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using System;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using System.Linq;
using LINQ;


namespace UnitTestProject1
{
    [TestClass]
    public class UnitTestForMedian
    {
        [TestMethod]
        public void zeroArguments()
        {
            var t = new double[] { }.Median();
            Assert.AreEqual(double.NaN, t);
        }

        [TestMethod]
        public void OneArgument()
        {
            var t = new double[] {1}.Median();
            Assert.AreEqual(1, t);
        }

        [TestMethod]
        public void anEvenNumber()
        {
            var t = new double[] { 4, 2, 1, 3 }.Median();
            Assert.AreEqual(2.5, t);
        }

        [TestMethod]
        public void anOddNumber()
        {
            var t = new double[] { 6, 2, 0, 1, 10 }.Median();
            Assert.AreEqual(2, t);
        }
    }
    [TestClass]
    public class UnitTestForBigrams
    {
        [TestMethod]
        public void nullArgument()
        {
            var t = new double[] { }.GetBigrams();
            Assert.AreEqual(null, t);
        }
        [TestMethod]
        public void manyArguments()
        {
            var t = new double[] {1, 2, 3}.GetBigrams();
            Assert.AreEqual(Tuple.Create<double, double>(1, 2), t.First());
            Assert.AreEqual(Tuple.Create<double, double>(2, 3), t.Last());
        }
    }
}