using Nonemm.Core;

namespace Nonemm.Spotting.Tests;

public class SpotJitterTests
{
    private static Spot At(double kilohertz) =>
        new(Callsign.Parse("OM5M"), Frequency.FromKilohertz(kilohertz), DateTime.UtcNow, SpotSource.Cluster);

    [Fact]
    public void ACwSpotMovesByThirtyOrSixtyHertz()
    {
        Random random = new(1);
        for (int run = 0; run < 20; run++)
        {
            Spot moved = SpotJitter.Shifted(At(14_025), BandPlan.Default, random);
            long offset = moved.Frequency.Hertz - 14_025_000;
            Assert.Contains(offset, (long[])[-60, -30, 30, 60]);
        }
    }

    [Fact]
    public void APhoneSpotIsLeftWhereItIs()
    {
        Spot spot = At(14_250);
        Assert.Equal(spot, SpotJitter.Shifted(spot, BandPlan.Default, new Random(1)));
    }
}