text: #include "test.h"
  
  bool testcase_try::run() {
    db_open();
    assert(!txn_guard);
  
    MDBX_txn *txn = nullptr;
    MDBX_txn *txn2 = nullptr;
    int rc = mdbx_txn_begin(db_guard.get(), nullptr, MDBX_TXN_READWRITE, &txn);
    if (unlikely(rc != MDBX_SUCCESS))
      failure_perror("mdbx_txn_begin(MDBX_TXN_TRY)", rc);
    else {
      rc = mdbx_txn_begin(db_guard.get(), nullptr, MDBX_TXN_TRY, &txn2);
      if (unlikely(rc != MDBX_BUSY))
        failure_perror("mdbx_txn_begin(MDBX_TXN_TRY)", rc);
    }
  
    txn_guard.reset(txn);
    return true;
  }
  