make map driver type for faster tests

storage/driver/driver.go

@@ -9,6 +9,7 @@ import (
 )
 
 type Driver interface {
+	Count(context.Context, string, interface{}) (int, error)
 	Find(context.Context, string, interface{}) (chan bson.Raw, error)
 	Update(context.Context, string, interface{}, interface{}) error
 	Insert(context.Context, string, interface{}) error
@@ -20,6 +21,8 @@ func New(path ...string) Driver {
 		path = []string{config.New().DBURI}
 	}
 	switch strings.ToLower(config.New().DriverType) {
+	case "map":
+		return NewMap()
 	case "mongo":
 		return NewMongo(path[0])
 	case "boltdb":