knative.dev/pkg@v0.0.0-20260602142205-ac97e43f6622/configmap/manual_watcher_test.go (about)

     1  /*
     2  Copyright 2018 The Knative 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 configmap
    18  
    19  import (
    20  	"sync"
    21  	"testing"
    22  
    23  	corev1 "k8s.io/api/core/v1"
    24  	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
    25  )
    26  
    27  type counter struct {
    28  	name string
    29  	mu   sync.RWMutex
    30  	cfg  []*corev1.ConfigMap
    31  	wg   *sync.WaitGroup
    32  }
    33  
    34  func (c *counter) callback(cm *corev1.ConfigMap) {
    35  	c.mu.Lock()
    36  	defer c.mu.Unlock()
    37  	c.cfg = append(c.cfg, cm)
    38  	if c.wg != nil {
    39  		c.wg.Done()
    40  	}
    41  }
    42  
    43  func (c *counter) count() int {
    44  	c.mu.RLock()
    45  	defer c.mu.RUnlock()
    46  	return len(c.cfg)
    47  }
    48  
    49  func TestManualStartNOOP(t *testing.T) {
    50  	watcher := ManualWatcher{
    51  		Namespace: "default",
    52  	}
    53  	if err := watcher.Start(nil); err != nil {
    54  		t.Error("Unexpected error watcher.Start() =", err)
    55  	}
    56  }
    57  
    58  func TestCallbackInvoked(t *testing.T) {
    59  	watcher := ManualWatcher{
    60  		Namespace: "default",
    61  	}
    62  
    63  	// Verify empty works as designed.
    64  	watcher.OnChange(&corev1.ConfigMap{
    65  		ObjectMeta: metav1.ObjectMeta{
    66  			Namespace: "default",
    67  			Name:      "foo",
    68  		},
    69  	})
    70  	observer := counter{}
    71  
    72  	watcher.Watch("foo", observer.callback)
    73  	watcher.OnChange(&corev1.ConfigMap{
    74  		ObjectMeta: metav1.ObjectMeta{
    75  			Namespace: "default",
    76  			Name:      "foo",
    77  		},
    78  	})
    79  
    80  	if observer.count() == 0 {
    81  		t.Error("Expected callback to be invoked - got invocations", observer.count())
    82  	}
    83  }
    84  
    85  func TestDifferentNamespace(t *testing.T) {
    86  	watcher := ManualWatcher{
    87  		Namespace: "default",
    88  	}
    89  
    90  	observer := counter{}
    91  
    92  	watcher.Watch("foo", observer.callback)
    93  	watcher.OnChange(&corev1.ConfigMap{
    94  		ObjectMeta: metav1.ObjectMeta{
    95  			Namespace: "not-default",
    96  			Name:      "foo",
    97  		},
    98  	})
    99  
   100  	if observer.count() != 0 {
   101  		t.Error("Expected callback to be not be invoked - got invocations", observer.count())
   102  	}
   103  }
   104  
   105  func TestDifferentConfigName(t *testing.T) {
   106  	watcher := ManualWatcher{
   107  		Namespace: "default",
   108  	}
   109  
   110  	observer := counter{}
   111  
   112  	watcher.OnChange(&corev1.ConfigMap{
   113  		ObjectMeta: metav1.ObjectMeta{
   114  			Namespace: "default",
   115  			Name:      "foo",
   116  		},
   117  	})
   118  
   119  	watcher.Watch("bar", observer.callback)
   120  
   121  	if observer.count() != 0 {
   122  		t.Error("Expected callback to be not be invoked - got invocations", observer.count())
   123  	}
   124  }