t.Fatal("we should acquire a new slot")
}
err2 := q.Acquire()
if err2 != ErrTooManyRequests {
t.Fatal("we should fail because of not enough slots in queue")
}
}
func TestQueueProcessing(t *testing.T) {
q := newQueue("queue name", 1, 1, time.Second, prometheus.NewRegistry())
err1 := q.Acquire()
if err1 != nil {
t.Fatal("we should acquire a new slot")
}
go func() {
time.Sleep(50 * time.Microsecond)
q.Release()
}()
err2 := q.Acquire()
if err2 != nil {
t.Fatal("we should acquire slot after the previous one finished")
}
}
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