Add functions for testing new listers

cluster-autoscaler/utils/kubernetes/testlisters.go

@@ -0,0 +1,89 @@
+/*
+Copyright 2018 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
+
+import (
+	"fmt"
+
+	appsv1 "k8s.io/api/apps/v1"
+	batchv1 "k8s.io/api/batch/v1"
+	apiv1 "k8s.io/api/core/v1"
+	v1appslister "k8s.io/client-go/listers/apps/v1"
+	v1batchlister "k8s.io/client-go/listers/batch/v1"
+	v1lister "k8s.io/client-go/listers/core/v1"
+	"k8s.io/client-go/tools/cache"
+)
+
+// NewTestDaemonSetLister returns a lister that returns provided DaemonSets
+func NewTestDaemonSetLister(dss []*appsv1.DaemonSet) (v1appslister.DaemonSetLister, error) {
+	store := cache.NewIndexer(cache.MetaNamespaceKeyFunc, cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc})
+	for _, ds := range dss {
+		err := store.Add(ds)
+		if err != nil {
+			return nil, fmt.Errorf("Error adding object to cache: %v", err)
+		}
+	}
+	return v1appslister.NewDaemonSetLister(store), nil
+}
+
+// NewTestReplicationControllerLister returns a lister that returns provided ReplicationControllers
+func NewTestReplicationControllerLister(rcs []*apiv1.ReplicationController) (v1lister.ReplicationControllerLister, error) {
+	store := cache.NewIndexer(cache.MetaNamespaceKeyFunc, cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc})
+	for _, rc := range rcs {
+		err := store.Add(rc)
+		if err != nil {
+			return nil, fmt.Errorf("Error adding object to cache: %v", err)
+		}
+	}
+	return v1lister.NewReplicationControllerLister(store), nil
+}
+
+// NewTestJobLister returns a lister that returns provided Jobs
+func NewTestJobLister(jobs []*batchv1.Job) (v1batchlister.JobLister, error) {
+	store := cache.NewIndexer(cache.MetaNamespaceKeyFunc, cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc})
+	for _, job := range jobs {
+		err := store.Add(job)
+		if err != nil {
+			return nil, fmt.Errorf("Error adding object to cache: %v", err)
+		}
+	}
+	return v1batchlister.NewJobLister(store), nil
+}
+
+// NewTestReplicaSetLister returns a lister that returns provided ReplicaSets
+func NewTestReplicaSetLister(rss []*appsv1.ReplicaSet) (v1appslister.ReplicaSetLister, error) {
+	store := cache.NewIndexer(cache.MetaNamespaceKeyFunc, cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc})
+	for _, rs := range rss {
+		err := store.Add(rs)
+		if err != nil {
+			return nil, fmt.Errorf("Error adding object to cache: %v", err)
+		}
+	}
+	return v1appslister.NewReplicaSetLister(store), nil
+}
+
+// NewTestStatefulSetLister returns a lister that returns provided StatefulSets
+func NewTestStatefulSetLister(sss []*appsv1.StatefulSet) (v1appslister.StatefulSetLister, error) {
+	store := cache.NewIndexer(cache.MetaNamespaceKeyFunc, cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc})
+	for _, ss := range sss {
+		err := store.Add(ss)
+		if err != nil {
+			return nil, fmt.Errorf("Error adding object to cache: %v", err)
+		}
+	}
+	return v1appslister.NewStatefulSetLister(store), nil
+}