public void Should_GenerateCorrectId_When_DbIsEmptyOrFilled()
        {
            Assert.IsTrue(mongoHandler.GenerateNewId().Result == 1);

            string       word = "Test";
            CardDocument card = CardDocument.CreateBasedOnWordAsync(mongoHandler, word).Result;

            mongoHandler.InsertCard(card);

            Assert.IsTrue(mongoHandler.GenerateNewId().Result == 2);
        }