wired up xunit and a few simple tests to start

tests/CleanArchitecture.Tests/CleanArchitecture.Tests.xproj

@@ -4,7 +4,6 @@
     <VisualStudioVersion Condition="'$(VisualStudioVersion)' == ''">14.0</VisualStudioVersion>
     <VSToolsPath Condition="'$(VSToolsPath)' == ''">$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)</VSToolsPath>
   </PropertyGroup>
-
   <Import Project="$(VSToolsPath)\DotNet\Microsoft.DotNet.Props" Condition="'$(VSToolsPath)' != ''" />
   <PropertyGroup Label="Globals">
     <ProjectGuid>0f6a8976-f61a-4eb3-a38c-0a2ed39f157b</ProjectGuid>
@@ -13,9 +12,11 @@
     <OutputPath Condition="'$(OutputPath)'=='' ">.\bin\</OutputPath>
     <TargetFrameworkVersion>v4.6</TargetFrameworkVersion>
   </PropertyGroup>
-
   <PropertyGroup>
     <SchemaVersion>2.0</SchemaVersion>
   </PropertyGroup>
+  <ItemGroup>
+    <Service Include="{82a7f48d-3b50-4b1e-b82e-3ada8210c358}" />
+  </ItemGroup>
   <Import Project="$(VSToolsPath)\DotNet\Microsoft.DotNet.targets" Condition="'$(VSToolsPath)' != ''" />
 </Project>
\ No newline at end of file

tests/CleanArchitecture.Tests/Core/Model/ToDoItemMarkCompleteShould.cs

+using CleanArchitecture.Core.Model;
+using CleanArchitecture.Core.Events;
+using System.Linq;
+using Xunit;
+
+namespace CleanArchitecture.Tests.Core.Model
+{
+    public class ToDoItemMarkCompleteShould
+    {
+        [Fact]
+        public void SetIsDoneToTrue()
+        {
+            var item = new ToDoItem();
+
+            item.MarkComplete();
+
+            Assert.True(item.IsDone);
+        }
+
+        [Fact]
+        public void RaiseToDoItemCompletedEvent()
+        {
+            var item = new ToDoItem();
+
+            item.MarkComplete();
+
+            Assert.Equal(1, item.Events.Count());
+            Assert.IsType<ToDoItemCompletedEvent>(item.Events.First());
+        }
+    }
+}
\ No newline at end of file

tests/CleanArchitecture.Tests/project.json

 {
   "version": "1.0.0-*",
-
+  "testRunner": "xunit",
   "dependencies": {
     "CleanArchitecture.Core": "1.0.0-*",
-    "NETStandard.Library": "1.6.0"
+    "NETStandard.Library": "1.6.0",
+    "xunit": "2.2.0-beta2-build3300",
+    "dotnet-test-xunit": "2.2.0-preview2-build1029"
   },
 
   "frameworks": {
-    "netstandard1.6": {
-      "imports": "dnxcore50"
+    "netcoreapp1.0": {
+      "dependencies": {
+        "Microsoft.NETCore.App": {
+          "type": "platform",
+          "version": "1.0.0"
+        }
+      }
     }
   }
 }