using Developpez.Dotnet.Algorithms;
using NUnit.Framework;

namespace Developpez.Dotnet.Tests.Algorithms
{
    [TestFixture]
    public class LevenshteinTests
    {

        [Test]
        public void ComputeDistance_CaseSensitive()
        {
            Assert.AreEqual(3, Levenshtein.ComputeDistance("kitten", "sitting", true));
            Assert.AreEqual(3, Levenshtein.ComputeDistance("Kitten", "Sitting", true));
            Assert.AreEqual(1, Levenshtein.ComputeDistance("kitten", "kittens", true));
            Assert.AreEqual(7, Levenshtein.ComputeDistance("KITTEN", "kittens", true));
            Assert.AreEqual(4, Levenshtein.ComputeDistance("kitTen", "Sitting", true));
            Assert.AreEqual(4, Levenshtein.ComputeDistance("kitTen", "sitting", true));
        }

        [Test]
        public void ComputeDistance_CaseInSensitive()
        {
            Assert.AreEqual(3, Levenshtein.ComputeDistance("kitten", "sitting", false));
            Assert.AreEqual(1, Levenshtein.ComputeDistance("kitten", "kittens", false));
            Assert.AreEqual(1, Levenshtein.ComputeDistance("KITTEN", "kittens", false));
            Assert.AreEqual(3, Levenshtein.ComputeDistance("Kitten", "Sitting", false));
            Assert.AreEqual(3, Levenshtein.ComputeDistance("kitTen", "Sitting", false));
            Assert.AreEqual(3, Levenshtein.ComputeDistance("kitTen", "sitting", false));
        }
        [Test]
        public void ComputeCorrelation_CaseInSensitive()
        {
            Assert.AreEqual(0.5714285714285714d, Levenshtein.ComputeCorrelation("kitten", "sitting", false));
            Assert.AreEqual(0.5714285714285714d, Levenshtein.ComputeCorrelation("Kitten", "Sitting", false));
            Assert.AreEqual(0.5714285714285714d, Levenshtein.ComputeCorrelation("kitTen", "Sitting", false));
            Assert.AreEqual(0, Levenshtein.ComputeCorrelation("kitTen", "dog", false));
            Assert.AreEqual(1, Levenshtein.ComputeCorrelation("Kitten", "KITTEN", false));
        }
        [Test]
        public void ComputeCorrelation_CaseSensitive()
        {
            Assert.AreEqual(0.5714285714285714d, Levenshtein.ComputeCorrelation("kitten", "sitting", true));
            Assert.AreEqual(0.16666666666666663d, Levenshtein.ComputeCorrelation("Kitten", "KITTEN", true));
            Assert.AreEqual(0, Levenshtein.ComputeCorrelation("kitten", "KITTEN", true));
            Assert.AreEqual(0.4285714285714286d, Levenshtein.ComputeCorrelation("kitTen", "Sitting", true));
            Assert.AreEqual(0.4285714285714286d, Levenshtein.ComputeCorrelation("kitTen", "sitting", true));
        }
    }
}