diff --git a/client/cache/calc_utils_test.go b/client/cache/calc_utils_test.go
new file mode 100644
index 00000000..b98e71de
--- /dev/null
+++ b/client/cache/calc_utils_test.go
@@ -0,0 +1,241 @@
+package cache
+
+import (
+	"math"
+	"strconv"
+	"testing"
+)
+
+func TestIncr(t *testing.T) {
+	// int
+	var originVal interface{} = int(1)
+	var updateVal interface{} = int(2)
+	val, err := incr(originVal)
+	if err != nil {
+		t.Errorf("incr failed, err: %s", err.Error())
+		return
+	}
+	if val != updateVal {
+		t.Errorf("incr failed, expect %v, but %v actually", updateVal, val)
+		return
+	}
+	_, err = incr(int(1 << (strconv.IntSize - 1) - 1))
+	if err == nil {
+		t.Error("incr failed")
+		return
+	}
+
+	// int32
+	originVal = int32(1)
+	updateVal = int32(2)
+	val, err = incr(originVal)
+	if err != nil {
+		t.Errorf("incr failed, err: %s", err.Error())
+		return
+	}
+	if val != updateVal {
+		t.Errorf("incr failed, expect %v, but %v actually", updateVal, val)
+		return
+	}
+	_, err = incr(int32(math.MaxInt32))
+	if err == nil {
+		t.Error("incr failed")
+		return
+	}
+
+	// int64
+	originVal = int64(1)
+	updateVal = int64(2)
+	val, err = incr(originVal)
+	if err != nil {
+		t.Errorf("incr failed, err: %s", err.Error())
+		return
+	}
+	if val != updateVal {
+		t.Errorf("incr failed, expect %v, but %v actually", updateVal, val)
+		return
+	}
+	_, err = incr(int64(math.MaxInt64))
+	if err == nil {
+		t.Error("incr failed")
+		return
+	}
+
+	// uint
+	originVal = uint(1)
+	updateVal = uint(2)
+	val, err = incr(originVal)
+	if err != nil {
+		t.Errorf("incr failed, err: %s", err.Error())
+		return
+	}
+	if val != updateVal {
+		t.Errorf("incr failed, expect %v, but %v actually", updateVal, val)
+		return
+	}
+	_, err = incr(uint(1 << (strconv.IntSize) - 1))
+	if err == nil {
+		t.Error("incr failed")
+		return
+	}
+
+	// uint32
+	originVal = uint32(1)
+	updateVal = uint32(2)
+	val, err = incr(originVal)
+	if err != nil {
+		t.Errorf("incr failed, err: %s", err.Error())
+		return
+	}
+	if val != updateVal {
+		t.Errorf("incr failed, expect %v, but %v actually", updateVal, val)
+		return
+	}
+	_, err = incr(uint32(math.MaxUint32))
+	if err == nil {
+		t.Error("incr failed")
+		return
+	}
+
+	// uint64
+	originVal = uint64(1)
+	updateVal = uint64(2)
+	val, err = incr(originVal)
+	if err != nil {
+		t.Errorf("incr failed, err: %s", err.Error())
+		return
+	}
+	if val != updateVal {
+		t.Errorf("incr failed, expect %v, but %v actually", updateVal, val)
+		return
+	}
+	_, err = incr(uint64(math.MaxUint64))
+	if err == nil {
+		t.Error("incr failed")
+		return
+	}
+
+	// other type
+	_, err = incr("string")
+	if err == nil {
+		t.Error("incr failed")
+		return
+	}
+}
+
+func TestDecr(t *testing.T) {
+	// int
+	var originVal interface{} = int(2)
+	var updateVal interface{} = int(1)
+	val, err := decr(originVal)
+	if err != nil {
+		t.Errorf("decr failed, err: %s", err.Error())
+		return
+	}
+	if val != updateVal {
+		t.Errorf("decr failed, expect %v, but %v actually", updateVal, val)
+		return
+	}
+	_, err = decr(int(-1 << (strconv.IntSize - 1)))
+	if err == nil {
+		t.Error("decr failed")
+		return
+	}
+
+	// int32
+	originVal = int32(2)
+	updateVal = int32(1)
+	val, err = decr(originVal)
+	if err != nil {
+		t.Errorf("decr failed, err: %s", err.Error())
+		return
+	}
+	if val != updateVal {
+		t.Errorf("decr failed, expect %v, but %v actually", updateVal, val)
+		return
+	}
+	_, err = decr(int32(math.MinInt32))
+	if err == nil {
+		t.Error("decr failed")
+		return
+	}
+
+	// int64
+	originVal = int64(2)
+	updateVal = int64(1)
+	val, err = decr(originVal)
+	if err != nil {
+		t.Errorf("decr failed, err: %s", err.Error())
+		return
+	}
+	if val != updateVal {
+		t.Errorf("decr failed, expect %v, but %v actually", updateVal, val)
+		return
+	}
+	_, err = decr(int64(math.MinInt64))
+	if err == nil {
+		t.Error("decr failed")
+		return
+	}
+
+	// uint
+	originVal = uint(2)
+	updateVal = uint(1)
+	val, err = decr(originVal)
+	if err != nil {
+		t.Errorf("decr failed, err: %s", err.Error())
+		return
+	}
+	if val != updateVal {
+		t.Errorf("decr failed, expect %v, but %v actually", updateVal, val)
+		return
+	}
+	_, err = decr(uint(0))
+	if err == nil {
+		t.Error("decr failed")
+		return
+	}
+
+	// uint32
+	originVal = uint32(2)
+	updateVal = uint32(1)
+	val, err = decr(originVal)
+	if err != nil {
+		t.Errorf("decr failed, err: %s", err.Error())
+		return
+	}
+	if val != updateVal {
+		t.Errorf("decr failed, expect %v, but %v actually", updateVal, val)
+		return
+	}
+	_, err = decr(uint32(0))
+	if err == nil {
+		t.Error("decr failed")
+		return
+	}
+
+	// uint64
+	originVal = uint64(2)
+	updateVal = uint64(1)
+	val, err = decr(originVal)
+	if err != nil {
+		t.Errorf("decr failed, err: %s", err.Error())
+		return
+	}
+	if val != updateVal {
+		t.Errorf("decr failed, expect %v, but %v actually", updateVal, val)
+		return
+	}
+	_, err = decr(uint64(0))
+	if err == nil {
+		t.Error("decr failed")
+		return
+	}
+
+	// other type
+	_, err = decr("string")
+	if err == nil {
+		t.Error("decr failed")
+		return
+	}
+}
\ No newline at end of file