VOL-2017 voltha-lib moved from voltha-go;
release version 2.2.1

Based on voltha-go commit 5259f8e52b3e3f5c7ad422a4b0e506e1d07f6b36

Change-Id: I8bbecdf456e420714a4016120eafc0d237c80565
diff --git a/pkg/db/kvstore/kvutils_test.go b/pkg/db/kvstore/kvutils_test.go
new file mode 100644
index 0000000..86c4369
--- /dev/null
+++ b/pkg/db/kvstore/kvutils_test.go
@@ -0,0 +1,82 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * 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 kvstore
+
+import (
+	"github.com/stretchr/testify/assert"
+	"testing"
+	"time"
+)
+
+func TestDurationWithNegativeTimeout(t *testing.T) {
+	actualResult := GetDuration(-1)
+	var expectedResult = defaultKVGetTimeout * time.Second
+
+	assert.Equal(t, expectedResult, actualResult)
+}
+
+func TestDurationWithZeroTimeout(t *testing.T) {
+	actualResult := GetDuration(0)
+	var expectedResult = defaultKVGetTimeout * time.Second
+
+	assert.Equal(t, expectedResult, actualResult)
+}
+
+func TestDurationWithTimeout(t *testing.T) {
+	actualResult := GetDuration(10)
+	var expectedResult = time.Duration(10) * time.Second
+
+	assert.Equal(t, expectedResult, actualResult)
+}
+
+func TestToStringWithString(t *testing.T) {
+	actualResult, _ := ToString("myString")
+	var expectedResult = "myString"
+
+	assert.Equal(t, expectedResult, actualResult)
+}
+
+func TestToStringWithEmpty(t *testing.T) {
+	actualResult, _ := ToString("")
+	var expectedResult = ""
+
+	assert.Equal(t, expectedResult, actualResult)
+}
+
+func TestToStringWithByte(t *testing.T) {
+	mByte := []byte("Hello")
+	actualResult, _ := ToString(mByte)
+	var expectedResult = "Hello"
+
+	assert.Equal(t, expectedResult, actualResult)
+}
+
+func TestToStringWithEmptyByte(t *testing.T) {
+	mByte := []byte("")
+	actualResult, _ := ToString(mByte)
+	var expectedResult = ""
+
+	assert.Equal(t, expectedResult, actualResult)
+}
+
+func TestToStringForErrorCase(t *testing.T) {
+	mInt := 200
+	actualResult, error := ToString(mInt)
+	var expectedResult = ""
+
+	assert.Equal(t, expectedResult, actualResult)
+	assert.NotEqual(t, error, nil)
+}