SOCI tests using CATCH testing framework live here.

Currently one test is built for each backend, i.e. there are soci_oracle_test, soci_postgresql_test, soci_sqlite3_test and so on and for ODBC backend there are multiple versions of the test depending on the ODBC driver used. Each of these tests can be run with a single parameter describing the database to use for testing in the backend-specific way as well as any of the standard CATCH command line options.