default_servicecidr_controller_test.go

Documentation: k8s.io/kubernetes/pkg/controlplane/controller/defaultservicecidr

     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 defaultservicecidr
    18  
    19  import (
    20  	"testing"
    21  	"time"
    22  
    23  	"github.com/google/go-cmp/cmp"
    24  	networkingapiv1alpha1 "k8s.io/api/networking/v1alpha1"
    25  	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
    26  	"k8s.io/client-go/informers"
    27  	"k8s.io/client-go/kubernetes/fake"
    28  	k8stesting "k8s.io/client-go/testing"
    29  	"k8s.io/client-go/tools/record"
    30  	"k8s.io/utils/ptr"
    31  )
    32  
    33  const (
    34  	defaultIPv4CIDR = "10.16.0.0/16"
    35  	defaultIPv6CIDR = "2001:db8::/64"
    36  )
    37  
    38  func newController(t *testing.T, objects []*networkingapiv1alpha1.ServiceCIDR) (*fake.Clientset, *Controller) {
    39  	client := fake.NewSimpleClientset()
    40  
    41  	informerFactory := informers.NewSharedInformerFactory(client, 0)
    42  	serviceCIDRInformer := informerFactory.Networking().V1alpha1().ServiceCIDRs()
    43  
    44  	store := serviceCIDRInformer.Informer().GetStore()
    45  	for _, obj := range objects {
    46  		err := store.Add(obj)
    47  		if err != nil {
    48  			t.Fatal(err)
    49  		}
    50  
    51  	}
    52  	c := &Controller{
    53  		client:             client,
    54  		interval:           time.Second,
    55  		cidrs:              []string{defaultIPv4CIDR, defaultIPv6CIDR},
    56  		eventRecorder:      record.NewFakeRecorder(100),
    57  		serviceCIDRLister:  serviceCIDRInformer.Lister(),
    58  		serviceCIDRsSynced: func() bool { return true },
    59  	}
    60  
    61  	return client, c
    62  }
    63  
    64  func TestControllerSync(t *testing.T) {
    65  	testCases := []struct {
    66  		name    string
    67  		cidrs   []*networkingapiv1alpha1.ServiceCIDR
    68  		actions [][]string // verb and resource
    69  	}{
    70  		{
    71  			name:    "no existing service CIDRs",
    72  			actions: [][]string{{"create", "servicecidrs"}, {"patch", "servicecidrs"}},
    73  		},
    74  		{
    75  			name: "existing default service CIDR update Ready condition",
    76  			cidrs: []*networkingapiv1alpha1.ServiceCIDR{
    77  				{
    78  					ObjectMeta: metav1.ObjectMeta{
    79  						Name: DefaultServiceCIDRName,
    80  					},
    81  					Spec: networkingapiv1alpha1.ServiceCIDRSpec{
    82  						CIDRs: []string{defaultIPv4CIDR, defaultIPv6CIDR},
    83  					},
    84  				},
    85  			},
    86  			actions: [][]string{{"patch", "servicecidrs"}},
    87  		},
    88  		{
    89  			name: "existing default service CIDR not matching cidrs",
    90  			cidrs: []*networkingapiv1alpha1.ServiceCIDR{
    91  				{
    92  					ObjectMeta: metav1.ObjectMeta{
    93  						Name: DefaultServiceCIDRName,
    94  					},
    95  					Spec: networkingapiv1alpha1.ServiceCIDRSpec{
    96  						CIDRs: []string{"fd00::/112"},
    97  					},
    98  				},
    99  			},
   100  		},
   101  		{
   102  			name: "existing default service CIDR not ready",
   103  			cidrs: []*networkingapiv1alpha1.ServiceCIDR{
   104  				{
   105  					ObjectMeta: metav1.ObjectMeta{
   106  						Name: DefaultServiceCIDRName,
   107  					},
   108  					Spec: networkingapiv1alpha1.ServiceCIDRSpec{
   109  						CIDRs: []string{defaultIPv4CIDR, defaultIPv6CIDR},
   110  					},
   111  					Status: networkingapiv1alpha1.ServiceCIDRStatus{
   112  						Conditions: []metav1.Condition{
   113  							{
   114  								Type:   string(networkingapiv1alpha1.ServiceCIDRConditionReady),
   115  								Status: metav1.ConditionFalse,
   116  							},
   117  						},
   118  					},
   119  				},
   120  			},
   121  		},
   122  		{
   123  			name: "existing default service CIDR being deleted",
   124  			cidrs: []*networkingapiv1alpha1.ServiceCIDR{
   125  				{
   126  					ObjectMeta: metav1.ObjectMeta{
   127  						Name:              DefaultServiceCIDRName,
   128  						DeletionTimestamp: ptr.To(metav1.Now()),
   129  					},
   130  					Spec: networkingapiv1alpha1.ServiceCIDRSpec{
   131  						CIDRs: []string{defaultIPv4CIDR, defaultIPv6CIDR},
   132  					},
   133  				},
   134  			},
   135  		},
   136  		{
   137  			name: "existing service CIDRs but not default",
   138  			cidrs: []*networkingapiv1alpha1.ServiceCIDR{
   139  				{
   140  					ObjectMeta: metav1.ObjectMeta{
   141  						Name: "non-default-cidr",
   142  					},
   143  					Spec: networkingapiv1alpha1.ServiceCIDRSpec{
   144  						CIDRs: []string{defaultIPv4CIDR, defaultIPv6CIDR},
   145  					},
   146  				},
   147  			},
   148  			actions: [][]string{{"create", "servicecidrs"}, {"patch", "servicecidrs"}},
   149  		},
   150  	}
   151  
   152  	for _, tc := range testCases {
   153  		t.Run(tc.name, func(t *testing.T) {
   154  			client, controller := newController(t, tc.cidrs)
   155  			controller.sync()
   156  			expectAction(t, client.Actions(), tc.actions)
   157  		})
   158  	}
   159  }
   160  
   161  func expectAction(t *testing.T, actions []k8stesting.Action, expected [][]string) {
   162  	t.Helper()
   163  	if len(actions) != len(expected) {
   164  		t.Fatalf("Expected at least %d actions, got %d \ndiff: %v", len(expected), len(actions), cmp.Diff(expected, actions))
   165  	}
   166  
   167  	for i, action := range actions {
   168  		verb := expected[i][0]
   169  		if action.GetVerb() != verb {
   170  			t.Errorf("Expected action %d verb to be %s, got %s", i, verb, action.GetVerb())
   171  		}
   172  		resource := expected[i][1]
   173  		if action.GetResource().Resource != resource {
   174  			t.Errorf("Expected action %d resource to be %s, got %s", i, resource, action.GetResource().Resource)
   175  		}
   176  	}
   177  }
   178
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