public void GetBalanceTest()
{
const string inputResult = "1000";
var accountServiceMock = new Mock<IAccountService>();
accountServiceMock.Setup(ser => ser.GetBalance(1)).Returns(inputResult);
var controller = new TransactionController(accountServiceMock.Object);
var outputResult = controller.GetBalance(1);
Assert.AreSame(inputResult, outputResult, "Output result is not same as input");
}
