//-----------------------------------------------------------------------
// <copyright file="UpliftFactorToBetaCalculator.cs" company="Deltares">
//  Copyright (c) 2011 Deltares. All rights reserved.
// </copyright>
// <author>B.S.T. The</author>
// <email>tom.the@deltares.nl</email>
// <date>06-01-2011</date>
// <summary>Test for calculator of probability of uplift</summary>
//-----------------------------------------------------------------------
namespace Deltares.Dam.Tests
{
    using Deltares.Dam.Data;
    using NUnit.Framework;

    [TestFixture]
    public class UpliftFactorToBetaCalculatorTest
    {
        private const double CTolerance = 0.0001;
        private const double CBetaMax = 18.0;
        private const double CBetaMin = -10.8;

        [Test]
        public void UpliftFactorsBelowLowerBoundaryComputedCorrectly()
        {
            Assert.AreEqual(CBetaMin, UpliftFactorToBetaCalculator.ComputeBetaFromUpliftFactor(0.4), CTolerance);
            Assert.IsTrue(UpliftFactorToBetaCalculator.ComputeBetaFromUpliftFactor(0.2) < CBetaMin);
            Assert.IsTrue(UpliftFactorToBetaCalculator.ComputeBetaFromUpliftFactor(0.0) < CBetaMin);
        }

        [Test]
        public void UpliftFactorsAboveUpperBoundaryComputedCorrectly()
        {
            Assert.AreEqual(CBetaMax, UpliftFactorToBetaCalculator.ComputeBetaFromUpliftFactor(2.0), CTolerance);
            Assert.IsTrue(UpliftFactorToBetaCalculator.ComputeBetaFromUpliftFactor(3.0) > CBetaMax);
        }

        [Test]
        public void UpliftFactorsWithinNormalRangeComputedCorrectly()
        {
            Assert.AreEqual(-7.2, UpliftFactorToBetaCalculator.ComputeBetaFromUpliftFactor(0.6), CTolerance);
            Assert.AreEqual(-3.6, UpliftFactorToBetaCalculator.ComputeBetaFromUpliftFactor(0.8), CTolerance);
            Assert.AreEqual(-1.8, UpliftFactorToBetaCalculator.ComputeBetaFromUpliftFactor(0.9), CTolerance);
            Assert.AreEqual(-0.36, UpliftFactorToBetaCalculator.ComputeBetaFromUpliftFactor(0.98), CTolerance);
            Assert.AreEqual(0.0, UpliftFactorToBetaCalculator.ComputeBetaFromUpliftFactor(1.0), CTolerance);
            Assert.AreEqual(1.8, UpliftFactorToBetaCalculator.ComputeBetaFromUpliftFactor(1.1), CTolerance);
            Assert.AreEqual(3.6, UpliftFactorToBetaCalculator.ComputeBetaFromUpliftFactor(1.2), CTolerance);
            Assert.AreEqual(14.4, UpliftFactorToBetaCalculator.ComputeBetaFromUpliftFactor(1.8), CTolerance);
        }

        [Test]
        [ExpectedException(typeof(UpliftFactorToBetaCalculatorException))]
        public void UpliftFactorLessThanZeroRaisesException()
        {
            UpliftFactorToBetaCalculator.ComputeBetaFromUpliftFactor(-1.0);
        }
    }
}