public void GetById_on_success()
{
//Arrange
var checkingAccount = new CheckingAccount();
var id = 1;
_checkingAccountServiceMock.FindById(id).Returns(checkingAccount);
//Act
var result = _checkingAccountController.GetById(id);
var okResult = result.Result as OkObjectResult;
//Assert
Assert.IsType <OkObjectResult>(result.Result);
Assert.IsType <CheckingAccount>(okResult.Value);
}