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

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

            //assert
            Assert.AreEqual(-4000, statistics.Amount);
            Assert.AreEqual(7, statistics.Month);
        }