static void Main(string[] args)
{
// Represent an operation to be performed on the elements of an object structure.
// Visitor lets you define a new operation without changing the classes of the elements on which it operates.
var person = new Person();
person.Assets.Add(new BankAccount {
Amount = 1000, MonthlyInterest = 0.01
});
person.Assets.Add(new BankAccount {
Amount = 2000, MonthlyInterest = 0.02
});
person.Assets.Add(new RealEstate {
EstimatedValue = 79000, MonthlyRent = 500
});
person.Assets.Add(new Loan {
Owed = 40000, MonthlyPayment = 40
});
var networth = new NetworthVisitor();
person.Accept(networth);
Console.WriteLine($"Networth: ${networth.Total}");
var monthlyIncome = new MonthlyIncomeVisitor();
person.Accept(monthlyIncome);
Console.WriteLine($"Monthly income: ${monthlyIncome.Total}");
Console.ReadKey();
}
public void Calculate_Monthly_Income()
{
var person = new Person();
person.Assets.Add(new BankAccount {
Amount = 1000, InterestRate = 0.05m
});
person.Assets.Add(new BankAccount {
Amount = 2000, InterestRate = 0.1m
});
person.Assets.Add(new RealEstate {
EstimatedValue = 79000, MonthlyRent = 2000
});
person.Assets.Add(new Loan {
Owed = 40000, MonthlyPayment = 100
});
var incomeVisitor = new MonthlyIncomeVisitor();
person.Accept(incomeVisitor);
Assert.Equal(1920.84m, incomeVisitor.Amount);
}
