using Microsoft.VisualStudio.TestTools.UnitTesting;
using SyncEngine.Sync;

namespace SyncEngine.Tests
{
    [TestClass]
    public class ChangeDetectorTests
    {
        [TestMethod]
        public void ComputeRowHash_IsStableForSameValues()
        {
            var a = ChangeDetector.ComputeRowHash(new object[] { "A", 1, null });
            var b = ChangeDetector.ComputeRowHash(new object[] { "A", 1, null });
            Assert.AreEqual(a, b);
        }

        [TestMethod]
        public void ComputeRowHash_ChangesWhenValueChanges()
        {
            var a = ChangeDetector.ComputeRowHash(new object[] { "A" });
            var b = ChangeDetector.ComputeRowHash(new object[] { "B" });
            Assert.AreNotEqual(a, b);
        }

        [TestMethod]
        public void Normalize_TrimsWhitespace()
        {
            Assert.AreEqual("x", ChangeDetector.Normalize("  x  "));
        }

        [TestMethod]
        public void Normalize_DecimalUsesInvariantCulture()
        {
            Assert.AreEqual("12.5", ChangeDetector.Normalize(12.5m));
        }
    }
}