using System;
using NUnit.Framework;
using SVSim.BattleEngine.Rng;

namespace SVSim.BattleEngine.Tests
{
    [TestFixture]
    public class RngSeamTests
    {
        // RandomSourceBridge.Range must mirror the engine's exact roll arithmetic:
        // BattleManagerBase.StableRandom does `(int)Math.Floor((double)val * unit)`.
        [Test]
        public void Bridge_Range_mirrors_engine_floor_arithmetic()
        {
            Assert.That(RandomSourceBridge.Range(7, 0.0), Is.EqualTo(0));   // floor(7*0)   = 0
            Assert.That(RandomSourceBridge.Range(7, 0.999), Is.EqualTo(6)); // floor(6.993) = 6 (never == val)
            Assert.That(RandomSourceBridge.Range(3, 0.5), Is.EqualTo(1));   // floor(1.5)   = 1 (middle of 3)
            Assert.That(RandomSourceBridge.Range(1, 0.5), Is.EqualTo(0));   // floor(0.5)   = 0
        }
    }
}