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58155b7df05ab030fe327c92550918fecfcd1925
client-go/discovery/discovery_client_test.go
Alexander Zielenski 018cf8ace6 add fetching into discovery client for OpenAPI v3 
reflect latest struct changes

use correct discovery openapi test data layout

make the OpenAPIv3 interface less blue

field grouping

add copyrights

implement cached discovery client

add cached discovery tests

address review feedback

Kubernetes-commit: 075866b3e3ea029c243d82d8d6eb99e96d9c49d3
2022-03-22 10:40:56 -07:00

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/*
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
import (
"encoding/json"
"fmt"
"mime"
"net/http"
"net/http/httptest"
"reflect"
"testing"
"time"
"github.com/gogo/protobuf/proto"
openapi_v2 "github.com/google/gnostic/openapiv2"
openapi_v3 "github.com/google/gnostic/openapiv3"
"github.com/stretchr/testify/assert"
golangproto "google.golang.org/protobuf/proto"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/util/diff"
"k8s.io/apimachinery/pkg/util/sets"
"k8s.io/apimachinery/pkg/version"
restclient "k8s.io/client-go/rest"
testutil "k8s.io/client-go/util/testing"
)
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",
},
}
case "/apis":
obj = &metav1.APIGroupList{
Groups: []metav1.APIGroup{
{
Name: "extensions",
Versions: []metav1.GroupVersionForDiscovery{
{GroupVersion: "extensions/v1beta1"},
},
},
},
}
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", "extensions/v1beta1"}) {
t.Errorf("expected: %q, got: %q", []string{"v1", "extensions/v1beta1"}, 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 TestTimeoutIsSet(t *testing.T) {
cfg := &restclient.Config{}
setDiscoveryDefaults(cfg)
assert.Equal(t, defaultTimeout, cfg.Timeout)
}
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.ServerGroupsAndResources()
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 TestGetServerResourcesForGroupVersion(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"},
},
}
beta2 := metav1.APIResourceList{
GroupVersion: "extensions/v1beta2",
APIResources: []metav1.APIResource{
{Name: "deployments", Namespaced: true, Kind: "Deployment"},
{Name: "ingresses", Namespaced: true, Kind: "Ingress"},
{Name: "jobs", Namespaced: true, Kind: "Job"},
},
}
extensionsbeta3 := metav1.APIResourceList{GroupVersion: "extensions/v1beta3", APIResources: []metav1.APIResource{{Name: "deployments", Namespaced: true, Kind: "Deployment"}}}
extensionsbeta4 := metav1.APIResourceList{GroupVersion: "extensions/v1beta4", APIResources: []metav1.APIResource{{Name: "deployments", Namespaced: true, Kind: "Deployment"}}}
extensionsbeta5 := metav1.APIResourceList{GroupVersion: "extensions/v1beta5", APIResources: []metav1.APIResource{{Name: "deployments", Namespaced: true, Kind: "Deployment"}}}
extensionsbeta6 := metav1.APIResourceList{GroupVersion: "extensions/v1beta6", APIResources: []metav1.APIResource{{Name: "deployments", Namespaced: true, Kind: "Deployment"}}}
extensionsbeta7 := metav1.APIResourceList{GroupVersion: "extensions/v1beta7", APIResources: []metav1.APIResource{{Name: "deployments", Namespaced: true, Kind: "Deployment"}}}
extensionsbeta8 := metav1.APIResourceList{GroupVersion: "extensions/v1beta8", APIResources: []metav1.APIResource{{Name: "deployments", Namespaced: true, Kind: "Deployment"}}}
extensionsbeta9 := metav1.APIResourceList{GroupVersion: "extensions/v1beta9", APIResources: []metav1.APIResource{{Name: "deployments", Namespaced: true, Kind: "Deployment"}}}
extensionsbeta10 := metav1.APIResourceList{GroupVersion: "extensions/v1beta10", APIResources: []metav1.APIResource{{Name: "deployments", Namespaced: true, Kind: "Deployment"}}}
appsbeta1 := metav1.APIResourceList{GroupVersion: "apps/v1beta1", APIResources: []metav1.APIResource{{Name: "deployments", Namespaced: true, Kind: "Deployment"}}}
appsbeta2 := metav1.APIResourceList{GroupVersion: "apps/v1beta2", APIResources: []metav1.APIResource{{Name: "deployments", Namespaced: true, Kind: "Deployment"}}}
appsbeta3 := metav1.APIResourceList{GroupVersion: "apps/v1beta3", APIResources: []metav1.APIResource{{Name: "deployments", Namespaced: true, Kind: "Deployment"}}}
appsbeta4 := metav1.APIResourceList{GroupVersion: "apps/v1beta4", APIResources: []metav1.APIResource{{Name: "deployments", Namespaced: true, Kind: "Deployment"}}}
appsbeta5 := metav1.APIResourceList{GroupVersion: "apps/v1beta5", APIResources: []metav1.APIResource{{Name: "deployments", Namespaced: true, Kind: "Deployment"}}}
appsbeta6 := metav1.APIResourceList{GroupVersion: "apps/v1beta6", APIResources: []metav1.APIResource{{Name: "deployments", Namespaced: true, Kind: "Deployment"}}}
appsbeta7 := metav1.APIResourceList{GroupVersion: "apps/v1beta7", APIResources: []metav1.APIResource{{Name: "deployments", Namespaced: true, Kind: "Deployment"}}}
appsbeta8 := metav1.APIResourceList{GroupVersion: "apps/v1beta8", APIResources: []metav1.APIResource{{Name: "deployments", Namespaced: true, Kind: "Deployment"}}}
appsbeta9 := metav1.APIResourceList{GroupVersion: "apps/v1beta9", APIResources: []metav1.APIResource{{Name: "deployments", Namespaced: true, Kind: "Deployment"}}}
appsbeta10 := metav1.APIResourceList{GroupVersion: "apps/v1beta10", APIResources: []metav1.APIResource{{Name: "deployments", Namespaced: true, Kind: "Deployment"}}}
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 "/apis/extensions/v1beta2":
list = &beta2
case "/apis/extensions/v1beta3":
list = &extensionsbeta3
case "/apis/extensions/v1beta4":
list = &extensionsbeta4
case "/apis/extensions/v1beta5":
list = &extensionsbeta5
case "/apis/extensions/v1beta6":
list = &extensionsbeta6
case "/apis/extensions/v1beta7":
list = &extensionsbeta7
case "/apis/extensions/v1beta8":
list = &extensionsbeta8
case "/apis/extensions/v1beta9":
list = &extensionsbeta9
case "/apis/extensions/v1beta10":
list = &extensionsbeta10
case "/apis/apps/v1beta1":
list = &appsbeta1
case "/apis/apps/v1beta2":
list = &appsbeta2
case "/apis/apps/v1beta3":
list = &appsbeta3
case "/apis/apps/v1beta4":
list = &appsbeta4
case "/apis/apps/v1beta5":
list = &appsbeta5
case "/apis/apps/v1beta6":
list = &appsbeta6
case "/apis/apps/v1beta7":
list = &appsbeta7
case "/apis/apps/v1beta8":
list = &appsbeta8
case "/apis/apps/v1beta9":
list = &appsbeta9
case "/apis/apps/v1beta10":
list = &appsbeta10
case "/api":
list = &metav1.APIVersions{
Versions: []string{
"v1",
},
}
case "/apis":
list = &metav1.APIGroupList{
Groups: []metav1.APIGroup{
{
Name: "apps",
Versions: []metav1.GroupVersionForDiscovery{
{GroupVersion: "apps/v1beta1", Version: "v1beta1"},
{GroupVersion: "apps/v1beta2", Version: "v1beta2"},
{GroupVersion: "apps/v1beta3", Version: "v1beta3"},
{GroupVersion: "apps/v1beta4", Version: "v1beta4"},
{GroupVersion: "apps/v1beta5", Version: "v1beta5"},
{GroupVersion: "apps/v1beta6", Version: "v1beta6"},
{GroupVersion: "apps/v1beta7", Version: "v1beta7"},
{GroupVersion: "apps/v1beta8", Version: "v1beta8"},
{GroupVersion: "apps/v1beta9", Version: "v1beta9"},
{GroupVersion: "apps/v1beta10", Version: "v1beta10"},
},
},
{
Name: "extensions",
Versions: []metav1.GroupVersionForDiscovery{
{GroupVersion: "extensions/v1beta1", Version: "v1beta1"},
{GroupVersion: "extensions/v1beta2", Version: "v1beta2"},
{GroupVersion: "extensions/v1beta3", Version: "v1beta3"},
{GroupVersion: "extensions/v1beta4", Version: "v1beta4"},
{GroupVersion: "extensions/v1beta5", Version: "v1beta5"},
{GroupVersion: "extensions/v1beta6", Version: "v1beta6"},
{GroupVersion: "extensions/v1beta7", Version: "v1beta7"},
{GroupVersion: "extensions/v1beta8", Version: "v1beta8"},
{GroupVersion: "extensions/v1beta9", Version: "v1beta9"},
{GroupVersion: "extensions/v1beta10", Version: "v1beta10"},
},
},
},
}
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()
for _, test := range tests {
client := NewDiscoveryClientForConfigOrDie(&restclient.Config{Host: server.URL})
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)
}
}
client := NewDiscoveryClientForConfigOrDie(&restclient.Config{Host: server.URL})
start := time.Now()
_, serverResources, err := client.ServerGroupsAndResources()
if err != nil {
t.Errorf("unexpected error: %v", err)
}
end := time.Now()
if d := end.Sub(start); d > time.Second {
t.Errorf("took too long to perform discovery: %s", d)
}
serverGroupVersions := groupVersions(serverResources)
expectedGroupVersions := []string{
"v1",
"apps/v1beta1",
"apps/v1beta2",
"apps/v1beta3",
"apps/v1beta4",
"apps/v1beta5",
"apps/v1beta6",
"apps/v1beta7",
"apps/v1beta8",
"apps/v1beta9",
"apps/v1beta10",
"extensions/v1beta1",
"extensions/v1beta2",
"extensions/v1beta3",
"extensions/v1beta4",
"extensions/v1beta5",
"extensions/v1beta6",
"extensions/v1beta7",
"extensions/v1beta8",
"extensions/v1beta9",
"extensions/v1beta10",
}
if !reflect.DeepEqual(expectedGroupVersions, serverGroupVersions) {
t.Errorf("unexpected group versions: %v", diff.ObjectReflectDiff(expectedGroupVersions, serverGroupVersions))
}
}
func returnedOpenAPI() *openapi_v2.Document {
return &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 openapiSchemaDeprecatedFakeServer(status int, t *testing.T) (*httptest.Server, error) {
server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
if req.URL.Path == "/openapi/v2" {
// write the error status for the new endpoint request
w.WriteHeader(status)
return
}
if req.URL.Path != "/swagger-2.0.0.pb-v1" {
errMsg := fmt.Sprintf("Unexpected url %v", req.URL)
w.WriteHeader(http.StatusNotFound)
w.Write([]byte(errMsg))
t.Errorf("testing should fail as %s", errMsg)
return
}
if req.Method != "GET" {
errMsg := fmt.Sprintf("Unexpected method %v", req.Method)
w.WriteHeader(http.StatusMethodNotAllowed)
w.Write([]byte(errMsg))
t.Errorf("testing should fail as %s", errMsg)
return
}
mime.AddExtensionType(".pb-v1", "application/com.github.googleapis.gnostic.OpenAPIv2@68f4ded+protobuf")
output, err := proto.Marshal(returnedOpenAPI())
if err != nil {
errMsg := fmt.Sprintf("Unexpected marshal error: %v", err)
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte(errMsg))
t.Errorf("testing should fail as %s", errMsg)
return
}
w.WriteHeader(http.StatusOK)
w.Write(output)
}))
return server, nil
}
func openapiSchemaFakeServer(t *testing.T) (*httptest.Server, error) {
server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
if req.URL.Path != "/openapi/v2" {
errMsg := fmt.Sprintf("Unexpected url %v", req.URL)
w.WriteHeader(http.StatusNotFound)
w.Write([]byte(errMsg))
t.Errorf("testing should fail as %s", errMsg)
return
}
if req.Method != "GET" {
errMsg := fmt.Sprintf("Unexpected method %v", req.Method)
w.WriteHeader(http.StatusMethodNotAllowed)
w.Write([]byte(errMsg))
t.Errorf("testing should fail as %s", errMsg)
return
}
decipherableFormat := req.Header.Get("Accept")
if decipherableFormat != "application/com.github.proto-openapi.spec.v2@v1.0+protobuf" {
errMsg := fmt.Sprintf("Unexpected accept mime type %v", decipherableFormat)
w.WriteHeader(http.StatusUnsupportedMediaType)
w.Write([]byte(errMsg))
t.Errorf("testing should fail as %s", errMsg)
return
}
mime.AddExtensionType(".pb-v1", "application/com.github.googleapis.gnostic.OpenAPIv2@68f4ded+protobuf")
output, err := proto.Marshal(returnedOpenAPI())
if err != nil {
errMsg := fmt.Sprintf("Unexpected marshal error: %v", err)
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte(errMsg))
t.Errorf("testing should fail as %s", errMsg)
return
}
w.WriteHeader(http.StatusOK)
w.Write(output)
}))
return server, nil
}
func openapiV3SchemaFakeServer(t *testing.T) (*httptest.Server, map[string]*openapi_v3.Document, error) {
res, err := testutil.NewFakeOpenAPIV3Server("testdata")
if err != nil {
return nil, nil, err
}
return res.HttpServer, res.ServedDocuments, nil
}
func TestGetOpenAPISchema(t *testing.T) {
server, err := openapiSchemaFakeServer(t)
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; !golangproto.Equal(e, a) {
t.Errorf("expected \n%v, got \n%v", e, a)
}
}
func TestGetOpenAPISchemaV3(t *testing.T) {
server, testV3Specs, err := openapiV3SchemaFakeServer(t)
if err != nil {
t.Errorf("unexpected error starting fake server: %v", err)
}
defer server.Close()
client := NewDiscoveryClientForConfigOrDie(&restclient.Config{Host: server.URL})
openapiClient := client.OpenAPIV3()
paths, err := openapiClient.Paths()
if err != nil {
t.Fatalf("unexpected error getting openapi: %v", err)
}
for k, v := range paths {
actual, err := v.Schema()
if err != nil {
t.Fatal(err)
}
expected := testV3Specs[k]
if !golangproto.Equal(expected, actual) {
t.Fatalf("expected \n%v\n\ngot:\n%v", expected, actual)
}
// Ensure that fetching schema once again does not return same instance
actualAgain, err := v.Schema()
if err != nil {
t.Fatal(err)
}
if reflect.ValueOf(actual).Pointer() == reflect.ValueOf(actualAgain).Pointer() {
t.Fatal("expected schema not to be cached")
} else if !golangproto.Equal(actual, actualAgain) {
t.Fatal("expected schema values to be equal")
}
}
}
func TestGetOpenAPISchemaForbiddenFallback(t *testing.T) {
server, err := openapiSchemaDeprecatedFakeServer(http.StatusForbidden, t)
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; !golangproto.Equal(e, a) {
t.Errorf("expected %v, got %v", e, a)
}
}
func TestGetOpenAPISchemaNotFoundFallback(t *testing.T) {
server, err := openapiSchemaDeprecatedFakeServer(http.StatusNotFound, t)
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; !golangproto.Equal(e, a) {
t.Errorf("expected %v, got %v", e, a)
}
}
func TestGetOpenAPISchemaNotAcceptableFallback(t *testing.T) {
server, err := openapiSchemaDeprecatedFakeServer(http.StatusNotAcceptable, t)
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; !golangproto.Equal(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", Version: "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
}
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