1/* 2Copyright 2016 The Kubernetes Authors. 3 4Licensed under the Apache License, Version 2.0 (the "License"); 5you may not use this file except in compliance with the License. 6You may obtain a copy of the License at 7 8 http://www.apache.org/licenses/LICENSE-2.0 9 10Unless required by applicable law or agreed to in writing, software 11distributed under the License is distributed on an "AS IS" BASIS, 12WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13See the License for the specific language governing permissions and 14limitations under the License. 15*/ 16 17package workqueue 18 19import ( 20 "testing" 21 "time" 22 23 "k8s.io/apimachinery/pkg/util/clock" 24) 25 26func TestRateLimitingQueue(t *testing.T) { 27 limiter := NewItemExponentialFailureRateLimiter(1*time.Millisecond, 1*time.Second) 28 queue := NewRateLimitingQueue(limiter).(*rateLimitingType) 29 fakeClock := clock.NewFakeClock(time.Now()) 30 delayingQueue := &delayingType{ 31 Interface: New(), 32 clock: fakeClock, 33 heartbeat: fakeClock.NewTicker(maxWait), 34 stopCh: make(chan struct{}), 35 waitingForAddCh: make(chan *waitFor, 1000), 36 metrics: newRetryMetrics(""), 37 } 38 queue.DelayingInterface = delayingQueue 39 40 queue.AddRateLimited("one") 41 waitEntry := <-delayingQueue.waitingForAddCh 42 if e, a := 1*time.Millisecond, waitEntry.readyAt.Sub(fakeClock.Now()); e != a { 43 t.Errorf("expected %v, got %v", e, a) 44 } 45 queue.AddRateLimited("one") 46 waitEntry = <-delayingQueue.waitingForAddCh 47 if e, a := 2*time.Millisecond, waitEntry.readyAt.Sub(fakeClock.Now()); e != a { 48 t.Errorf("expected %v, got %v", e, a) 49 } 50 if e, a := 2, queue.NumRequeues("one"); e != a { 51 t.Errorf("expected %v, got %v", e, a) 52 } 53 54 queue.AddRateLimited("two") 55 waitEntry = <-delayingQueue.waitingForAddCh 56 if e, a := 1*time.Millisecond, waitEntry.readyAt.Sub(fakeClock.Now()); e != a { 57 t.Errorf("expected %v, got %v", e, a) 58 } 59 queue.AddRateLimited("two") 60 waitEntry = <-delayingQueue.waitingForAddCh 61 if e, a := 2*time.Millisecond, waitEntry.readyAt.Sub(fakeClock.Now()); e != a { 62 t.Errorf("expected %v, got %v", e, a) 63 } 64 65 queue.Forget("one") 66 if e, a := 0, queue.NumRequeues("one"); e != a { 67 t.Errorf("expected %v, got %v", e, a) 68 } 69 queue.AddRateLimited("one") 70 waitEntry = <-delayingQueue.waitingForAddCh 71 if e, a := 1*time.Millisecond, waitEntry.readyAt.Sub(fakeClock.Now()); e != a { 72 t.Errorf("expected %v, got %v", e, a) 73 } 74 75} 76