Adding an integration test for testing 202 status code from apiserver

test/integration/apiserver/apiserver_test.go

+// +build integration,!no-etcd
+
+/*
+Copyright 2017 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 apiserver
+
+import (
+	"bytes"
+	"io/ioutil"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/golang/glog"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	restclient "k8s.io/client-go/rest"
+	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/api/testapi"
+	"k8s.io/kubernetes/pkg/api/v1"
+	"k8s.io/kubernetes/pkg/apis/extensions/v1beta1"
+	"k8s.io/kubernetes/pkg/client/clientset_generated/clientset"
+	"k8s.io/kubernetes/test/integration/framework"
+)
+
+func setup(t *testing.T) (*httptest.Server, clientset.Interface) {
+	masterConfig := framework.NewIntegrationTestMasterConfig()
+	masterConfig.EnableCoreControllers = false
+	_, s := framework.RunAMaster(masterConfig)
+
+	clientSet, err := clientset.NewForConfig(&restclient.Config{Host: s.URL})
+	if err != nil {
+		t.Fatalf("Error in create clientset: %v", err)
+	}
+	return s, clientSet
+}
+
+func verifyStatusCode(t *testing.T, verb, URL, body string, expectedStatusCode int) {
+	// We dont use the typed Go client to send this request to be able to verify the response status code.
+	bodyBytes := bytes.NewReader([]byte(body))
+	req, err := http.NewRequest(verb, URL, bodyBytes)
+	if err != nil {
+		t.Fatalf("unexpected error: %v in sending req with verb: %s, URL: %s and body: %s", err, verb, URL, body)
+	}
+	transport := http.DefaultTransport
+	glog.Infof("Sending request: %v", req)
+	resp, err := transport.RoundTrip(req)
+	if err != nil {
+		t.Fatalf("unexpected error: %v in req: %v", err, req)
+	}
+	defer resp.Body.Close()
+	b, _ := ioutil.ReadAll(resp.Body)
+	if resp.StatusCode != expectedStatusCode {
+		t.Errorf("Expected status %v, but got %v", expectedStatusCode, resp.StatusCode)
+		t.Errorf("Body: %v", string(b))
+	}
+}
+
+func path(resource, namespace, name string) string {
+	return testapi.Extensions.ResourcePath(resource, namespace, name)
+}
+
+func newRS(namespace string) *v1beta1.ReplicaSet {
+	return &v1beta1.ReplicaSet{
+		TypeMeta: metav1.TypeMeta{
+			Kind:       "ReplicaSet",
+			APIVersion: "extensions/v1beta1",
+		},
+		ObjectMeta: metav1.ObjectMeta{
+			Namespace:    namespace,
+			GenerateName: "apiserver-test",
+		},
+		Spec: v1beta1.ReplicaSetSpec{
+			Template: v1.PodTemplateSpec{
+				ObjectMeta: metav1.ObjectMeta{
+					Labels: map[string]string{"name": "test"},
+				},
+				Spec: v1.PodSpec{
+					Containers: []v1.Container{
+						{
+							Name:  "fake-name",
+							Image: "fakeimage",
+						},
+					},
+				},
+			},
+		},
+	}
+}
+
+var cascDel string = `
+{
+  "kind": "DeleteOptions",
+  "apiVersion": "` + api.Registry.GroupOrDie(api.GroupName).GroupVersion.String() + `",
+  "orphanDependents": false
+}
+`
+
+// Tests that the apiserver returns 202 status code as expected.
+func Test202StatusCode(t *testing.T) {
+	s, clientSet := setup(t)
+	defer s.Close()
+
+	ns := framework.CreateTestingNamespace("status-code", s, t)
+	defer framework.DeleteTestingNamespace(ns, s, t)
+
+	rsClient := clientSet.Extensions().ReplicaSets(ns.Name)
+
+	// 1. Create the resource without any finalizer and then delete it without setting DeleteOptions.
+	// Verify that server returns 200 in this case.
+	rs, err := rsClient.Create(newRS(ns.Name))
+	if err != nil {
+		t.Fatalf("Failed to create rs: %v", err)
+	}
+	verifyStatusCode(t, "DELETE", s.URL+path("replicasets", ns.Name, rs.Name), "", 200)
+
+	// 2. Create the resource with a finalizer so that the resource is not immediately deleted and then delete it without setting DeleteOptions.
+	// Verify that the apiserver still returns 200 since DeleteOptions.OrphanDependents is not set.
+	rs = newRS(ns.Name)
+	rs.ObjectMeta.Finalizers = []string{"kube.io/dummy-finalizer"}
+	rs, err = rsClient.Create(rs)
+	if err != nil {
+		t.Fatalf("Failed to create rs: %v", err)
+	}
+	verifyStatusCode(t, "DELETE", s.URL+path("replicasets", ns.Name, rs.Name), "", 200)
+
+	// 3. Create the resource and then delete it with DeleteOptions.OrphanDependents=false.
+	// Verify that the server still returns 200 since the resource is immediately deleted.
+	rs = newRS(ns.Name)
+	rs, err = rsClient.Create(rs)
+	if err != nil {
+		t.Fatalf("Failed to create rs: %v", err)
+	}
+	verifyStatusCode(t, "DELETE", s.URL+path("replicasets", ns.Name, rs.Name), cascDel, 200)
+
+	// 4. Create the resource with a finalizer so that the resource is not immediately deleted and then delete it with DeleteOptions.OrphanDependents=false.
+	// Verify that the server returns 202 in this case.
+	rs = newRS(ns.Name)
+	rs.ObjectMeta.Finalizers = []string{"kube.io/dummy-finalizer"}
+	rs, err = rsClient.Create(rs)
+	if err != nil {
+		t.Fatalf("Failed to create rs: %v", err)
+	}
+	verifyStatusCode(t, "DELETE", s.URL+path("replicasets", ns.Name, rs.Name), cascDel, 202)
+}