k8s.io/kubernetes@v1.29.3/pkg/controlplane/controller/systemnamespaces/system_namespaces_controller_test.go (about)

     1  /*
     2  Copyright 2023 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 systemnamespaces
    18  
    19  import (
    20  	"testing"
    21  
    22  	v1 "k8s.io/api/core/v1"
    23  	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
    24  	"k8s.io/apimachinery/pkg/labels"
    25  	"k8s.io/apimachinery/pkg/runtime"
    26  	"k8s.io/client-go/informers"
    27  	"k8s.io/client-go/kubernetes/fake"
    28  	k8stesting "k8s.io/client-go/testing"
    29  	"k8s.io/gengo/examples/set-gen/sets"
    30  )
    31  
    32  // Test_Controller validates the garbage collection logic for the apiserverleasegc controller.
    33  func Test_Controller(t *testing.T) {
    34  	systemNamespaces := []string{metav1.NamespaceSystem, metav1.NamespacePublic, v1.NamespaceNodeLease}
    35  
    36  	tests := []struct {
    37  		name       string
    38  		namespaces []string
    39  		actions    [][]string // verb and resource
    40  	}{
    41  		{
    42  			name: "no system namespaces",
    43  			actions: [][]string{
    44  				{"create", "namespaces"},
    45  				{"create", "namespaces"},
    46  				{"create", "namespaces"},
    47  				{"create", "namespaces"},
    48  			},
    49  		},
    50  		{
    51  			name:       "no system namespaces but others",
    52  			namespaces: []string{"foo", "bar"},
    53  			actions: [][]string{
    54  				{"create", "namespaces"},
    55  				{"create", "namespaces"},
    56  				{"create", "namespaces"},
    57  				{"create", "namespaces"},
    58  			},
    59  		},
    60  		{
    61  			name:       "one system namespace",
    62  			namespaces: []string{metav1.NamespaceSystem},
    63  			actions: [][]string{
    64  				{"create", "namespaces"},
    65  				{"create", "namespaces"},
    66  				{"create", "namespaces"},
    67  			},
    68  		},
    69  		{
    70  			name:       "two system namespaces",
    71  			namespaces: []string{metav1.NamespaceSystem, metav1.NamespacePublic},
    72  			actions: [][]string{
    73  				{"create", "namespaces"},
    74  				{"create", "namespaces"},
    75  			},
    76  		},
    77  		{
    78  			name:       "three namespaces",
    79  			namespaces: []string{metav1.NamespaceSystem, metav1.NamespacePublic, v1.NamespaceNodeLease},
    80  			actions: [][]string{
    81  				{"create", "namespaces"},
    82  			},
    83  		},
    84  
    85  		{
    86  			name:       "the four namespaces",
    87  			namespaces: []string{metav1.NamespaceSystem, metav1.NamespacePublic, v1.NamespaceNodeLease, v1.NamespaceDefault},
    88  		},
    89  	}
    90  
    91  	for _, test := range tests {
    92  		t.Run(test.name, func(t *testing.T) {
    93  			objs := []runtime.Object{}
    94  			for _, ns := range test.namespaces {
    95  				objs = append(objs,
    96  					&v1.Namespace{
    97  						ObjectMeta: metav1.ObjectMeta{
    98  							Name:      ns,
    99  							Namespace: "",
   100  						},
   101  					},
   102  				)
   103  			}
   104  			clientset := fake.NewSimpleClientset(objs...)
   105  			informerFactory := informers.NewSharedInformerFactory(clientset, 0)
   106  			namespaceInformer := informerFactory.Core().V1().Namespaces()
   107  			for _, obj := range objs {
   108  				namespaceInformer.Informer().GetIndexer().Add(obj)
   109  			}
   110  
   111  			controller := NewController(clientset, namespaceInformer)
   112  
   113  			clientset.PrependReactor("create", "namespaces", func(action k8stesting.Action) (bool, runtime.Object, error) {
   114  				create := action.(k8stesting.CreateAction)
   115  				namespaceInformer.Informer().GetIndexer().Add(create.GetObject())
   116  				return true, create.GetObject(), nil
   117  			})
   118  
   119  			controller.sync()
   120  
   121  			expectAction(t, clientset.Actions(), test.actions)
   122  			namespaces, err := controller.namespaceLister.List(labels.Everything())
   123  			if err != nil {
   124  				t.Errorf("unexpected error: %v", err)
   125  			}
   126  
   127  			got := sets.NewString()
   128  			for _, ns := range namespaces {
   129  				got.Insert(ns.Name)
   130  			}
   131  
   132  			if !got.HasAll(systemNamespaces...) {
   133  				t.Errorf("unexpected namespaces: %v", got.List())
   134  			}
   135  		})
   136  	}
   137  }
   138  
   139  func expectAction(t *testing.T, actions []k8stesting.Action, expected [][]string) {
   140  	t.Helper()
   141  	if len(actions) != len(expected) {
   142  		t.Fatalf("Expected at least %d actions, got %d", len(expected), len(actions))
   143  	}
   144  
   145  	for i, action := range actions {
   146  		verb := expected[i][0]
   147  		if action.GetVerb() != verb {
   148  			t.Errorf("Expected action %d verb to be %s, got %s", i, verb, action.GetVerb())
   149  		}
   150  		resource := expected[i][1]
   151  		if action.GetResource().Resource != resource {
   152  			t.Errorf("Expected action %d resource to be %s, got %s", i, resource, action.GetResource().Resource)
   153  		}
   154  	}
   155  }