using NUnit.Framework;

namespace InverseOfLife.Test;

[TestFixture]
public class GeneIndexerTests
{
    [Test]
    public void Indexer_GranularityPositive_ReadWriteBytes()
    {
        var riboseSequence = new byte[] { 0b10101010, 0b11110000, 0b00001111, 0b11001100 };
        var gene = new Gene(3, riboseSequence); 

        byte[] expected = [0b00001111, 0b11001100];
        Assert.That(gene[1], Is.EqualTo(expected));
        
        gene[1] = [0b01010101, 0b10101010];
        Assert.That(gene[1], Is.EqualTo(new byte[] { 0b01010101, 0b10101010 }));
    }

    [Test]
    public void Indexer_GranularityNegative_ReadWriteBits()
    {
        var riboseSequence = new byte[] { 0b10101010, 0b11110000 };
        var gene = new Gene(1, riboseSequence); 

        byte[] expected = [0b00000001];
        Assert.That(gene[7], Is.EqualTo(expected));
        
        gene[7] = [0b00000000];
        Assert.That(gene[7], Is.EqualTo(new byte[] { 0b00000000 }));
    }

    [Test]
    public void Indexer_GranularityExceed_ThrowsException()
    {
        var riboseSequence = new byte[] { 0b10101010, 0b11110000 };
        var gene = new Gene(3, riboseSequence);

        Assert.Throws<ArgumentException>(() =>
        {
            gene[0] = [0b10101010, 0b11110000, 0b00001111];
        });
    }
}