Roslyn CTP: Three Introductory Projects

using CodeGenerator;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using System;
using System.Collections.Generic;
using System.Linq;

namespace CodeGeneratorTest
{
    
    
    /// <summary>
    ///This is a test class for EnumerableExtensionsTest and is intended
    ///to contain all EnumerableExtensionsTest Unit Tests
    ///</summary>
    [TestClass()]
    public class EnumerableExtensionsTest {


        private TestContext testContextInstance;

        /// <summary>
        ///Gets or sets the test context which provides
        ///information about and functionality for the current test run.
        ///</summary>
        public TestContext TestContext {
            get {
                return testContextInstance;
            }
            set {
                testContextInstance = value;
            }
        }

        #region Additional test attributes
        // 
        //You can use the following additional attributes as you write your tests:
        //
        //Use ClassInitialize to run code before running the first test in the class
        //[ClassInitialize()]
        //public static void MyClassInitialize(TestContext testContext)
        //{
        //}
        //
        //Use ClassCleanup to run code after all tests in a class have run
        //[ClassCleanup()]
        //public static void MyClassCleanup()
        //{
        //}
        //
        //Use TestInitialize to run code before running each test
        //[TestInitialize()]
        //public void MyTestInitialize()
        //{
        //}
        //
        //Use TestCleanup to run code after each test has run
        //[TestCleanup()]
        //public void MyTestCleanup()
        //{
        //}
        //
        #endregion

        [TestMethod()]
        public void CodeGeneratorTest() {
            var vehicles = new HashSet<Vehicle> { 
                new Car() { Speed = 160 }, new Car() { Speed = 120 }, new Car() { Speed = 230 },
                new Ship { Speed = 80 }, new Ship() { Speed = 60 }, new Ship() { Speed = 110 },
                new Plane { Speed = 420 }, new Plane() { Speed = 840 }, new Plane() { Speed = 720 }
            };

            Assert.AreEqual(vehicles.Average((Car c) => c.Speed),
                            vehicles.OfType<Car>().Average(c => c.Speed));

            Assert.AreEqual(vehicles.First((Car c) => c.Speed < 150),
                            vehicles.OfType<Car>().First(c => c.Speed < 150));

            Assert.AreEqual(vehicles.All((Ship s) => s.Speed < 100),
                            vehicles.OfType<Ship>().All(s => s.Speed < 100));

            Assert.IsTrue(Enumerable.SequenceEqual(
                            vehicles.Select((Ship s) => s.Speed),
                            vehicles.OfType<Ship>().Select(s => s.Speed)));

            Assert.IsTrue(Enumerable.SequenceEqual(
                            vehicles.SkipWhile((Plane p) => p.Speed < 500),
                            vehicles.OfType<Plane>().SkipWhile(p => p.Speed < 500)));

            Assert.IsTrue(Enumerable.SequenceEqual(
                            vehicles.OrderBy((Plane p) => p.Speed),
                            vehicles.OfType<Plane>().OrderBy(p => p.Speed)));
        }


        abstract class Vehicle {
            public double Speed;
        }

        class Car : Vehicle { }
        class Ship : Vehicle { }
        class Plane : Vehicle { }
    }
}