meta db unit tests and fixes

repertory/librepertory/include/db/i_meta_db.hpp

@@ -29,6 +29,8 @@ class i_meta_db {
   INTERFACE_SETUP(i_meta_db);
 
 public:
+  virtual void clear() = 0;
+
   [[nodiscard]] virtual auto get_api_path(const std::string &source_path,
                                           std::string &api_path) const
       -> api_error = 0;

repertory/librepertory/include/db/rdb_meta_db.hpp

@@ -39,6 +39,7 @@ public:
   auto operator=(rdb_meta_db &&) -> rdb_meta_db & = delete;
 
 private:
+  const app_config &cfg_;
   std::unique_ptr<rocksdb::DB> db_{nullptr};
   rocksdb::ColumnFamilyHandle *default_family_{};
   rocksdb::ColumnFamilyHandle *pinned_family_{};
@@ -49,6 +50,8 @@ private:
   [[nodiscard]] auto create_iterator(rocksdb::ColumnFamilyHandle *family) const
       -> std::shared_ptr<rocksdb::Iterator>;
 
+  void create_or_open(bool clear);
+
   [[nodiscard]] auto get_item_meta_json(const std::string &api_path,
                                         json &json_data) const -> api_error;
 
@@ -60,6 +63,8 @@ private:
                                       json json_data) -> api_error;
 
 public:
+  void clear() override;
+
   [[nodiscard]] auto get_api_path(const std::string &source_path,
                                   std::string &api_path) const
       -> api_error override;

repertory/librepertory/include/db/sqlite_meta_db.hpp

@@ -48,6 +48,8 @@ private:
                                       api_meta_map meta) -> api_error;
 
 public:
+  void clear() override;
+
   [[nodiscard]] auto get_api_path(const std::string &source_path,
                                   std::string &api_path) const
       -> api_error override;