Add test for storage

pkg/kubelet/nodeshutdown/storage_test.go

@@ -0,0 +1,69 @@
+/*
+Copyright 2022 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 nodeshutdown
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"testing"
+	"time"
+)
+
+func TestLocalStorage(t *testing.T) {
+	var localStorageStateFileName = "graceful_node_shutdown_state"
+	tempdir := os.TempDir()
+	path := filepath.Join(tempdir, localStorageStateFileName)
+	l := localStorage{
+		Path: path,
+	}
+	now := time.Now()
+	want := state{
+		StartTime: now,
+		EndTime:   now,
+	}
+	err := l.Store(want)
+	if err != nil {
+		t.Error(err)
+		return
+	}
+
+	got := state{}
+	err = l.Load(&got)
+	if err != nil {
+		t.Error(err)
+		return
+	}
+
+	if !want.StartTime.Equal(got.StartTime) || !want.EndTime.Equal(got.EndTime) {
+		t.Errorf("got %+v, want %+v", got, want)
+		return
+	}
+
+	raw, err := os.ReadFile(path)
+	if err != nil {
+		t.Error(err)
+		return
+	}
+	nowStr := now.Format(time.RFC3339Nano)
+	wantRaw := fmt.Sprintf(`{"startTime":"` + nowStr + `","endTime":"` + nowStr + `"}`)
+	if string(raw) != wantRaw {
+		t.Errorf("got %s, want %s", string(raw), wantRaw)
+		return
+	}
+
+}