JayBazuzi

using System;
using Microsoft.Build.Construction;

public static class ProjectRootElementExtensions
{
    public static void AddUsingTask<TTask>(this ProjectRootElement projectRootElement)
    {
        Type taskType = typeof(TTask);
        projectRootElement
            .AddUsingTask(taskType.Name, taskType.Assembly.Location, null);

JayBazuzi

            var projectRootElement = ProjectRootElement.Create();

            projectRootElement
                .AddTarget("Build")
                    .AddTask<MyTask>()
                        .SetParameter("Foo", "hi");

            var highImportanceStringLogger = new HighImportanceStringLogger();

            var success = new ProjectInstance(projectRootElement).Build(new[] { highImportanceStringLogger });

JayBazuzi

    public abstract class LoggingTask : Task
    {
        protected void LogInputs()
        {
            Log.LogMessage(MessageImportance.High, "Inputs:");

            foreach (var propertyInfo in GetInputProperties())
            {
                LogProperty(propertyInfo);
            }

JayBazuzi

        public class TaskWithRequiredInput : LoggingTask
        {
            [Required]
            public string Foo { get; set; }

            public override bool Execute()
            {
                LogInputs();
                return true;
            }

JayBazuzi

    public static class PropertyInfoExtensions
    {
        public static bool HasAttribute<TAttribute>(this PropertyInfo propertyInfo)
            where TAttribute : Attribute
        {
            return propertyInfo.GetCustomAttribute<TAttribute>() != null;
        }
    }

JayBazuzi

        [TestMethod]
        public void RequiredInputGetsLogged()
        {
            var buildTarget = CreateBuildTarget();

            buildTarget.AddTask<TaskWithRequiredInput>().SetParameter("Foo", "hi");

            const string expected = @"Inputs:
  Foo = hi
";

JayBazuzi

        private void LogProperty(PropertyInfo propertyInfo)
        {
            string name = propertyInfo.Name;
            var value = propertyInfo.GetValue(this);
            if (value is ITaskItem[])
            {
                LogTaskItems(value as ITaskItem[], name);
            }
            else
            {

JayBazuzi

class AssertNoBindingErrorsTraceListener : TraceListener
{
    readonly StringBuilder messageBuilder = new StringBuilder();


    public AssertNoBindingErrorsTraceListener(SourceLevels level)
    {
        PresentationTraceSources.DataBindingSource.Listeners.Add(this);
        PresentationTraceSources.DataBindingSource.Switch.Level = level;
    }

JayBazuzi

              new Dictionary<int, string>
                {
                    { 3, "Fizz"},
                    { 5, "Buzz"},
                    {15, "FizzBuzz"},
                }
              .Where(item => i % item.Key == 0)
              .Select(item => item.Value)
              .LastOrDefault() ?? i.ToString();

JayBazuzi

        interface I
        {
            string Get(int i);
        }

        private class Fizz : I
        {
            public string Get(int i)
            {
                return "Fizz";