add mongo

db_test.go

@@ -72,6 +72,26 @@ func TestImplementations(t *testing.T) {
 		cases = append(cases, riak)
 	}
 
+	mongoLN, err := net.Listen("tcp", "localhost:27017")
+	if err == nil {
+		defer mongoLN.Close()
+		go func() {
+			for {
+				conn, err := mongoLN.Accept()
+				if err == nil {
+					conn.Close()
+				}
+			}
+		}()
+	}
+	if mongo1, err := NewMongo("localhost:27017"); err == nil {
+		cases = append(cases, mongo1)
+	} else if mongo2, err := NewMongo("localhost:27017", "root", "pass"); err == nil {
+		cases = append(cases, mongo2)
+	} else {
+		t.Errorf("cannot make mongo: %v", err)
+	}
+
 	validKey := "key"
 	validValue := []byte("value")