public void MostProfitableAccount_TwentyTransactionsInInput()
        {
            //arrange
            TransactionProcessor transactionProcessor = new TransactionProcessor(transactions);

            //act
            TransactionsStatistics statistics = transactionProcessor.MostProfitableAccount(2020);

            //assert
            Assert.AreEqual("Account1", statistics.Account);
            Assert.AreEqual(10000, statistics.Amount);
        }