test.js

var tx;
try {
  tx = database.beginTx();
  var homer = database.createNode();
  var marge = database.createNode();
  
  var wedding = inTransaction(tx, function() {
    var married = homer.createRelationshipTo(marge, 'MARRIED_WITH');
    tx.success();
  });
  setTimeout(wedding, 3000);
}
finally {
  tx.finish(); 
}

// where

function inTransaction(tx, f) {
  tx.incrementReferenceCount();
  return function() {
    tx.resume(); // rebinds the transaction to the current thread
    try {
      f();
    }
    finally {
      tx.finish();
    }
  };
}