k8s.io/kubernetes@v1.29.3/test/images/agnhost/webhook/addlabel_test.go (about) 1 /* 2 Copyright 2019 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 webhook 18 19 import ( 20 "encoding/json" 21 "reflect" 22 "testing" 23 24 jsonpatch "github.com/evanphx/json-patch" 25 "k8s.io/api/admission/v1" 26 corev1 "k8s.io/api/core/v1" 27 metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" 28 "k8s.io/apimachinery/pkg/runtime" 29 ) 30 31 func TestAddLabel(t *testing.T) { 32 testCases := []struct { 33 name string 34 initialLabels map[string]string 35 expectedLabels map[string]string 36 }{ 37 { 38 name: "add first label", 39 initialLabels: nil, 40 expectedLabels: map[string]string{"added-label": "yes"}, 41 }, 42 { 43 name: "add second label", 44 initialLabels: map[string]string{"other-label": "yes"}, 45 expectedLabels: map[string]string{"other-label": "yes", "added-label": "yes"}, 46 }, 47 { 48 name: "idempotent update label", 49 initialLabels: map[string]string{"added-label": "yes"}, 50 expectedLabels: map[string]string{"added-label": "yes"}, 51 }, 52 } 53 54 for _, tc := range testCases { 55 t.Run(tc.name, func(t *testing.T) { 56 request := corev1.ConfigMap{ObjectMeta: metav1.ObjectMeta{Labels: tc.initialLabels}} 57 raw, err := json.Marshal(request) 58 if err != nil { 59 t.Fatal(err) 60 } 61 review := v1.AdmissionReview{Request: &v1.AdmissionRequest{Object: runtime.RawExtension{Raw: raw}}} 62 response := addLabel(review) 63 if response.Patch != nil { 64 patchObj, err := jsonpatch.DecodePatch(response.Patch) 65 if err != nil { 66 t.Fatal(err) 67 } 68 raw, err = patchObj.Apply(raw) 69 if err != nil { 70 t.Fatal(err) 71 } 72 } 73 74 objType := reflect.TypeOf(request) 75 objTest := reflect.New(objType).Interface() 76 err = json.Unmarshal(raw, objTest) 77 if err != nil { 78 t.Fatal(err) 79 } 80 actual := objTest.(*corev1.ConfigMap) 81 if !reflect.DeepEqual(actual.Labels, tc.expectedLabels) { 82 t.Errorf("\nexpected %#v, got %#v, patch: %v", actual.Labels, tc.expectedLabels, string(response.Patch)) 83 } 84 }) 85 } 86 }