Move pkg/kubelet/util/csr into client-go

Everything else it depends on was already there, and now we have a
somewhat consistent code chain.

Kubernetes-commit: 5649f9a578f4f130f61579d77d5609fbdaf82a1f

util/certificate/csr/csr_test.go

@@ -0,0 +1,136 @@
+/*
+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 csr
+
+import (
+	"fmt"
+	"testing"
+
+	certificates "k8s.io/api/certificates/v1beta1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	watch "k8s.io/apimachinery/pkg/watch"
+	certificatesclient "k8s.io/client-go/kubernetes/typed/certificates/v1beta1"
+	certutil "k8s.io/client-go/util/cert"
+)
+
+func TestRequestNodeCertificateNoKeyData(t *testing.T) {
+	certData, err := RequestNodeCertificate(&fakeClient{}, []byte{}, "fake-node-name")
+	if err == nil {
+		t.Errorf("Got no error, wanted error an error because there was an empty private key passed in.")
+	}
+	if certData != nil {
+		t.Errorf("Got cert data, wanted nothing as there should have been an error.")
+	}
+}
+
+func TestRequestNodeCertificateErrorCreatingCSR(t *testing.T) {
+	client := &fakeClient{
+		failureType: createError,
+	}
+	privateKeyData, err := certutil.MakeEllipticPrivateKeyPEM()
+	if err != nil {
+		t.Fatalf("Unable to generate a new private key: %v", err)
+	}
+
+	certData, err := RequestNodeCertificate(client, privateKeyData, "fake-node-name")
+	if err == nil {
+		t.Errorf("Got no error, wanted error an error because client.Create failed.")
+	}
+	if certData != nil {
+		t.Errorf("Got cert data, wanted nothing as there should have been an error.")
+	}
+}
+
+func TestRequestNodeCertificate(t *testing.T) {
+	privateKeyData, err := certutil.MakeEllipticPrivateKeyPEM()
+	if err != nil {
+		t.Fatalf("Unable to generate a new private key: %v", err)
+	}
+
+	certData, err := RequestNodeCertificate(&fakeClient{}, privateKeyData, "fake-node-name")
+	if err != nil {
+		t.Errorf("Got %v, wanted no error.", err)
+	}
+	if certData == nil {
+		t.Errorf("Got nothing, expected a CSR.")
+	}
+}
+
+type FailureType int
+
+const (
+	noError FailureType = iota
+	createError
+	certificateSigningRequestDenied
+)
+
+type fakeClient struct {
+	certificatesclient.CertificateSigningRequestInterface
+	watch       *watch.FakeWatcher
+	failureType FailureType
+}
+
+func (c *fakeClient) Create(*certificates.CertificateSigningRequest) (*certificates.CertificateSigningRequest, error) {
+	if c.failureType == createError {
+		return nil, fmt.Errorf("fakeClient failed creating request")
+	}
+	csr := certificates.CertificateSigningRequest{
+		ObjectMeta: metav1.ObjectMeta{
+			UID:  "fake-uid",
+			Name: "fake-certificate-signing-request-name",
+		},
+	}
+	return &csr, nil
+}
+
+func (c *fakeClient) List(opts v1.ListOptions) (*certificates.CertificateSigningRequestList, error) {
+	return &certificates.CertificateSigningRequestList{}, nil
+}
+
+func (c *fakeClient) Watch(opts v1.ListOptions) (watch.Interface, error) {
+	c.watch = watch.NewFakeWithChanSize(1, false)
+	c.watch.Add(c.generateCSR())
+	c.watch.Stop()
+	return c.watch, nil
+}
+
+func (c *fakeClient) generateCSR() *certificates.CertificateSigningRequest {
+	var condition certificates.CertificateSigningRequestCondition
+	if c.failureType == certificateSigningRequestDenied {
+		condition = certificates.CertificateSigningRequestCondition{
+			Type: certificates.CertificateDenied,
+		}
+	} else {
+		condition = certificates.CertificateSigningRequestCondition{
+			Type: certificates.CertificateApproved,
+		}
+	}
+
+	csr := certificates.CertificateSigningRequest{
+		ObjectMeta: metav1.ObjectMeta{
+			UID: "fake-uid",
+		},
+		Status: certificates.CertificateSigningRequestStatus{
+			Conditions: []certificates.CertificateSigningRequestCondition{
+				condition,
+			},
+			Certificate: []byte{},
+		},
+	}
+	return &csr
+}