Method start_testing

tests/oracle/test-oracle.cpp:1574–1583

    }

    bool start_testing() override
    {
        if (!soci::getenv("ORACLE_HOME"))
        {
            fmt::println(stderr, "ORACLE_HOME environment variable must be defined for Oracle tests.");
            return false;
        }

        return test_context_base::start_testing();
    }

    std::string get_backend_name() const override
    {