Kellabyte's rewind tests using plain SECTIONs (depends on https://gist.github.com/philsquared/567fdd233d574fe1957d17aff3e5d02c)

rewind-sections.cpp

TEST_CASE("initialize rewind", "[rewind]") {

    int rc;
    MDB_env *env;
    MDB_dbi dbi;
    MDB_txn *txn;

    SECTION("create and open an environment") {
        REQUIRE(SuccessFrom(mdb_env_create(&env)));
        REQUIRE(SuccessFrom(mdb_env_set_mapsize(env, size_t(1048576000))));
        REQUIRE(SuccessFrom(mdb_env_set_maxdbs(env, 1024)));
        REQUIRE(SuccessFrom(mdb_env_open(env, "/tmp", MDB_FIXEDMAP /*|MDB_NOSYNC*/, 0664)));

        SECTION("begin a transaction") {
            REQUIRE(SuccessFrom(mdb_txn_begin(env, NULL, 0, &txn)));
            REQUIRE(SuccessFrom(mdb_dbi_open(txn, NULL, 0, &dbi)));
            REQUIRE(SuccessFrom(mdb_open(txn, NULL, 0, &dbi)));

            SECTION("commit the transaction") {
                REQUIRE(SuccessFrom(mdb_txn_commit(txn)));
            }
        }
    }
    mdb_dbi_close(env, dbi);
    mdb_env_close(env);

}