/*
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Copyright 2015 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package discovery_test
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import (
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"bytes"
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"encoding/json"
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"errors"
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"io"
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"io/ioutil"
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"net/http"
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"strings"
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"testing"
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v1 "k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/apimachinery/pkg/util/sets"
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"k8s.io/client-go/discovery"
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restclient "k8s.io/client-go/rest"
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"k8s.io/client-go/rest/fake"
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)
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func objBody(object interface{}) io.ReadCloser {
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output, err := json.MarshalIndent(object, "", "")
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if err != nil {
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panic(err)
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}
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return ioutil.NopCloser(bytes.NewReader([]byte(output)))
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}
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func TestServerSupportsVersion(t *testing.T) {
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tests := []struct {
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name string
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requiredVersion schema.GroupVersion
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serverVersions []string
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expectErr func(err error) bool
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sendErr error
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statusCode int
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}{
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{
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name: "explicit version supported",
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requiredVersion: schema.GroupVersion{Version: "v1"},
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serverVersions: []string{"/version1", v1.SchemeGroupVersion.String()},
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statusCode: http.StatusOK,
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},
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{
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name: "explicit version not supported on server",
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requiredVersion: schema.GroupVersion{Version: "v1"},
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serverVersions: []string{"version1"},
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expectErr: func(err error) bool { return strings.Contains(err.Error(), `server does not support API version "v1"`) },
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statusCode: http.StatusOK,
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},
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{
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name: "connection refused error",
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serverVersions: []string{"version1"},
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sendErr: errors.New("connection refused"),
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expectErr: func(err error) bool { return strings.Contains(err.Error(), "connection refused") },
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statusCode: http.StatusOK,
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},
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{
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name: "discovery fails due to 404 Not Found errors and thus serverVersions is empty, use requested GroupVersion",
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requiredVersion: schema.GroupVersion{Version: "version1"},
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statusCode: http.StatusNotFound,
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},
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}
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for _, test := range tests {
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fakeClient := fake.CreateHTTPClient(func(req *http.Request) (*http.Response, error) {
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if test.sendErr != nil {
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return nil, test.sendErr
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}
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header := http.Header{}
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header.Set("Content-Type", runtime.ContentTypeJSON)
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return &http.Response{StatusCode: test.statusCode, Header: header, Body: objBody(&metav1.APIVersions{Versions: test.serverVersions})}, nil
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})
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c := discovery.NewDiscoveryClientForConfigOrDie(&restclient.Config{})
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c.RESTClient().(*restclient.RESTClient).Client = fakeClient
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err := discovery.ServerSupportsVersion(c, test.requiredVersion)
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if err == nil && test.expectErr != nil {
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t.Errorf("expected error, got nil for [%s].", test.name)
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}
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if err != nil {
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if test.expectErr == nil || !test.expectErr(err) {
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t.Errorf("unexpected error for [%s]: %v.", test.name, err)
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}
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continue
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}
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}
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}
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func TestFilteredBy(t *testing.T) {
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all := discovery.ResourcePredicateFunc(func(gv string, r *metav1.APIResource) bool {
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return true
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})
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none := discovery.ResourcePredicateFunc(func(gv string, r *metav1.APIResource) bool {
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return false
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})
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onlyV2 := discovery.ResourcePredicateFunc(func(gv string, r *metav1.APIResource) bool {
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return strings.HasSuffix(gv, "/v2") || gv == "v2"
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})
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onlyBar := discovery.ResourcePredicateFunc(func(gv string, r *metav1.APIResource) bool {
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return r.Kind == "Bar"
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})
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foo := []*metav1.APIResourceList{
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{
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GroupVersion: "foo/v1",
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APIResources: []metav1.APIResource{
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{Name: "bar", Kind: "Bar"},
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{Name: "test", Kind: "Test"},
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},
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},
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{
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GroupVersion: "foo/v2",
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APIResources: []metav1.APIResource{
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{Name: "bar", Kind: "Bar"},
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{Name: "test", Kind: "Test"},
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},
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},
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{
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GroupVersion: "foo/v3",
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APIResources: []metav1.APIResource{},
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},
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}
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tests := []struct {
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input []*metav1.APIResourceList
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pred discovery.ResourcePredicate
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expectedResources []string
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}{
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{nil, all, []string{}},
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{[]*metav1.APIResourceList{
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{GroupVersion: "foo/v1"},
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}, all, []string{}},
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{foo, all, []string{"foo/v1.bar", "foo/v1.test", "foo/v2.bar", "foo/v2.test"}},
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{foo, onlyV2, []string{"foo/v2.bar", "foo/v2.test"}},
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{foo, onlyBar, []string{"foo/v1.bar", "foo/v2.bar"}},
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{foo, none, []string{}},
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}
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for i, test := range tests {
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filtered := discovery.FilteredBy(test.pred, test.input)
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if expected, got := sets.NewString(test.expectedResources...), sets.NewString(stringify(filtered)...); !expected.Equal(got) {
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t.Errorf("[%d] unexpected group versions: expected=%v, got=%v", i, test.expectedResources, stringify(filtered))
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}
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}
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}
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func stringify(rls []*metav1.APIResourceList) []string {
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result := []string{}
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for _, rl := range rls {
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for _, r := range rl.APIResources {
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result = append(result, rl.GroupVersion+"."+r.Name)
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}
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if len(rl.APIResources) == 0 {
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result = append(result, rl.GroupVersion)
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}
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}
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return result
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}
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