static void Main(string[] args)
{
var input = Console.ReadLine();
while (input != "exit")
{
var op5 = new PowerOperation();
var op4 = new DivideOperation(op5);
var op3 = new MultiplyOperation(op4);
var op2 = new SubstractOperation(op3);
var op1 = new AddOperation(op2);
Command command;
try
{
command = new Command(input);
}
catch (Exception e)
{
Console.WriteLine(e);
throw;
}
var result = op1.Calculate(command);
Console.Write(result == null
? $"Operation {command.Operation} is not supported"
: $"{command} = {result} \n");
input = Console.ReadLine();
}
}
public void CalculateTest()
{
var operation = new AddOperation
{
A = 2,
B = 4
};
operation.Calculate();
Assert.IsTrue(operation.Result != null);
Assert.IsTrue(operation.Result.Value == 6);
}