using System;
using System.Collections.Generic;
using DotRecast.Core.Buffers;
using NUnit.Framework;

namespace DotRecast.Core.Test;

public class RcRentedArrayTest
{
    public List<int> RandomValues(int length)
    {
        var rand = new RcRand();

        // excepted values
        var list = new List<int>();
        for (int i = 0; i < length; ++i)
        {
            list.Add(rand.NextInt32());
        }

        return list;
    }

    [Test]
    public void Test()
    {
        var rand = new RcRand();
        for (int loop = 0; loop < 1024; ++loop)
        {
            int length = (int)(rand.Next() * 2048);
            var values = RandomValues(length);
            using var array = RcRentedArray.RentDisposableArray<int>(length);

            for (int i = 0; i < array.Length; ++i)
            {
                array[i] = values[i];
            }

            for (int i = 0; i < array.Length; ++i)
            {
                Assert.That(array[i], Is.EqualTo(values[i]));
            }
            
            Assert.That(array[^1], Is.EqualTo(values[^1]));
            
            Assert.Throws<IndexOutOfRangeException>(() => array[-1] = 0);
            Assert.Throws<IndexOutOfRangeException>(() => array[array.Length + 1] = 0);
            Assert.Throws<IndexOutOfRangeException>(() => _ = array[-1]);
            Assert.Throws<IndexOutOfRangeException>(() => _ = array[array.Length + 1]);
        }
    }
}