allow dest handler to handle folder destinations

unittests/mocks/FilesystemMock.cpp

@@ -138,3 +138,10 @@ ReturnValue_t FilesystemMock::truncateFile(FilesystemParams params) {
   truncateCalledOnFile = params.path;
   return returnvalue::OK;
 }
+
+ReturnValue_t FilesystemMock::getBaseFilename(FilesystemParams params, char *nameBuf, size_t maxLen,
+                                              size_t &baseNameLen) {
+  return returnvalue::OK;
+}
+
+bool FilesystemMock::isDirectory(const char *path) { return false; }