rate_limiting_queue_test.go

Documentation: k8s.io/client-go/util/workqueue

     1  /*
     2  Copyright 2016 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package workqueue
    18  
    19  import (
    20  	"testing"
    21  	"time"
    22  
    23  	testingclock "k8s.io/utils/clock/testing"
    24  )
    25  
    26  func TestRateLimitingQueue(t *testing.T) {
    27  	limiter := NewItemExponentialFailureRateLimiter(1*time.Millisecond, 1*time.Second)
    28  	queue := NewRateLimitingQueue(limiter).(*rateLimitingType)
    29  	fakeClock := testingclock.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("", nil),
    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
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