using System;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using Be.Timvw.Framework.Domain;

namespace Be.Timvw.Framework.Tests.Domain
{
    [TestClass]
    public class EffectivityTester
    {
        #region Constructor Tests

        [TestMethod]
        public void TestConstructor()
        {
            string name = "me";
            DateTime begin = new DateTime(2000, 1, 1);
            DateTime end = new DateTime(2000, 12, 31);
            IRange<DateTime> validityPeriod = new Range<DateTime>(begin, end);

            IEffectivity<string> effectivity = new Effectivity<string>(name, validityPeriod);
            Assert.AreEqual(name, effectivity.Element);
            Assert.AreEqual(validityPeriod, effectivity.ValidityPeriod);
        }

        #endregion

        #region IsEffectiveOn Tests

        [TestMethod]
        public void TestIsEffectiveOnInValidityPeriod()
        {
            IEffectivity<string> effectivity = GetEffectivityForYear2000();
            DateTime validityDate = new DateTime(2000, 1, 1);

            Assert.IsTrue(effectivity.IsEffectiveOn(validityDate));
        }

        [TestMethod]
        public void TestIsEffectiveOnOutValidityPeriod()
        {
            IEffectivity<string> effectivity = GetEffectivityForYear2000();
            DateTime validityDate = new DateTime(1999, 1, 1);

            Assert.IsFalse(effectivity.IsEffectiveOn(validityDate));
        }

        #endregion

        #region CompareTo Tests

        [TestMethod]
        public void TestCompareToSameEffectivities()
        {
            IEffectivity<string> effectivity = GetEffectivityForYear2000();
            IEffectivity<string> sameEffectivity = GetEffectivityForYear2000();

            Assert.AreEqual(0, effectivity.CompareTo(sameEffectivity));
        }

        [TestMethod]
        public void TestCompareToDifferentPeriods()
        {
            IEffectivity<string> effectivity = GetEffectivityForYear2000();
            string name = effectivity.Element;
            DateTime begin = effectivity.ValidityPeriod.Begin.AddDays(-1);
            DateTime end = new DateTime(2000, 12, 31);
            IRange<DateTime> validityPeriod = new Range<DateTime>(begin, end);
            IEffectivity<string> otherEffectivity = new Effectivity<string>(name, validityPeriod);

            Assert.AreEqual(1, effectivity.CompareTo(otherEffectivity));
        }

        [TestMethod]
        public void TestCompareToDifferentElements()
        {
            IEffectivity<string> effectivity = GetEffectivityForYear2000();
            string name = string.Format("Other{0}", effectivity.Element);
            IRange<DateTime> validityPeriod = effectivity.ValidityPeriod;
            IEffectivity<string> otherEffectivity = new Effectivity<string>(name, validityPeriod);

            Assert.AreEqual(-1, effectivity.CompareTo(otherEffectivity));
        }

        #endregion

        #region Private Members

        private static IEffectivity<string> GetEffectivityForYear2000()
        {
            string name = "me";
            DateTime begin = new DateTime(2000, 1, 1);
            DateTime end = new DateTime(2000, 12, 31);
            IRange<DateTime> validityPeriod = new Range<DateTime>(begin, end);

            return new Effectivity<string>(name, validityPeriod);
        }

        #endregion
    }
}