Added tests for TestEngine

Author: rubberduck203

RubberduckTests/RubberduckTests.csproj

@@ -189,6 +189,7 @@
     <Compile Include="SourceControl\SourceControlTests.cs" />
     <Compile Include="SourceControlConfig.cs" />
     <Compile Include="UI\Refactorings\ReorderParameters\ReorderParametersRefactoringTests.cs" />
+    <Compile Include="UnitTesting\EngineTests.cs" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\RetailCoder.VBE\Rubberduck.csproj">