public async Task GetByAccountId_ReturnTransactionViewModelTestAsync()
{
var transactions = TransactionMock.TransactionModelFaker.Generate(3);
_accountRepositoryMock.Setup(x => x.GetTransactionsByAccountId(transactions.FirstOrDefault().AccountId))
.ReturnsAsync(transactions);
_mapperMock.Setup(x =>
x.Map <IEnumerable <TransactionViewModel> >(It.IsAny <IEnumerable <Transaction> >()))
.Returns(TransactionMock.TransactionViewModelModelFaker.Generate(3));
var accountAppService = new AccountAppService(_accountRepositoryMock.Object,
_mapperMock.Object, _transactionServiceMock.Object, _domainNotificationMock.Object);
var accountMethod = await accountAppService.GetByAccountId(transactions.FirstOrDefault().AccountId);
var accountResult = Assert.IsAssignableFrom <IEnumerable <TransactionViewModel> >(accountMethod);
Assert.NotNull(accountResult);
Assert.NotEmpty(accountResult);
}