public async Task WhenAmountCreditedSetAccountBalanceMoreThanPreviousBalance() { //Arrange TransactionDto transactionDto = new() { TransactionAmount = 1000, TransactionTypeId = 1, AccountId = 1 }; Transaction transaction = new() { TransactionId = 5, TransactionAmount = 2000, AccountBalance = 3000, AccountId = 1 }; Mock <ITransactionRepository> mockTransactionRepository = new(); mockTransactionRepository.Setup(f => f.GetLatestTransactionAsync(transactionDto.AccountId)).Returns(Task.FromResult(transaction)); Mock <ITransactionCurrencyConverterService> mockTransactionCurrencyConverterService = new(); TransactionLogic transactionLogic = new TransactionLogic(mockTransactionRepository.Object, mockTransactionCurrencyConverterService.Object); //Act var result = await transactionLogic.SetAccountBalanceForCreditAndDebit(transactionDto); //Assert Assert.AreEqual(4000, transactionDto.AccountBalance); Assert.AreEqual(result, true); } [TestMethod]