public void TransferAmountBetweenUsers()
{
var context = serviceProvider.GetRequiredService <DataContext>();
var controller = new BankAccountsController(context);
context.BankAccount.Add(bankAccount1);
context.BankAccount.Add(bankAccount2);
context.SaveChanges();
double initialBalanceBankAccount1 = bankAccount1.Balance;
double initialBalanceBankAccount2 = bankAccount2.Balance;
string amount = "10";
List <string> transferData = new List <string> {
"10", bankAccount1.UserId.ToString(), bankAccount2.UserId.ToString()
};
var transferResult = controller.TransferBetweenUsers(transferData);
Assert.Equal(initialBalanceBankAccount1 - Single.Parse(amount), bankAccount1.Balance - Single.Parse(amount));
Assert.Equal(initialBalanceBankAccount2 + Single.Parse(amount), bankAccount2.Balance + Single.Parse(amount));
}