The only way i could get this project to build and run was to change the transform to explicitly target 4.0.0.1 for mvc and webapi, otherwise nothing works and horribly cryptic build errors. Added the tests for the BackgroundTaskRunner

src/Umbraco.Tests/Scheduling/BackgroundTaskRunnerTests.cs

@@ -0,0 +1,200 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using NUnit.Framework;
+using Umbraco.Core;
+using Umbraco.Web.Scheduling;
+
+namespace Umbraco.Tests.Scheduling
+{
+    [TestFixture]
+    public class BackgroundTaskRunnerTests
+    {
+
+
+        [Test]
+        public void Startup_And_Shutdown()
+        {
+            BackgroundTaskRunner<IBackgroundTask> tManager;
+            using (tManager = new BackgroundTaskRunner<IBackgroundTask>(true, true))
+            {
+                tManager.StartUp();
+            }
+
+            NUnit.Framework.Assert.IsFalse(tManager.IsRunning);
+        }
+
+        [Test]
+        public void Startup_Starts_Automatically()
+        {
+            BackgroundTaskRunner<BaseTask> tManager;
+            using (tManager = new BackgroundTaskRunner<BaseTask>(true, true))
+            {
+                tManager.Add(new MyTask());
+                NUnit.Framework.Assert.IsTrue(tManager.IsRunning);
+            }
+        }
+
+        [Test]
+        public void Task_Runs()
+        {
+            var myTask = new MyTask();
+            var waitHandle = new ManualResetEvent(false);
+            BackgroundTaskRunner<BaseTask> tManager;
+            using (tManager = new BackgroundTaskRunner<BaseTask>(true, true))
+            {
+                tManager.TaskCompleted += (sender, task) => waitHandle.Set();
+
+                tManager.Add(myTask);
+
+                //wait for ITasks to complete
+                waitHandle.WaitOne();
+
+                NUnit.Framework.Assert.IsTrue(myTask.Ended != default(DateTime));
+            }
+        }
+
+        [Test]
+        public void Many_Tasks_Run()
+        {
+            var tasks = new Dictionary<BaseTask, ManualResetEvent>();
+            for (var i = 0; i < 10; i++)
+            {
+                tasks.Add(new MyTask(), new ManualResetEvent(false));
+            }
+
+            BackgroundTaskRunner<BaseTask> tManager;
+            using (tManager = new BackgroundTaskRunner<BaseTask>(true, true))
+            {
+                tManager.TaskCompleted += (sender, task) => tasks[task.Task].Set();
+
+                tasks.ForEach(t => tManager.Add(t.Key));
+
+                //wait for all ITasks to complete
+                WaitHandle.WaitAll(tasks.Values.Select(x => (WaitHandle)x).ToArray());
+
+                foreach (var task in tasks)
+                {
+                    NUnit.Framework.Assert.IsTrue(task.Key.Ended != default(DateTime));
+                }
+            }
+        }
+
+        [Test]
+        public void Tasks_Can_Keep_Being_Added_And_Will_Execute()
+        {
+            Func<Dictionary<BaseTask, ManualResetEvent>> getTasks = () =>
+            {
+                var newTasks = new Dictionary<BaseTask, ManualResetEvent>();
+                for (var i = 0; i < 10; i++)
+                {
+                    newTasks.Add(new MyTask(), new ManualResetEvent(false));
+                }
+                return newTasks;
+            };
+
+            IDictionary<BaseTask, ManualResetEvent> tasks = getTasks();
+
+            BackgroundTaskRunner<BaseTask> tManager;
+            using (tManager = new BackgroundTaskRunner<BaseTask>(true, true))
+            {
+                tManager.TaskCompleted += (sender, task) => tasks[task.Task].Set();
+
+                //execute first batch
+                tasks.ForEach(t => tManager.Add(t.Key));
+
+                //wait for all ITasks to complete
+                WaitHandle.WaitAll(tasks.Values.Select(x => (WaitHandle)x).ToArray());
+
+                foreach (var task in tasks)
+                {
+                    NUnit.Framework.Assert.IsTrue(task.Key.Ended != default(DateTime));
+                }
+
+                //execute another batch after a bit
+                Thread.Sleep(2000);
+
+                tasks = getTasks();
+                tasks.ForEach(t => tManager.Add(t.Key));
+
+                //wait for all ITasks to complete
+                WaitHandle.WaitAll(tasks.Values.Select(x => (WaitHandle)x).ToArray());
+
+                foreach (var task in tasks)
+                {
+                    NUnit.Framework.Assert.IsTrue(task.Key.Ended != default(DateTime));
+                }
+            }
+        }
+
+        [Test]
+        public void Task_Queue_Will_Be_Completed_Before_Shutdown()
+        {
+            var tasks = new Dictionary<BaseTask, ManualResetEvent>();
+            for (var i = 0; i < 10; i++)
+            {
+                tasks.Add(new MyTask(), new ManualResetEvent(false));
+            }
+
+            BackgroundTaskRunner<BaseTask> tManager;
+            using (tManager = new BackgroundTaskRunner<BaseTask>(true, true))
+            {
+                tManager.TaskCompleted += (sender, task) => tasks[task.Task].Set();
+
+                tasks.ForEach(t => tManager.Add(t.Key));
+
+                ////wait for all ITasks to complete
+                //WaitHandle.WaitAll(tasks.Values.Select(x => (WaitHandle)x).ToArray());
+
+                tManager.Stop(false);
+                //immediate stop will block until complete - but since we are running on 
+                // a single thread this doesn't really matter as the above will just process
+                // until complete.
+                tManager.Stop(true);
+
+                NUnit.Framework.Assert.AreEqual(0, tManager.TaskCount);
+            }
+        }
+
+      
+
+       
+        private class MyTask : BaseTask
+        {
+            public MyTask()
+            {
+            }
+
+            public override void Run()
+            {
+                Thread.Sleep(500);
+            }
+
+            public override void Cancel()
+            {
+
+            }
+        }
+
+        public abstract class BaseTask : IBackgroundTask
+        {
+            public Guid UniqueId { get; protected set; }
+
+            public abstract void Run();
+            public abstract void Cancel();
+
+            public DateTime Queued { get; set; }
+            public DateTime Started { get; set; }
+            public DateTime Ended { get; set; }
+
+            public virtual void Dispose()
+            {
+                Ended = DateTime.Now;
+            }
+        }
+
+    }
+}

src/Umbraco.Tests/Umbraco.Tests.csproj

@@ -249,6 +249,7 @@
     <Compile Include="PublishedContent\StronglyTypedModels\Textpage.cs" />
     <Compile Include="PublishedContent\StronglyTypedModels\TypedModelBase.cs" />
     <Compile Include="PublishedContent\StronglyTypedModels\UmbracoTemplatePage`T.cs" />
+    <Compile Include="Scheduling\BackgroundTaskRunnerTests.cs" />
     <Compile Include="Services\LocalizationServiceTests.cs" />
     <Compile Include="Services\MemberServiceTests.cs" />
     <Compile Include="Services\MediaServiceTests.cs" />

src/Umbraco.Web.UI/Global.asax

@@ -1 +1 @@
-<%@ Application Codebehind="Global.asax.cs" Inherits="Umbraco.Web.UmbracoApplication" Language="C#" %>
+<%@ Application Inherits="Umbraco.Web.UmbracoApplication" Language="C#" %>

src/Umbraco.Web.UI/web.Template.Debug.config

@@ -46,7 +46,7 @@
     
     <compilation debug="true" xdt:Transform="SetAttributes(debug)" />
     <trust xdt:Transform="Remove" />
-    <trust level="Medium" originUrl=".*"  xdt:Transform="Insert" />
+    <!--<trust level="Medium" originUrl=".*"  xdt:Transform="Insert" />-->
   </system.web>
 
   <runtime>
@@ -64,7 +64,14 @@
 												 xdt:Locator="Condition(_defaultNamespace:assemblyIdentity[@name='System.Web.Mvc']])"/>
       <dependentAssembly xdt:Transform="Insert">
         <assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" />
-        <bindingRedirect oldVersion="1.0.0.0-4.0.0.0" newVersion="4.0.0.0" />
+        <bindingRedirect oldVersion="1.0.0.0-4.0.0.1" newVersion="4.0.0.1" />
+      </dependentAssembly>
+      
+       <dependentAssembly xdt:Transform="Remove"
+												 xdt:Locator="Condition(_defaultNamespace:assemblyIdentity[@name='System.Net.Http']])"/>
+      <dependentAssembly xdt:Transform="Insert">
+        <assemblyIdentity name="System.Net.Http" publicKeyToken="31bf3856ad364e35" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.0.1" newVersion="4.0.0.1"/>
       </dependentAssembly>
 
       <dependentAssembly xdt:Transform="Remove"

src/Umbraco.Web/Umbraco.Web.csproj

@@ -753,7 +753,9 @@
     <Compile Include="Routing\IContentFinder.cs" />
     <Compile Include="Routing\RoutingContext.cs" />
     <Compile Include="umbraco.presentation\EnsureSystemPathsApplicationStartupHandler.cs" />
-    <Compile Include="umbraco.presentation\install\steps\Definitions\LegacyClasses.cs" />
+    <Compile Include="umbraco.presentation\install\steps\Definitions\LegacyClasses.cs">
+      <SubType>ASPXCodeBehind</SubType>
+    </Compile>
     <Compile Include="umbraco.presentation\install\utills\LegacyClasses.cs">
       <SubType>ASPXCodeBehind</SubType>
     </Compile>