Add unit tests for KCM volume plugin probers

Author: jsafrane

cmd/kube-controller-manager/app/plugins_test.go

@@ -0,0 +1,83 @@
+/*
+Copyright 2024 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 app
+
+import (
+	"reflect"
+	"sort"
+	"testing"
+
+	"k8s.io/klog/v2/ktesting"
+	persistentvolumeconfig "k8s.io/kubernetes/pkg/controller/volume/persistentvolume/config"
+	"k8s.io/kubernetes/pkg/volume"
+)
+
+func checkPlugins(t *testing.T, got []volume.VolumePlugin, expected []string) {
+	pluginNames := make([]string, len(got))
+	for i, p := range got {
+		pluginNames[i] = p.GetPluginName()
+	}
+	sort.Strings(pluginNames)
+	sort.Strings(expected)
+	if !reflect.DeepEqual(pluginNames, expected) {
+		t.Errorf("Expected %+v, got %+v", expected, pluginNames)
+	}
+}
+
+func TestProbeAttachableVolumePlugins(t *testing.T) {
+	logger, _ := ktesting.NewTestContext(t)
+	plugins, err := ProbeAttachableVolumePlugins(logger)
+	if err != nil {
+		t.Fatalf("ProbeAttachableVolumePlugins failed: %s", err)
+	}
+	checkPlugins(t, plugins, []string{"kubernetes.io/csi", "kubernetes.io/fc", "kubernetes.io/iscsi", "kubernetes.io/portworx-volume"})
+}
+
+func TestProbeExpandableVolumePlugins(t *testing.T) {
+	logger, _ := ktesting.NewTestContext(t)
+	plugins, err := ProbeExpandableVolumePlugins(logger, getConfig())
+	if err != nil {
+		t.Fatalf("TestProbeExpandableVolumePlugins failed: %s", err)
+	}
+	checkPlugins(t, plugins, []string{"kubernetes.io/fc", "kubernetes.io/portworx-volume"})
+}
+
+func TestProbeControllerVolumePlugins(t *testing.T) {
+	logger, _ := ktesting.NewTestContext(t)
+	plugins, err := ProbeControllerVolumePlugins(logger, getConfig())
+	if err != nil {
+		t.Fatalf("ProbeControllerVolumePlugins failed: %s", err)
+	}
+	checkPlugins(t, plugins, []string{"kubernetes.io/host-path", "kubernetes.io/nfs", "kubernetes.io/portworx-volume"})
+}
+
+func getConfig() persistentvolumeconfig.VolumeConfiguration {
+	return persistentvolumeconfig.VolumeConfiguration{
+		EnableHostPathProvisioning: true,
+		EnableDynamicProvisioning:  true,
+		PersistentVolumeRecyclerConfiguration: persistentvolumeconfig.PersistentVolumeRecyclerConfiguration{
+			MaximumRetry:                5,
+			MinimumTimeoutNFS:           30,
+			PodTemplateFilePathNFS:      "",
+			IncrementTimeoutNFS:         10,
+			PodTemplateFilePathHostPath: "",
+			MinimumTimeoutHostPath:      30,
+			IncrementTimeoutHostPath:    10,
+		},
+		FlexVolumePluginDir: "",
+	}
+}