diff --git a/ledis/ledis_test.go b/ledis/ledis_test.go
index 51e4d0d..a0c9879 100644
--- a/ledis/ledis_test.go
+++ b/ledis/ledis_test.go
@@ -37,24 +37,85 @@ func TestDB(t *testing.T) {
 func TestSelect(t *testing.T) {
 	db0, _ := testLedis.Select(0)
 	db1, _ := testLedis.Select(1)
+	db1024, _ := testLedis.Select(1024)
 
-	key0 := []byte("db0_test_key")
-	key1 := []byte("db1_test_key")
+	testSelect(t, db0)
+	testSelect(t, db1)
+	testSelect(t, db1024)
+}
 
-	db0.Set(key0, []byte("0"))
-	db1.Set(key1, []byte("1"))
-
-	if v, err := db0.Get(key0); err != nil {
+func testSelect(t *testing.T, db *DB) {
+	key := []byte("test_select_key")
+	value := []byte("value")
+	if err := db.Set(key, value); err != nil {
 		t.Fatal(err)
-	} else if string(v) != "0" {
+	}
+
+	if v, err := db.Get(key); err != nil {
+		t.Fatal(err)
+	} else if string(v) != string(value) {
 		t.Fatal(string(v))
 	}
 
-	if v, err := db1.Get(key1); err != nil {
+	if _, err := db.Expire(key, 100); err != nil {
 		t.Fatal(err)
-	} else if string(v) != "1" {
+	}
+
+	if _, err := db.TTL(key); err != nil {
+		t.Fatal(err)
+	}
+
+	if _, err := db.Persist(key); err != nil {
+		t.Fatal(err)
+	}
+
+	key = []byte("test_select_list_key")
+	if _, err := db.LPush(key, value); err != nil {
+		t.Fatal(err)
+	}
+
+	if _, err := db.LRange(key, 0, 100); err != nil {
+		t.Fatal(err)
+	}
+
+	if v, err := db.LPop(key); err != nil {
+		t.Fatal(err)
+	} else if string(v) != string(value) {
 		t.Fatal(string(v))
 	}
+
+	key = []byte("test_select_hash_key")
+	if _, err := db.HSet(key, []byte("a"), value); err != nil {
+		t.Fatal(err)
+	}
+
+	if v, err := db.HGet(key, []byte("a")); err != nil {
+		t.Fatal(err)
+	} else if string(v) != string(value) {
+		t.Fatal(string(v))
+	}
+
+	key = []byte("test_select_set_key")
+	if _, err := db.SAdd(key, []byte("a"), []byte("b")); err != nil {
+		t.Fatal(err)
+	}
+
+	if n, err := db.SIsMember(key, []byte("a")); err != nil {
+		t.Fatal(err)
+	} else if n != 1 {
+		t.Fatal(n)
+	}
+
+	key = []byte("test_select_zset_key")
+	if _, err := db.ZAdd(key, ScorePair{1, []byte("a")}, ScorePair{2, []byte("b")}); err != nil {
+		t.Fatal(err)
+	}
+
+	if v, err := db.ZRangeByScore(key, 0, 100, 0, -1); err != nil {
+		t.Fatal(err)
+	} else if len(v) != 2 {
+		t.Fatal(len(v))
+	}
 }
 
 func TestFlush(t *testing.T) {