using System;
using System.Collections.Generic;
using System.Text;
using UnitTestSharp;
using Sunweaver.Commands.Abstracts;

namespace Sunweaver.UnitTests.Commands.Abstracts
{
    
    public class BinaryOperationTests : TestFixture
    {
        class BinaryOperationTester : BinaryOperation
        {
            public long A=0, B=0;
            public override void  Operation(long a, long b)
            {
 	            A = a;
                B = b;
            }

            public override void CompileOperation(
                System.Reflection.Emit.ILGenerator il,
                DataPrototypes.Locals locals)
            {
                // Pass
            }
        }

        
        public override void TestSetup()
        {
            VM = new Sunweaver.DataPrototypes.VirtualMachine();
        }

        BinaryOperationTester bp = new BinaryOperationTester();
        Sunweaver.DataPrototypes.VirtualMachine VM;

        
        public void DecreasesStackDepthBy2()
        {
            
            VM.Stack.Push(10);
            VM.Stack.Push(20);

            bp.Implementation(VM);

            CheckEqual(0, VM.Stack.Count());
        }

        
        public void FizzlesWhenEmpty()
        {
            
            bp.A = 100;
            bp.B = 200;

            bp.Implementation(VM);

            CheckEqual(0, VM.Stack.Count());
            CheckEqual((long)100, bp.A);
            CheckEqual((long)200, bp.B);
        }

        
        public void FizzlesWhenAlmostEmpty()
        {
            
            VM.Stack.Push(45);

            bp.A = 100;
            bp.B = 200;
            
            bp.Implementation(VM);

            CheckEqual(1, VM.Stack.Count());
            CheckEqual(45, VM.Stack.Pop());
            CheckEqual((long)100, bp.A);
            CheckEqual((long)200, bp.B);
        }

        
        public void PullsStackValuesInRightOrderAndCorrectly()
        {
            
            VM.Stack.Push(1);
            VM.Stack.Push(2);

            bp.Implementation(VM);

            CheckEqual((long)1, bp.A);
            CheckEqual((long)2, bp.B);
        }

    }
}