finally methods that actually do something, some testing of them

src/exceptions.h

@@ -76,6 +76,27 @@ private:
     std::optional<std::string> tableName;
 };
 
+/**
+ * \brief Thrown if the cursor was operated in closed state
+ */
+class CursorNotReady : public Exception {
+public:
+    /**
+     * \brief Creates exception
+     *
+     * \param operation - text name of the method that was called on closed cursor
+     * \param dbName    - name of the database
+     * \param tableName - name of the storage owning the cursor
+     */
+    CursorNotReady(const std::string& operation, const std::string& dbName, const std::string& tableName);
+
+    std::string getMessage() const;
+private:
+    std::string operation;
+    std::string dbName;
+    std::string tableName;
+};
+
 /**
  * \brief Thrown if something in the database was called on opened state and it is not supported
  */