using System;
using System.Threading;
using Developpez.Dotnet.Diagnostics;
using NUnit.Framework;

namespace Developpez.Dotnet.Tests.Diagnostics
{
    [TestFixture]
    public class AutoStopwatchTests
    {
        [Test]
        public void Test_AutoStopWatch_NoAction()
        {
            using (var asw = new AutoStopwatch())
            {
                Thread.Sleep(100);
                asw.Stop();
                Assert.GreaterOrEqual(asw.ElapsedMilliseconds, 0);
            }
        }
        
        [Test]
        public void Test_AutoStopWatch_ActionIsCalled()
        {
            bool wasCalled = false;
            using (new AutoStopwatch(ts => wasCalled = true))
            {
            }
            Assert.IsTrue(wasCalled);
        }

        [Test]
        public void Test_AutoStopWatch_ActionIsCalledOnlyOnce()
        {
            int nbCalls = 0;
            using (var asw = new AutoStopwatch(ts => nbCalls++))
            {
                (asw as IDisposable).Dispose(); // Disposed
            } // Disposed again...

            Assert.IsTrue(nbCalls == 1);
        }
    }
}