default kubernetes agent for generated clients

Set default kubernetes agent if empty

Kubernetes-commit: 3de44bd759a34f6fead9fe7254b5204684b99de8

kubernetes_test/clientset_test.go

@@ -0,0 +1,88 @@
+/*
+Copyright 2022 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 kubernetes_test
+
+import (
+ "context"
+ "net/http"
+ "net/http/httptest"
+ "testing"
+
+ v1 "k8s.io/api/core/v1"
+ metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+ "k8s.io/client-go/kubernetes"
+ "k8s.io/client-go/kubernetes/scheme"
+ "k8s.io/client-go/rest"
+)
+
+func TestClientUserAgent(t *testing.T) {
+ tests := []struct {
+ name string
+ userAgent string
+ expect string
+ }{
+ {
+ name: "empty",
+ expect: rest.DefaultKubernetesUserAgent(),
+ },
+ {
+ name: "custom",
+ userAgent: "test-agent",
+ expect: "test-agent",
+ },
+ }
+
+ for _, tc := range tests {
+ t.Run(tc.name, func(t *testing.T) {
+ ts := httptest.NewUnstartedServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+ userAgent := r.Header.Get("User-Agent")
+ if userAgent != tc.expect {
+ t.Errorf("User Agent expected: %s got: %s", tc.expect, userAgent)
+ http.Error(w, "Unexpected user agent", http.StatusBadRequest)
+ return
+ }
+ w.Header().Set("Content-Type", "application/json")
+ w.Write([]byte("{}"))
+ }))
+ ts.Start()
+ defer ts.Close()
+
+ gv := v1.SchemeGroupVersion
+ config := &rest.Config{
+ Host: ts.URL,
+ }
+ config.GroupVersion = &gv
+ config.NegotiatedSerializer = scheme.Codecs.WithoutConversion()
+ config.UserAgent = tc.userAgent
+ config.ContentType = "application/json"
+
+ client, err := kubernetes.NewForConfig(config)
+ if err != nil {
+ t.Fatalf("failed to create REST client: %v", err)
+ }
+ _, err = client.CoreV1().Pods("").List(context.TODO(), metav1.ListOptions{})
+ if err != nil {
+ t.Error(err)
+ }
+ _, err = client.CoreV1().Secrets("").List(context.TODO(), metav1.ListOptions{})
+ if err != nil {
+ t.Error(err)
+ }
+ })
+ }
+
+}