ref(kube): isolate ensureNamespace and add tests

pkg/kube/client.go

@@ -77,7 +77,11 @@ func (e ErrAlreadyExists) Error() string {
 //
 // Namespace will set the namespace
 func (c *Client) Create(namespace string, reader io.Reader) error {
-	if err := c.ensureNamespace(namespace); err != nil {
+	client, err := c.ClientSet()
+	if err != nil {
+		return err
+	}
+	if err := ensureNamespace(client, namespace); err != nil {
 		return err
 	}
 	return perform(c, namespace, reader, createResource)
@@ -394,21 +398,6 @@ func waitForJob(e watch.Event, name string) (bool, error) {
 	return false, nil
 }
 
-func (c *Client) ensureNamespace(namespace string) error {
-	client, err := c.ClientSet()
-	if err != nil {
-		return err
-	}
-
-	ns := &api.Namespace{}
-	ns.Name = namespace
-	_, err = client.Namespaces().Create(ns)
-	if err != nil && !errors.IsAlreadyExists(err) {
-		return err
-	}
-	return nil
-}
-
 func deleteUnwantedResources(currentInfos, targetInfos []*resource.Info) {
 	for _, cInfo := range currentInfos {
 		if _, ok := findMatchingInfo(cInfo, targetInfos); !ok {

pkg/kube/namespace.go

@@ -0,0 +1,41 @@
+/*
+Copyright 2016 The Kubernetes Authors All rights reserved.
+
+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 kube // import "k8s.io/helm/pkg/kube"
+
+import (
+	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/api/errors"
+	"k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
+)
+
+func createNamespace(client internalclientset.Interface, namespace string) error {
+	ns := &api.Namespace{
+		ObjectMeta: api.ObjectMeta{
+			Name: namespace,
+		},
+	}
+	_, err := client.Core().Namespaces().Create(ns)
+	return err
+}
+
+func ensureNamespace(client internalclientset.Interface, namespace string) error {
+	err := createNamespace(client, namespace)
+	if err != nil && !errors.IsAlreadyExists(err) {
+		return err
+	}
+	return nil
+}

pkg/kube/namespace_test.go

@@ -0,0 +1,36 @@
+/*
+Copyright 2016 The Kubernetes Authors All rights reserved.
+
+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 kube // import "k8s.io/helm/pkg/kube"
+
+import (
+	"testing"
+
+	"k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset/fake"
+)
+
+func TestEnsureNamespace(t *testing.T) {
+	client := fake.NewSimpleClientset()
+	if err := ensureNamespace(client, "foo"); err != nil {
+		t.Fatalf("unexpected error: %s", err)
+	}
+	if err := ensureNamespace(client, "foo"); err != nil {
+		t.Fatalf("unexpected error: %s", err)
+	}
+	if _, err := client.Core().Namespaces().Get("foo"); err != nil {
+		t.Fatalf("unexpected error: %s", err)
+	}
+}