diff --git a/ledis/t_ttl_test.go b/ledis/t_ttl_test.go
index 0f2cdac..e7ec920 100644
--- a/ledis/t_ttl_test.go
+++ b/ledis/t_ttl_test.go
@@ -9,67 +9,165 @@ import (
 
 var m sync.Mutex
 
-func TestKvExpire(t *testing.T) {
-	db := getTestDB()
-	m.Lock()
-	defer m.Unlock()
+type adaptor struct {
+	set    func([]byte, []byte) (int64, error)
+	del    func([]byte) (int64, error)
+	exists func([]byte) (int64, error)
 
-	k := []byte("ttl_a")
-	ek := []byte("ttl_b")
-	db.Set(k, []byte("1"))
+	expire   func([]byte, int64) (int64, error)
+	expireAt func([]byte, int64) (int64, error)
+	ttl      func([]byte) (int64, error)
 
-	if ok, _ := db.Expire(k, 10); ok != 1 {
-		t.Fatal(ok)
-	}
-
-	//	err - expire on an inexisting key
-	if ok, _ := db.Expire(ek, 10); ok != 0 {
-		t.Fatal(ok)
-	}
-
-	//	err - duration is zero
-	if ok, err := db.Expire(k, 0); err == nil || ok != 0 {
-		t.Fatal(fmt.Sprintf("res = %d, err = %s", ok, err))
-	}
-
-	//	err - duration is negative
-	if ok, err := db.Expire(k, -10); err == nil || ok != 0 {
-		t.Fatal(fmt.Sprintf("res = %d, err = %s", ok, err))
-	}
+	showIdent func() string
 }
 
-func TestKvExpireAt(t *testing.T) {
-	db := getTestDB()
-	m.Lock()
-	defer m.Unlock()
-
-	k := []byte("ttl_a")
-	ek := []byte("ttl_b")
-	db.Set(k, []byte("1"))
-
-	now := time.Now().Unix()
-
-	if ok, _ := db.ExpireAt(k, now+5); ok != 1 {
-		t.Fatal(ok)
+func kvAdaptor(db *DB) *adaptor {
+	adp := new(adaptor)
+	adp.showIdent = func() string {
+		return "kv-adptor"
 	}
 
-	//	err - expire on an inexisting key
-	if ok, _ := db.ExpireAt(ek, now+5); ok != 0 {
-		t.Fatal(ok)
+	adp.set = db.SetNX
+	adp.exists = db.Exists
+	adp.del = func(k []byte) (int64, error) {
+		return db.Del(k)
 	}
 
-	//	err - expire with the current time
-	if ok, err := db.ExpireAt(k, now); err == nil || ok != 0 {
-		t.Fatal(fmt.Sprintf("res = %d, err = %s", ok, err))
-	}
+	adp.expire = db.Expire
+	adp.expireAt = db.ExpireAt
+	adp.ttl = db.TTL
 
-	//	err - expire with the time before
-	if ok, err := db.ExpireAt(k, now-5); err == nil || ok != 0 {
-		t.Fatal(fmt.Sprintf("res = %d, err = %s", ok, err))
-	}
+	return adp
 }
 
-func TestKvTTL(t *testing.T) {
+func listAdaptor(db *DB) *adaptor {
+	adp := new(adaptor)
+	adp.showIdent = func() string {
+		return "list-adptor"
+	}
+
+	adp.set = func(k []byte, v []byte) (int64, error) {
+		eles := make([][]byte, 0)
+		for i := 0; i < 3; i++ {
+			e := []byte(String(v) + fmt.Sprintf("_%d", i))
+			eles = append(eles, e)
+		}
+
+		if n, err := db.LPush(k, eles...); err != nil {
+			return 0, err
+		} else {
+			return n, nil
+		}
+	}
+
+	adp.exists = func(k []byte) (int64, error) {
+		if llen, err := db.LLen(k); err != nil || llen <= 0 {
+			return 0, err
+		} else {
+			return 1, nil
+		}
+	}
+
+	adp.del = db.LClear
+	adp.expire = db.LExpire
+	adp.expireAt = db.LExpireAt
+	adp.ttl = db.LTTL
+
+	return adp
+}
+
+func hashAdaptor(db *DB) *adaptor {
+	adp := new(adaptor)
+	adp.showIdent = func() string {
+		return "hash-adptor"
+	}
+
+	adp.set = func(k []byte, v []byte) (int64, error) {
+		datas := make([]FVPair, 0)
+		for i := 0; i < 3; i++ {
+			suffix := fmt.Sprintf("_%d", i)
+			pair := FVPair{
+				Field: []byte(String(k) + suffix),
+				Value: []byte(String(v) + suffix)}
+
+			datas = append(datas, pair)
+		}
+
+		if err := db.HMset(k, datas...); err != nil {
+			return 0, err
+		} else {
+			return int64(len(datas)), nil
+		}
+	}
+
+	adp.exists = func(k []byte) (int64, error) {
+		if hlen, err := db.HLen(k); err != nil || hlen <= 0 {
+			return 0, err
+		} else {
+			return 1, nil
+		}
+	}
+
+	adp.del = db.HClear
+	adp.expire = db.HExpire
+	adp.expireAt = db.HExpireAt
+	adp.ttl = db.HTTL
+
+	return adp
+}
+
+func zsetAdaptor(db *DB) *adaptor {
+	adp := new(adaptor)
+	adp.showIdent = func() string {
+		return "zset-adptor"
+	}
+
+	adp.set = func(k []byte, v []byte) (int64, error) {
+		datas := make([]ScorePair, 0)
+		for i := 0; i < 3; i++ {
+			memb := []byte(String(k) + fmt.Sprintf("_%d", i))
+			pair := ScorePair{
+				Score:  int64(i),
+				Member: memb}
+
+			datas = append(datas, pair)
+		}
+
+		if n, err := db.ZAdd(k, datas...); err != nil {
+			return 0, err
+		} else {
+			return n, nil
+		}
+	}
+
+	adp.exists = func(k []byte) (int64, error) {
+		if cnt, err := db.ZCard(k); err != nil || cnt <= 0 {
+			return 0, err
+		} else {
+			return 1, nil
+		}
+	}
+
+	adp.del = db.ZClear
+	adp.expire = db.ZExpire
+	adp.expireAt = db.ZExpireAt
+	adp.ttl = db.ZTTL
+
+	return adp
+}
+
+func allAdaptors(db *DB) []*adaptor {
+	adps := make([]*adaptor, 4)
+	adps[0] = kvAdaptor(db)
+	adps[1] = listAdaptor(db)
+	adps[2] = hashAdaptor(db)
+	adps[3] = zsetAdaptor(db)
+	return adps
+}
+
+///////////////////////////////////////////////////////
+
+func TestExpire(t *testing.T) {
 	db := getTestDB()
 	m.Lock()
 	defer m.Unlock()
@@ -77,25 +175,101 @@ func TestKvTTL(t *testing.T) {
 	k := []byte("ttl_a")
 	ek := []byte("ttl_b")
 
-	db.Set(k, []byte("1"))
-	db.Expire(k, 2)
+	dbEntrys := allAdaptors(db)
+	for _, entry := range dbEntrys {
+		ident := entry.showIdent()
 
-	if tRemain, _ := db.TTL(k); tRemain != 2 {
-		t.Fatal(tRemain)
-	}
+		entry.set(k, []byte("1"))
 
-	//	err - check ttl on an inexisting key
-	if tRemain, _ := db.TTL(ek); tRemain != -1 {
-		t.Fatal(tRemain)
-	}
+		if ok, _ := entry.expire(k, 10); ok != 1 {
+			t.Fatal(ident, ok)
+		}
 
-	db.Del(k)
-	if tRemain, _ := db.TTL(k); tRemain != -1 {
-		t.Fatal(tRemain)
+		//	err - expire on an inexisting key
+		if ok, _ := entry.expire(ek, 10); ok != 0 {
+			t.Fatal(ident, ok)
+		}
+
+		//	err - duration is zero
+		if ok, err := entry.expire(k, 0); err == nil || ok != 0 {
+			t.Fatal(ident, fmt.Sprintf("res = %d, err = %s", ok, err))
+		}
+
+		//	err - duration is negative
+		if ok, err := entry.expire(k, -10); err == nil || ok != 0 {
+			t.Fatal(ident, fmt.Sprintf("res = %d, err = %s", ok, err))
+		}
 	}
 }
 
-func TestKvExpCompose(t *testing.T) {
+func TestExpireAt(t *testing.T) {
+	db := getTestDB()
+	m.Lock()
+	defer m.Unlock()
+
+	k := []byte("ttl_a")
+	ek := []byte("ttl_b")
+
+	dbEntrys := allAdaptors(db)
+	for _, entry := range dbEntrys {
+		ident := entry.showIdent()
+		now := time.Now().Unix()
+
+		entry.set(k, []byte("1"))
+
+		if ok, _ := entry.expireAt(k, now+5); ok != 1 {
+			t.Fatal(ident, ok)
+		}
+
+		//	err - expire on an inexisting key
+		if ok, _ := entry.expireAt(ek, now+5); ok != 0 {
+			t.Fatal(ident, ok)
+		}
+
+		//	err - expire with the current time
+		if ok, err := entry.expireAt(k, now); err == nil || ok != 0 {
+			t.Fatal(ident, fmt.Sprintf("res = %d, err = %s", ok, err))
+		}
+
+		//	err - expire with the time before
+		if ok, err := entry.expireAt(k, now-5); err == nil || ok != 0 {
+			t.Fatal(ident, fmt.Sprintf("res = %d, err = %s", ok, err))
+		}
+	}
+}
+
+func TestTTL(t *testing.T) {
+	db := getTestDB()
+	m.Lock()
+	defer m.Unlock()
+
+	k := []byte("ttl_a")
+	ek := []byte("ttl_b")
+
+	dbEntrys := allAdaptors(db)
+	for _, entry := range dbEntrys {
+		ident := entry.showIdent()
+
+		entry.set(k, []byte("1"))
+		entry.expire(k, 2)
+
+		if tRemain, _ := entry.ttl(k); tRemain != 2 {
+			t.Fatal(ident, tRemain)
+		}
+
+		//	err - check ttl on an inexisting key
+		if tRemain, _ := entry.ttl(ek); tRemain != -1 {
+			t.Fatal(ident, tRemain)
+		}
+
+		entry.del(k)
+		if tRemain, _ := entry.ttl(k); tRemain != -1 {
+			t.Fatal(ident, tRemain)
+		}
+	}
+}
+
+func TestExpCompose(t *testing.T) {
 	db := getTestDB()
 	m.Lock()
 	defer m.Unlock()
@@ -104,68 +278,84 @@ func TestKvExpCompose(t *testing.T) {
 	k1 := []byte("ttl_b")
 	k2 := []byte("ttl_c")
 
-	db.Set(k0, k0)
-	db.Set(k1, k1)
-	db.Set(k2, k2)
+	dbEntrys := allAdaptors(db)
 
-	db.Expire(k0, 5)
-	db.Expire(k1, 2)
-	db.Expire(k2, 60)
+	for _, entry := range dbEntrys {
+		ident := entry.showIdent()
 
-	if tRemain, _ := db.TTL(k0); tRemain != 5 {
-		t.Fatal(tRemain)
-	}
-	if tRemain, _ := db.TTL(k1); tRemain != 2 {
-		t.Fatal(tRemain)
-	}
-	if tRemain, _ := db.TTL(k2); tRemain != 60 {
-		t.Fatal(tRemain)
+		entry.set(k0, k0)
+		entry.set(k1, k1)
+		entry.set(k2, k2)
+
+		entry.expire(k0, 5)
+		entry.expire(k1, 2)
+		entry.expire(k2, 60)
+
+		if tRemain, _ := entry.ttl(k0); tRemain != 5 {
+			t.Fatal(ident, tRemain)
+		}
+		if tRemain, _ := entry.ttl(k1); tRemain != 2 {
+			t.Fatal(ident, tRemain)
+		}
+		if tRemain, _ := entry.ttl(k2); tRemain != 60 {
+			t.Fatal(ident, tRemain)
+		}
 	}
 
 	// after 1 sec
 	time.Sleep(1 * time.Second)
-	if tRemain, _ := db.TTL(k0); tRemain != 4 {
-		t.Fatal(tRemain)
-	}
-	if tRemain, _ := db.TTL(k1); tRemain != 1 {
-		t.Fatal(tRemain)
+
+	for _, entry := range dbEntrys {
+		ident := entry.showIdent()
+
+		if tRemain, _ := entry.ttl(k0); tRemain != 4 {
+			t.Fatal(ident, tRemain)
+		}
+		if tRemain, _ := entry.ttl(k1); tRemain != 1 {
+			t.Fatal(ident, tRemain)
+		}
 	}
 
 	// after 2 sec
 	time.Sleep(2 * time.Second)
-	if tRemain, _ := db.TTL(k1); tRemain != -1 {
-		t.Fatal(tRemain)
-	}
-	if v, _ := db.Get(k1); v != nil {
-		t.Fatal(v)
-	}
 
-	if tRemain, _ := db.TTL(k0); tRemain != 2 {
-		t.Fatal(tRemain)
-	}
-	if v, _ := db.Get(k0); v == nil {
-		t.Fatal(v)
-	}
+	for _, entry := range dbEntrys {
+		ident := entry.showIdent()
 
-	// refresh the expiration of key
-	if tRemain, _ := db.TTL(k2); !(0 < tRemain && tRemain < 60) {
-		t.Fatal(tRemain)
-	}
+		if tRemain, _ := entry.ttl(k1); tRemain != -1 {
+			t.Fatal(ident, tRemain)
+		}
+		if exist, _ := entry.exists(k1); exist > 0 {
+			t.Fatal(ident, false)
+		}
 
-	if ok, _ := db.Expire(k2, 100); ok != 1 {
-		t.Fatal(false)
-	}
+		if tRemain, _ := entry.ttl(k0); tRemain != 2 {
+			t.Fatal(ident, tRemain)
+		}
+		if exist, _ := entry.exists(k0); exist <= 0 {
+			t.Fatal(ident, false)
+		}
 
-	if tRemain, _ := db.TTL(k2); tRemain != 100 {
-		t.Fatal(tRemain)
-	}
+		// refresh the expiration of key
+		if tRemain, _ := entry.ttl(k2); !(0 < tRemain && tRemain < 60) {
+			t.Fatal(ident, tRemain)
+		}
 
-	//	expire an inexisting key
-	if ok, _ := db.Expire(k1, 10); ok == 1 {
-		t.Fatal(false)
-	}
-	if tRemain, _ := db.TTL(k1); tRemain != -1 {
-		t.Fatal(tRemain)
+		if ok, _ := entry.expire(k2, 100); ok != 1 {
+			t.Fatal(ident, false)
+		}
+
+		if tRemain, _ := entry.ttl(k2); tRemain != 100 {
+			t.Fatal(ident, tRemain)
+		}
+
+		//	expire an inexisting key
+		if ok, _ := entry.expire(k1, 10); ok == 1 {
+			t.Fatal(ident, false)
+		}
+		if tRemain, _ := entry.ttl(k1); tRemain != -1 {
+			t.Fatal(ident, tRemain)
+		}
 	}
 
 	return