The implementation is very straightforward, as follows:

private MongoCollection mongoCollection; 
protected MongoCollection getMongoCollection() { 
  return mongoCollection; 
}
public TicTacToeCollection() throws UnknownHostException { 
  DB db = new MongoClient().getDB("tic-tac-toe"); 
  mongoCollection = new Jongo(db).getCollection("bla"); 
} 

When instantiating the TicTacToeCollection class, we're creating a new MongoCollection with the specified DB name (tic-tac-toe) and assigning it to the local variable.

Bear with us. There's only one more specification left until we get to the interesting part where we'll use mocks and spies.