using backend.Pairing;
using FluentAssertions;
using Xunit;

namespace backend.tests;

public class PairingServiceTests
{
    [Fact]
    public void Generated_codes_use_only_safe_alphabet_and_are_8_chars()
    {
        var svc = new PairingService();
        for (var i = 0; i < 50; i++)
        {
            var code = svc.GenerateCode();
            code.Length.Should().Be(8);
            code.Should().MatchRegex("^[A-HJ-KM-NP-Z2-9]+$");
        }
    }

    [Fact]
    public void Generated_codes_are_not_all_identical()
    {
        var svc = new PairingService();
        var codes = Enumerable.Range(0, 20).Select(_ => svc.GenerateCode()).ToHashSet();
        codes.Count.Should().BeGreaterThan(15);
    }
}