vendor files

vendor/k8s.io/client-go/discovery/discovery_client_test.go

@@ -0,0 +1,770 @@
+/*
+Copyright 2014 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package discovery_test
+
+import (
+	"encoding/json"
+	"fmt"
+	"mime"
+	"net/http"
+	"net/http/httptest"
+	"reflect"
+	"testing"
+
+	"github.com/gogo/protobuf/proto"
+	"github.com/googleapis/gnostic/OpenAPIv2"
+
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	"k8s.io/apimachinery/pkg/util/sets"
+	"k8s.io/apimachinery/pkg/version"
+	. "k8s.io/client-go/discovery"
+	restclient "k8s.io/client-go/rest"
+)
+
+func TestGetServerVersion(t *testing.T) {
+	expect := version.Info{
+		Major:     "foo",
+		Minor:     "bar",
+		GitCommit: "baz",
+	}
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
+		output, err := json.Marshal(expect)
+		if err != nil {
+			t.Errorf("unexpected encoding error: %v", err)
+			return
+		}
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusOK)
+		w.Write(output)
+	}))
+	defer server.Close()
+	client := NewDiscoveryClientForConfigOrDie(&restclient.Config{Host: server.URL})
+
+	got, err := client.ServerVersion()
+	if err != nil {
+		t.Fatalf("unexpected encoding error: %v", err)
+	}
+	if e, a := expect, *got; !reflect.DeepEqual(e, a) {
+		t.Errorf("expected %v, got %v", e, a)
+	}
+}
+
+func TestGetServerGroupsWithV1Server(t *testing.T) {
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
+		var obj interface{}
+		switch req.URL.Path {
+		case "/api":
+			obj = &metav1.APIVersions{
+				Versions: []string{
+					"v1",
+				},
+			}
+		default:
+			w.WriteHeader(http.StatusNotFound)
+			return
+		}
+		output, err := json.Marshal(obj)
+		if err != nil {
+			t.Fatalf("unexpected encoding error: %v", err)
+			return
+		}
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusOK)
+		w.Write(output)
+	}))
+	defer server.Close()
+	client := NewDiscoveryClientForConfigOrDie(&restclient.Config{Host: server.URL})
+	// ServerGroups should not return an error even if server returns error at /api and /apis
+	apiGroupList, err := client.ServerGroups()
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	groupVersions := metav1.ExtractGroupVersions(apiGroupList)
+	if !reflect.DeepEqual(groupVersions, []string{"v1"}) {
+		t.Errorf("expected: %q, got: %q", []string{"v1"}, groupVersions)
+	}
+}
+
+func TestGetServerGroupsWithBrokenServer(t *testing.T) {
+	for _, statusCode := range []int{http.StatusNotFound, http.StatusForbidden} {
+		server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
+			w.WriteHeader(statusCode)
+		}))
+		defer server.Close()
+		client := NewDiscoveryClientForConfigOrDie(&restclient.Config{Host: server.URL})
+		// ServerGroups should not return an error even if server returns Not Found or Forbidden error at all end points
+		apiGroupList, err := client.ServerGroups()
+		if err != nil {
+			t.Fatalf("unexpected error: %v", err)
+		}
+		groupVersions := metav1.ExtractGroupVersions(apiGroupList)
+		if len(groupVersions) != 0 {
+			t.Errorf("expected empty list, got: %q", groupVersions)
+		}
+	}
+}
+
+func TestGetServerResourcesWithV1Server(t *testing.T) {
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
+		var obj interface{}
+		switch req.URL.Path {
+		case "/api":
+			obj = &metav1.APIVersions{
+				Versions: []string{
+					"v1",
+				},
+			}
+		default:
+			w.WriteHeader(http.StatusNotFound)
+			return
+		}
+		output, err := json.Marshal(obj)
+		if err != nil {
+			t.Errorf("unexpected encoding error: %v", err)
+			return
+		}
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusOK)
+		w.Write(output)
+	}))
+	defer server.Close()
+	client := NewDiscoveryClientForConfigOrDie(&restclient.Config{Host: server.URL})
+	// ServerResources should not return an error even if server returns error at /api/v1.
+	serverResources, err := client.ServerResources()
+	if err != nil {
+		t.Errorf("unexpected error: %v", err)
+	}
+	gvs := groupVersions(serverResources)
+	if !sets.NewString(gvs...).Has("v1") {
+		t.Errorf("missing v1 in resource list: %v", serverResources)
+	}
+}
+
+func TestGetServerResources(t *testing.T) {
+	stable := metav1.APIResourceList{
+		GroupVersion: "v1",
+		APIResources: []metav1.APIResource{
+			{Name: "pods", Namespaced: true, Kind: "Pod"},
+			{Name: "services", Namespaced: true, Kind: "Service"},
+			{Name: "namespaces", Namespaced: false, Kind: "Namespace"},
+		},
+	}
+	beta := metav1.APIResourceList{
+		GroupVersion: "extensions/v1beta1",
+		APIResources: []metav1.APIResource{
+			{Name: "deployments", Namespaced: true, Kind: "Deployment"},
+			{Name: "ingresses", Namespaced: true, Kind: "Ingress"},
+			{Name: "jobs", Namespaced: true, Kind: "Job"},
+		},
+	}
+	tests := []struct {
+		resourcesList *metav1.APIResourceList
+		path          string
+		request       string
+		expectErr     bool
+	}{
+		{
+			resourcesList: &stable,
+			path:          "/api/v1",
+			request:       "v1",
+			expectErr:     false,
+		},
+		{
+			resourcesList: &beta,
+			path:          "/apis/extensions/v1beta1",
+			request:       "extensions/v1beta1",
+			expectErr:     false,
+		},
+		{
+			resourcesList: &stable,
+			path:          "/api/v1",
+			request:       "foobar",
+			expectErr:     true,
+		},
+	}
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
+		var list interface{}
+		switch req.URL.Path {
+		case "/api/v1":
+			list = &stable
+		case "/apis/extensions/v1beta1":
+			list = &beta
+		case "/api":
+			list = &metav1.APIVersions{
+				Versions: []string{
+					"v1",
+				},
+			}
+		case "/apis":
+			list = &metav1.APIGroupList{
+				Groups: []metav1.APIGroup{
+					{
+						Versions: []metav1.GroupVersionForDiscovery{
+							{GroupVersion: "extensions/v1beta1"},
+						},
+					},
+				},
+			}
+		default:
+			t.Logf("unexpected request: %s", req.URL.Path)
+			w.WriteHeader(http.StatusNotFound)
+			return
+		}
+		output, err := json.Marshal(list)
+		if err != nil {
+			t.Errorf("unexpected encoding error: %v", err)
+			return
+		}
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusOK)
+		w.Write(output)
+	}))
+	defer server.Close()
+	client := NewDiscoveryClientForConfigOrDie(&restclient.Config{Host: server.URL})
+	for _, test := range tests {
+		got, err := client.ServerResourcesForGroupVersion(test.request)
+		if test.expectErr {
+			if err == nil {
+				t.Error("unexpected non-error")
+			}
+			continue
+		}
+		if err != nil {
+			t.Errorf("unexpected error: %v", err)
+			continue
+		}
+		if !reflect.DeepEqual(got, test.resourcesList) {
+			t.Errorf("expected:\n%v\ngot:\n%v\n", test.resourcesList, got)
+		}
+	}
+
+	serverResources, err := client.ServerResources()
+	if err != nil {
+		t.Errorf("unexpected error: %v", err)
+	}
+	serverGroupVersions := sets.NewString(groupVersions(serverResources)...)
+	for _, api := range []string{"v1", "extensions/v1beta1"} {
+		if !serverGroupVersions.Has(api) {
+			t.Errorf("missing expected api %q in %v", api, serverResources)
+		}
+	}
+}
+
+var returnedOpenAPI = openapi_v2.Document{
+	Definitions: &openapi_v2.Definitions{
+		AdditionalProperties: []*openapi_v2.NamedSchema{
+			{
+				Name: "fake.type.1",
+				Value: &openapi_v2.Schema{
+					Properties: &openapi_v2.Properties{
+						AdditionalProperties: []*openapi_v2.NamedSchema{
+							{
+								Name: "count",
+								Value: &openapi_v2.Schema{
+									Type: &openapi_v2.TypeItem{
+										Value: []string{"integer"},
+									},
+								},
+							},
+						},
+					},
+				},
+			},
+			{
+				Name: "fake.type.2",
+				Value: &openapi_v2.Schema{
+					Properties: &openapi_v2.Properties{
+						AdditionalProperties: []*openapi_v2.NamedSchema{
+							{
+								Name: "count",
+								Value: &openapi_v2.Schema{
+									Type: &openapi_v2.TypeItem{
+										Value: []string{"array"},
+									},
+									Items: &openapi_v2.ItemsItem{
+										Schema: []*openapi_v2.Schema{
+											{
+												Type: &openapi_v2.TypeItem{
+													Value: []string{"string"},
+												},
+											},
+										},
+									},
+								},
+							},
+						},
+					},
+				},
+			},
+		},
+	},
+}
+
+func openapiSchemaFakeServer() (*httptest.Server, error) {
+	var sErr error
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
+		if req.URL.Path != "/swagger-2.0.0.pb-v1" {
+			sErr = fmt.Errorf("Unexpected url %v", req.URL)
+		}
+		if req.Method != "GET" {
+			sErr = fmt.Errorf("Unexpected method %v", req.Method)
+		}
+
+		mime.AddExtensionType(".pb-v1", "application/com.github.googleapis.gnostic.OpenAPIv2@68f4ded+protobuf")
+
+		output, err := proto.Marshal(&returnedOpenAPI)
+		if err != nil {
+			sErr = err
+			return
+		}
+		w.WriteHeader(http.StatusOK)
+		w.Write(output)
+	}))
+	return server, sErr
+}
+
+func TestGetOpenAPISchema(t *testing.T) {
+	server, err := openapiSchemaFakeServer()
+	if err != nil {
+		t.Errorf("unexpected error starting fake server: %v", err)
+	}
+	defer server.Close()
+
+	client := NewDiscoveryClientForConfigOrDie(&restclient.Config{Host: server.URL})
+	got, err := client.OpenAPISchema()
+	if err != nil {
+		t.Fatalf("unexpected error getting openapi: %v", err)
+	}
+	if e, a := returnedOpenAPI, *got; !reflect.DeepEqual(e, a) {
+		t.Errorf("expected %v, got %v", e, a)
+	}
+}
+
+func TestServerPreferredResources(t *testing.T) {
+	stable := metav1.APIResourceList{
+		GroupVersion: "v1",
+		APIResources: []metav1.APIResource{
+			{Name: "pods", Namespaced: true, Kind: "Pod"},
+			{Name: "services", Namespaced: true, Kind: "Service"},
+			{Name: "namespaces", Namespaced: false, Kind: "Namespace"},
+		},
+	}
+	tests := []struct {
+		resourcesList []*metav1.APIResourceList
+		response      func(w http.ResponseWriter, req *http.Request)
+		expectErr     func(err error) bool
+	}{
+		{
+			resourcesList: []*metav1.APIResourceList{&stable},
+			expectErr:     IsGroupDiscoveryFailedError,
+			response: func(w http.ResponseWriter, req *http.Request) {
+				var list interface{}
+				switch req.URL.Path {
+				case "/apis/extensions/v1beta1":
+					w.WriteHeader(http.StatusInternalServerError)
+					return
+				case "/api/v1":
+					list = &stable
+				case "/api":
+					list = &metav1.APIVersions{
+						Versions: []string{
+							"v1",
+						},
+					}
+				case "/apis":
+					list = &metav1.APIGroupList{
+						Groups: []metav1.APIGroup{
+							{
+								Versions: []metav1.GroupVersionForDiscovery{
+									{GroupVersion: "extensions/v1beta1"},
+								},
+							},
+						},
+					}
+				default:
+					t.Logf("unexpected request: %s", req.URL.Path)
+					w.WriteHeader(http.StatusNotFound)
+					return
+				}
+				output, err := json.Marshal(list)
+				if err != nil {
+					t.Errorf("unexpected encoding error: %v", err)
+					return
+				}
+				w.Header().Set("Content-Type", "application/json")
+				w.WriteHeader(http.StatusOK)
+				w.Write(output)
+			},
+		},
+		{
+			resourcesList: nil,
+			expectErr:     IsGroupDiscoveryFailedError,
+			response: func(w http.ResponseWriter, req *http.Request) {
+				var list interface{}
+				switch req.URL.Path {
+				case "/apis/extensions/v1beta1":
+					w.WriteHeader(http.StatusInternalServerError)
+					return
+				case "/api/v1":
+					w.WriteHeader(http.StatusInternalServerError)
+				case "/api":
+					list = &metav1.APIVersions{
+						Versions: []string{
+							"v1",
+						},
+					}
+				case "/apis":
+					list = &metav1.APIGroupList{
+						Groups: []metav1.APIGroup{
+							{
+								Versions: []metav1.GroupVersionForDiscovery{
+									{GroupVersion: "extensions/v1beta1"},
+								},
+							},
+						},
+					}
+				default:
+					t.Logf("unexpected request: %s", req.URL.Path)
+					w.WriteHeader(http.StatusNotFound)
+					return
+				}
+				output, err := json.Marshal(list)
+				if err != nil {
+					t.Errorf("unexpected encoding error: %v", err)
+					return
+				}
+				w.Header().Set("Content-Type", "application/json")
+				w.WriteHeader(http.StatusOK)
+				w.Write(output)
+			},
+		},
+	}
+	for _, test := range tests {
+		server := httptest.NewServer(http.HandlerFunc(test.response))
+		defer server.Close()
+
+		client := NewDiscoveryClientForConfigOrDie(&restclient.Config{Host: server.URL})
+		resources, err := client.ServerPreferredResources()
+		if test.expectErr != nil {
+			if err == nil {
+				t.Error("unexpected non-error")
+			}
+
+			continue
+		}
+		if err != nil {
+			t.Errorf("unexpected error: %v", err)
+			continue
+		}
+		got, err := GroupVersionResources(resources)
+		if err != nil {
+			t.Errorf("unexpected error: %v", err)
+			continue
+		}
+		expected, _ := GroupVersionResources(test.resourcesList)
+		if !reflect.DeepEqual(got, expected) {
+			t.Errorf("expected:\n%v\ngot:\n%v\n", test.resourcesList, got)
+		}
+		server.Close()
+	}
+}
+
+func TestServerPreferredResourcesRetries(t *testing.T) {
+	stable := metav1.APIResourceList{
+		GroupVersion: "v1",
+		APIResources: []metav1.APIResource{
+			{Name: "pods", Namespaced: true, Kind: "Pod"},
+		},
+	}
+	beta := metav1.APIResourceList{
+		GroupVersion: "extensions/v1",
+		APIResources: []metav1.APIResource{
+			{Name: "deployments", Namespaced: true, Kind: "Deployment"},
+		},
+	}
+
+	response := func(numErrors int) http.HandlerFunc {
+		var i = 0
+		return func(w http.ResponseWriter, req *http.Request) {
+			var list interface{}
+			switch req.URL.Path {
+			case "/apis/extensions/v1beta1":
+				if i < numErrors {
+					i++
+					w.WriteHeader(http.StatusInternalServerError)
+					return
+				}
+				list = &beta
+			case "/api/v1":
+				list = &stable
+			case "/api":
+				list = &metav1.APIVersions{
+					Versions: []string{
+						"v1",
+					},
+				}
+			case "/apis":
+				list = &metav1.APIGroupList{
+					Groups: []metav1.APIGroup{
+						{
+							Name: "extensions",
+							Versions: []metav1.GroupVersionForDiscovery{
+								{GroupVersion: "extensions/v1beta1"},
+							},
+							PreferredVersion: metav1.GroupVersionForDiscovery{
+								GroupVersion: "extensions/v1beta1",
+								Version:      "v1beta1",
+							},
+						},
+					},
+				}
+			default:
+				t.Logf("unexpected request: %s", req.URL.Path)
+				w.WriteHeader(http.StatusNotFound)
+				return
+			}
+			output, err := json.Marshal(list)
+			if err != nil {
+				t.Errorf("unexpected encoding error: %v", err)
+				return
+			}
+			w.Header().Set("Content-Type", "application/json")
+			w.WriteHeader(http.StatusOK)
+			w.Write(output)
+		}
+	}
+	tests := []struct {
+		responseErrors  int
+		expectResources int
+		expectedError   func(err error) bool
+	}{
+		{
+			responseErrors:  1,
+			expectResources: 2,
+			expectedError: func(err error) bool {
+				return err == nil
+			},
+		},
+		{
+			responseErrors:  2,
+			expectResources: 1,
+			expectedError:   IsGroupDiscoveryFailedError,
+		},
+	}
+
+	for i, tc := range tests {
+		server := httptest.NewServer(http.HandlerFunc(response(tc.responseErrors)))
+		defer server.Close()
+
+		client := NewDiscoveryClientForConfigOrDie(&restclient.Config{Host: server.URL})
+		resources, err := client.ServerPreferredResources()
+		if !tc.expectedError(err) {
+			t.Errorf("case %d: unexpected error: %v", i, err)
+		}
+		got, err := GroupVersionResources(resources)
+		if err != nil {
+			t.Errorf("case %d: unexpected error: %v", i, err)
+		}
+		if len(got) != tc.expectResources {
+			t.Errorf("case %d: expect %d resources, got %#v", i, tc.expectResources, got)
+		}
+		server.Close()
+	}
+}
+
+func TestServerPreferredNamespacedResources(t *testing.T) {
+	stable := metav1.APIResourceList{
+		GroupVersion: "v1",
+		APIResources: []metav1.APIResource{
+			{Name: "pods", Namespaced: true, Kind: "Pod"},
+			{Name: "services", Namespaced: true, Kind: "Service"},
+			{Name: "namespaces", Namespaced: false, Kind: "Namespace"},
+		},
+	}
+	batchv1 := metav1.APIResourceList{
+		GroupVersion: "batch/v1",
+		APIResources: []metav1.APIResource{
+			{Name: "jobs", Namespaced: true, Kind: "Job"},
+		},
+	}
+	batchv2alpha1 := metav1.APIResourceList{
+		GroupVersion: "batch/v2alpha1",
+		APIResources: []metav1.APIResource{
+			{Name: "jobs", Namespaced: true, Kind: "Job"},
+			{Name: "cronjobs", Namespaced: true, Kind: "CronJob"},
+		},
+	}
+	batchv3alpha1 := metav1.APIResourceList{
+		GroupVersion: "batch/v3alpha1",
+		APIResources: []metav1.APIResource{
+			{Name: "jobs", Namespaced: true, Kind: "Job"},
+			{Name: "cronjobs", Namespaced: true, Kind: "CronJob"},
+		},
+	}
+	tests := []struct {
+		response func(w http.ResponseWriter, req *http.Request)
+		expected map[schema.GroupVersionResource]struct{}
+	}{
+		{
+			response: func(w http.ResponseWriter, req *http.Request) {
+				var list interface{}
+				switch req.URL.Path {
+				case "/api/v1":
+					list = &stable
+				case "/api":
+					list = &metav1.APIVersions{
+						Versions: []string{
+							"v1",
+						},
+					}
+				default:
+					t.Logf("unexpected request: %s", req.URL.Path)
+					w.WriteHeader(http.StatusNotFound)
+					return
+				}
+				output, err := json.Marshal(list)
+				if err != nil {
+					t.Errorf("unexpected encoding error: %v", err)
+					return
+				}
+				w.Header().Set("Content-Type", "application/json")
+				w.WriteHeader(http.StatusOK)
+				w.Write(output)
+			},
+			expected: map[schema.GroupVersionResource]struct{}{
+				{Group: "", Version: "v1", Resource: "pods"}:     {},
+				{Group: "", Version: "v1", Resource: "services"}: {},
+			},
+		},
+		{
+			response: func(w http.ResponseWriter, req *http.Request) {
+				var list interface{}
+				switch req.URL.Path {
+				case "/apis":
+					list = &metav1.APIGroupList{
+						Groups: []metav1.APIGroup{
+							{
+								Name: "batch",
+								Versions: []metav1.GroupVersionForDiscovery{
+									{GroupVersion: "batch/v1", Version: "v1"},
+									{GroupVersion: "batch/v2alpha1", Version: "v2alpha1"},
+									{GroupVersion: "batch/v3alpha1", Version: "v3alpha1"},
+								},
+								PreferredVersion: metav1.GroupVersionForDiscovery{GroupVersion: "batch/v1", Version: "v1"},
+							},
+						},
+					}
+				case "/apis/batch/v1":
+					list = &batchv1
+				case "/apis/batch/v2alpha1":
+					list = &batchv2alpha1
+				case "/apis/batch/v3alpha1":
+					list = &batchv3alpha1
+				default:
+					t.Logf("unexpected request: %s", req.URL.Path)
+					w.WriteHeader(http.StatusNotFound)
+					return
+				}
+				output, err := json.Marshal(list)
+				if err != nil {
+					t.Errorf("unexpected encoding error: %v", err)
+					return
+				}
+				w.Header().Set("Content-Type", "application/json")
+				w.WriteHeader(http.StatusOK)
+				w.Write(output)
+			},
+			expected: map[schema.GroupVersionResource]struct{}{
+				{Group: "batch", Version: "v1", Resource: "jobs"}:           {},
+				{Group: "batch", Version: "v2alpha1", Resource: "cronjobs"}: {},
+			},
+		},
+		{
+			response: func(w http.ResponseWriter, req *http.Request) {
+				var list interface{}
+				switch req.URL.Path {
+				case "/apis":
+					list = &metav1.APIGroupList{
+						Groups: []metav1.APIGroup{
+							{
+								Name: "batch",
+								Versions: []metav1.GroupVersionForDiscovery{
+									{GroupVersion: "batch/v1", Version: "v1"},
+									{GroupVersion: "batch/v2alpha1", Version: "v2alpha1"},
+									{GroupVersion: "batch/v3alpha1", Version: "v3alpha1"},
+								},
+								PreferredVersion: metav1.GroupVersionForDiscovery{GroupVersion: "batch/v2alpha", Version: "v2alpha1"},
+							},
+						},
+					}
+				case "/apis/batch/v1":
+					list = &batchv1
+				case "/apis/batch/v2alpha1":
+					list = &batchv2alpha1
+				case "/apis/batch/v3alpha1":
+					list = &batchv3alpha1
+				default:
+					t.Logf("unexpected request: %s", req.URL.Path)
+					w.WriteHeader(http.StatusNotFound)
+					return
+				}
+				output, err := json.Marshal(list)
+				if err != nil {
+					t.Errorf("unexpected encoding error: %v", err)
+					return
+				}
+				w.Header().Set("Content-Type", "application/json")
+				w.WriteHeader(http.StatusOK)
+				w.Write(output)
+			},
+			expected: map[schema.GroupVersionResource]struct{}{
+				{Group: "batch", Version: "v2alpha1", Resource: "jobs"}:     {},
+				{Group: "batch", Version: "v2alpha1", Resource: "cronjobs"}: {},
+			},
+		},
+	}
+	for i, test := range tests {
+		server := httptest.NewServer(http.HandlerFunc(test.response))
+		defer server.Close()
+
+		client := NewDiscoveryClientForConfigOrDie(&restclient.Config{Host: server.URL})
+		resources, err := client.ServerPreferredNamespacedResources()
+		if err != nil {
+			t.Errorf("[%d] unexpected error: %v", i, err)
+			continue
+		}
+		got, err := GroupVersionResources(resources)
+		if err != nil {
+			t.Errorf("[%d] unexpected error: %v", i, err)
+			continue
+		}
+
+		if !reflect.DeepEqual(got, test.expected) {
+			t.Errorf("[%d] expected:\n%v\ngot:\n%v\n", i, test.expected, got)
+		}
+		server.Close()
+	}
+}
+
+func groupVersions(resources []*metav1.APIResourceList) []string {
+	result := []string{}
+	for _, resourceList := range resources {
+		result = append(result, resourceList.GroupVersion)
+	}
+	return result
+}