using System.Text;
using FluentAssertions;
using StellaOps.Replay.Core;
using Xunit;

namespace StellaOps.Replay.Core.Tests;

public sealed class DeterministicHashTests
{
    [Fact]
    public void Sha256Hex_ComputesLowercaseDigest()
    {
        var digest = DeterministicHash.Sha256Hex("replay-core");

        digest.Should().Be("a914f5ac6a57aab0189bb55bcb0ef6bcdbd86f77198c8669eab5ae38a325e41d");
    }

    [Fact]
    public void MerkleRootHex_IsDeterministic()
    {
        var leaves = new[] { "alpha", "beta", "gamma" }
            .Select(Encoding.UTF8.GetBytes)
            .ToList();

        var root = DeterministicHash.MerkleRootHex(leaves);

        root.Should().Be("50298939464ed02cbf2b587250a55746b3422e133ac4f09b7e2b07869023bc9e");
        DeterministicHash.MerkleRootHex(leaves).Should().Be(root);
    }
}