k8s.io/client-go@v0.22.2/discovery/helper_blackbox_test.go (about) 1 /* 2 Copyright 2015 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 discovery_test 18 19 import ( 20 "bytes" 21 "encoding/json" 22 "errors" 23 "io" 24 "io/ioutil" 25 "net/http" 26 "strings" 27 "testing" 28 29 v1 "k8s.io/api/core/v1" 30 metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" 31 "k8s.io/apimachinery/pkg/runtime" 32 "k8s.io/apimachinery/pkg/runtime/schema" 33 "k8s.io/apimachinery/pkg/util/sets" 34 "k8s.io/client-go/discovery" 35 restclient "k8s.io/client-go/rest" 36 "k8s.io/client-go/rest/fake" 37 ) 38 39 func objBody(object interface{}) io.ReadCloser { 40 output, err := json.MarshalIndent(object, "", "") 41 if err != nil { 42 panic(err) 43 } 44 return ioutil.NopCloser(bytes.NewReader([]byte(output))) 45 } 46 47 func TestServerSupportsVersion(t *testing.T) { 48 tests := []struct { 49 name string 50 requiredVersion schema.GroupVersion 51 serverVersions []string 52 expectErr func(err error) bool 53 sendErr error 54 statusCode int 55 }{ 56 { 57 name: "explicit version supported", 58 requiredVersion: schema.GroupVersion{Version: "v1"}, 59 serverVersions: []string{"/version1", v1.SchemeGroupVersion.String()}, 60 statusCode: http.StatusOK, 61 }, 62 { 63 name: "explicit version not supported on server", 64 requiredVersion: schema.GroupVersion{Version: "v1"}, 65 serverVersions: []string{"version1"}, 66 expectErr: func(err error) bool { return strings.Contains(err.Error(), `server does not support API version "v1"`) }, 67 statusCode: http.StatusOK, 68 }, 69 { 70 name: "connection refused error", 71 serverVersions: []string{"version1"}, 72 sendErr: errors.New("connection refused"), 73 expectErr: func(err error) bool { return strings.Contains(err.Error(), "connection refused") }, 74 statusCode: http.StatusOK, 75 }, 76 { 77 name: "discovery fails due to 404 Not Found errors and thus serverVersions is empty, use requested GroupVersion", 78 requiredVersion: schema.GroupVersion{Version: "version1"}, 79 statusCode: http.StatusNotFound, 80 }, 81 } 82 83 for _, test := range tests { 84 fakeClient := fake.CreateHTTPClient(func(req *http.Request) (*http.Response, error) { 85 if test.sendErr != nil { 86 return nil, test.sendErr 87 } 88 header := http.Header{} 89 header.Set("Content-Type", runtime.ContentTypeJSON) 90 return &http.Response{StatusCode: test.statusCode, Header: header, Body: objBody(&metav1.APIVersions{Versions: test.serverVersions})}, nil 91 }) 92 c := discovery.NewDiscoveryClientForConfigOrDie(&restclient.Config{}) 93 c.RESTClient().(*restclient.RESTClient).Client = fakeClient 94 err := discovery.ServerSupportsVersion(c, test.requiredVersion) 95 if err == nil && test.expectErr != nil { 96 t.Errorf("expected error, got nil for [%s].", test.name) 97 } 98 if err != nil { 99 if test.expectErr == nil || !test.expectErr(err) { 100 t.Errorf("unexpected error for [%s]: %v.", test.name, err) 101 } 102 continue 103 } 104 } 105 } 106 107 func TestFilteredBy(t *testing.T) { 108 all := discovery.ResourcePredicateFunc(func(gv string, r *metav1.APIResource) bool { 109 return true 110 }) 111 none := discovery.ResourcePredicateFunc(func(gv string, r *metav1.APIResource) bool { 112 return false 113 }) 114 onlyV2 := discovery.ResourcePredicateFunc(func(gv string, r *metav1.APIResource) bool { 115 return strings.HasSuffix(gv, "/v2") || gv == "v2" 116 }) 117 onlyBar := discovery.ResourcePredicateFunc(func(gv string, r *metav1.APIResource) bool { 118 return r.Kind == "Bar" 119 }) 120 121 foo := []*metav1.APIResourceList{ 122 { 123 GroupVersion: "foo/v1", 124 APIResources: []metav1.APIResource{ 125 {Name: "bar", Kind: "Bar"}, 126 {Name: "test", Kind: "Test"}, 127 }, 128 }, 129 { 130 GroupVersion: "foo/v2", 131 APIResources: []metav1.APIResource{ 132 {Name: "bar", Kind: "Bar"}, 133 {Name: "test", Kind: "Test"}, 134 }, 135 }, 136 { 137 GroupVersion: "foo/v3", 138 APIResources: []metav1.APIResource{}, 139 }, 140 } 141 142 tests := []struct { 143 input []*metav1.APIResourceList 144 pred discovery.ResourcePredicate 145 expectedResources []string 146 }{ 147 {nil, all, []string{}}, 148 {[]*metav1.APIResourceList{ 149 {GroupVersion: "foo/v1"}, 150 }, all, []string{}}, 151 {foo, all, []string{"foo/v1.bar", "foo/v1.test", "foo/v2.bar", "foo/v2.test"}}, 152 {foo, onlyV2, []string{"foo/v2.bar", "foo/v2.test"}}, 153 {foo, onlyBar, []string{"foo/v1.bar", "foo/v2.bar"}}, 154 {foo, none, []string{}}, 155 } 156 for i, test := range tests { 157 filtered := discovery.FilteredBy(test.pred, test.input) 158 159 if expected, got := sets.NewString(test.expectedResources...), sets.NewString(stringify(filtered)...); !expected.Equal(got) { 160 t.Errorf("[%d] unexpected group versions: expected=%v, got=%v", i, test.expectedResources, stringify(filtered)) 161 } 162 } 163 } 164 165 func stringify(rls []*metav1.APIResourceList) []string { 166 result := []string{} 167 for _, rl := range rls { 168 for _, r := range rl.APIResources { 169 result = append(result, rl.GroupVersion+"."+r.Name) 170 } 171 if len(rl.APIResources) == 0 { 172 result = append(result, rl.GroupVersion) 173 } 174 } 175 return result 176 }