The old version is a result of copy-paste and is wrong.
namespace auth {
namespace unittest {
-// Here we define utility modules for the convenience of tests that create
-// a data source client according to the specified conditions.
-
-/// \brief Create an SQLite3 data source client from a stream.
+/// \brief Create an SQLite3 database file for a given zone from a stream.
///
/// This function creates an SQLite3 DB file for the specified zone
/// with specified content. The zone will be created in the given